study of amsoil interceptor 2 cycle oil in ski-doorotax engines

7/31/2019 Study of AMSOIL Interceptor 2 cycle oil in Ski-DooRotax engines

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T E C H N I C A L S T U D Y

A Study of INTERCEPTOR

Synthetic 2-Stroke Oil for

Ski-Doo Rotax E-TEC EnginesWith ASTM Lubricity and Detergency Testing

Published August 2012
http://www.oilshopper.com/


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Editors Note

When Bombardier Recreational Products (BRP ) claimed AMSOILINTERCEPTOR Synthetic 2-Stroke Oil does not meet the performance demandsof its Rotax E-TEC engines used in certain models of Ski-Doo snowmobiles,

AMSOIL immediately took notice. The results of BRPs test, which depict ascuffed piston allegedly lubricated with INTERCEPTOR, directly contradict theresults experienced by AMSOIL customers and achieved in several real-worldlELD TRIALS AND INDUSTRY ACCEPTED LABORATORY TESTS ).4%2#%04/2-strated exceptional performance in the following tests and trials:

Field Trials & Case Studiess 2OCKY -OUNTAIN 2ENTAL &LEET &IELD 4RIALs %XHAUST 0OWER 6ALVE &IELD 3TUDY IN 0OLARIS and Rotax enginess -ILE 2OTAX E-TEC Engine Case Study

Industry-Standard Bench Testings !34- 4# 3EQUENCE ) $ETERGENCY 4EST !34- $ -ODs .--! 4# 7 !& ,UBRICITY 4ESTs *!3/ /NE (OUR $ETERGENCY 4EST -s -ULTIPLE HOUR #YCLE 3NOWMOBILE %NGINE $YNAMOMETER 4ESTS FOR DEPOSITS VALVEs (IGH &REQUENCY 2ECIPROCATING 2IG (&22 4EST FOR LUBRICITY AND lLM STRENGTH !34- $s 3TANDARD 4EST -ETHOD FOR $ETERMINATION OF ,UBRICITY OF 4WO 3TROKE #YCLE 'ASOLINE %

!34- $ -OD

INTERCEPTORs high level of performance and protection in demanding two-stroke applications is well-documented and indisputable.

4HEREFORE !-3/), IS CHALLENGING "20 S CLAIM THAT ).4%2#%04/2 WILL FAIL TO ADEQUATELY PRSNOWMOBILE ENGINES "ASED ON ITS lNDINGS "20 STRONGLY IMPLIES ITS OWN 803 3YNTHEToften more expensive, is the only oil safe to use in Rotax E-TEC engines.

!-3/), FORMALLY REQUESTED "20 MAKE AVAILABLE ITS OIL SPECIlCATIONS AGAINST WHICH TO QUfor recommended use in Rotax E-TEC engines. BRP refused. Instead, BRP provided a summary of the

HOUR ENGINE DYNAMOMETER TEST IT PERFORMED IN ITS ATTEMPT TO DISCREDIT ).4%2#%04/MODIlED THE TEST SNOWMOBILE S ELECTRONIC CONTROL MODULE %#- ON THE ASSUMPTIONFOR HOURS UNDER MODIlED CONDITIONS CAN SIMULATE HOURS OF NORMAL SERVICE Wthe engines life expectancy. Under the premise of BRPs testing, the life of a two-stroke engine can beaccurately predicted within a short period of time by modifying its operating conditions. BRPs results shouldbe viewed with skepticism. In effect, BRP created forced-failure conditions through engine operation and%#- MODIlCATIONS THAT ARE NOT REPRESENTATIVE OF REAL WORLD CONDITIONS OF USE OR AN standards. While BRP implies expert status regarding the formulation of two-cycle oils, the company is notAN OIL MANUFACTURER )N CONTRAST !-3/), ).# HAS NEARLY YEARS EXPERIENCE FORMULstroke motor oils.

To demonstrate INTERCEPTORs effectiveness in real-world conditions, AMSOIL INC. conducted an extremedynamometer test on a Rotax E-TEC engine. In contrast to BRPs methodology, the test snowmobiles ECMWAS NOT MODIlED AND CONDITIONS WERE DESIGNED TO REPLICATE THE OPERATING CONDITIONencounter in the real world.

This document contains a description of the test along with full results. AMSOIL welcomes any outside entityto perform its own testing.


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Overview

$IRECT FUEL INJECTION $&) SOPHISTICATED COMPUTER PROGRAMMIN electronic oil injection and other developments have enabled a new era in two-stroke powersports engine design. Modern engines offer an unprecedented

COMBINATION OF INCREASED POWER IMPROVED FUEL EFlCIENCY AND R emissions.

The increased level of performance comes at a price: Modern enginesencounter increased heat, friction and stress while often using less oil toLUBRICATE AND PROTECT VITAL ENGINE PARTS 4HE 2OTAX % 4%# 2 IS A LIQUID COOLED $&) TWO STROKE ENGINE CAPABLE OF RPM )T INCORPORATES ELECTRONIC EQUIPMENT THAT CAN ADJUST THE AMOUuses depending on operating conditions. As a result, the engine produces fewerexhaust emissions, but undergoes increased severity. Durable oils formulatedto provide increased lubricity are best suited for powersports engines like the2OTAX % 4%# 2

Objective#OMPARE THE ABILITY OF !-3/), ).4%2#%04/2 3YNTHETIC 3TROKE /IL AND 803 3YNTHETIC #Y PROTECT AGAINST ENGINE WEAR AND DEPOSITS IN A SNOWMOBILE EQUIPPED WITH A 2OTAX % &URTHER COMPARE THE LUBRICITY AND DETERGENCY PROPERTIES OF EACH OIL USING INDUSTR Society of Testing and Materials (ASTM) testing. Demonstrate that INTERCEPTOR exceeds the performanceREQUIREMENTS OF HIGH PERFORMANCE $&) SNOWMOBILE ENGINES IN SEVERE OPERATING COND

Note: 803 3YNTHETIC #YCLE /IL BATCH CODE OBTAINED IN $ECEMBER ).4%2#%04/2 3YNTHETIC 3TROKE /IL BATCH CODE PRODUCED $ECEMBER U TESTING COMPLETED IN -ARCH "OTH OILS WERE AVAILABLE TO CONSUMERS AT THE TIME

DO NOT REPRESENT FUTURE FORMULATION CHANGES 4HIS TEST DATA REmECTS SINGLE TEST R repeatability was not determined.

MethodologyAMSOIL developed the extreme dynamometer test on Rotax E-TEC engines in order to determine eachOIL S LEVEL OF ENGINE PROTECTION &OLLOWING EACH HOUR PROCEDURE THE ENGINE Wcomponents rated by an ASTM calibrated rater. Merit ratings for each set of components (e.g. piston skirts,PISTON RINGS ETC WERE DETERMINED USING THE APPROPRIATE TECHNIQUES AND RATING SC Coordinating Research Council, Inc. Deposit Rating Manual No. 20 . Some components received a meritRATING BASED ON A SCALE WITH REPRESENTING A COMPONENT FREE OF DEFECTS AN catastrophic distress. Others received merit ratings indicating the percentage of an area with defects

E G THE PERCENTAGE PISTON SKIRT AREA CONTAINING SCUFlNG

The lubricity properties of each oil were compared using the Standard Test Method for Determination of

,UBRICITY OF 4WO 3TROKE #YCLE 'ASOLINE %NGINE ,UBRICANTS !34- $ -OD 4HE DETER of each oil were compared using the Standard Test Method for Determination of the Ability of Lubricants to-INIMIZE 2ING 3TICKING AND 0ISTON $EPOSITS IN 4WO 3TROKE #YCLE 'ASOLINE %NGINES /THER

!34- $ -OD )N BOTH !34- TESTS THE REFERENCE OIL WAS REPLACED BY 803 3YNTHEestablish a performance benchmark and facilitate a direct comparison. Both ASTM tests were performedby an independent lab.

Extreme Dynamometer Test on Rotax E-TEC Engines4HE %XTREME $YNAMOMETER 4EST ON 2OTAX % 4%# %NGINES SUBJECTED A CANDIDATE OIL TODYNO TESTING SUFlCIENT TIME TO SIMULATE A FULL SEASON OF SNOWMOBILE RIDING %ACH included periodic breaks to refuel and overnight periods of inactivity to simulate real-world operation.&OLLOWING COLLECTION AND DISSEMINATION ALL DATA WAS COMPARED TO DETERMINE EACH


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Test Snowmobile4HE CANDIDATE OIL WAS INSTALLED IN A "20 3KI $OO 2ENEGADE 8 SNOWMOBILE EQUIPPE % 4%# 2 ENGINE 4HE SNOWMOBILE WAS PURCHASED NEW FROM AN AUTHORIZED "20 DEAL

Engine Dynamometer4HE SNOWMOBILE WAS CONNECTED TO A ,AND AND 3EA $9./MITE ENGINE DYNAMOMETER EQU

INCH WATER COOLED CENTRIFUGAL PUMP WATER BRAKE CAPABLE OF ABSORBING HP 4H

using the test snowmobile to ensure the most accurate results possible. Throttle position and load controlWERE STRICTLY CONTROLLED VIA COMPUTER $ATA WAS GATHERED USING $9./MITE 0RO $ATA !C 4HE DYNO USES WATER UNDER PRESSURE TO PLACE LOAD ON THE MOTOR SIMULATING THE T snowmobiles continuously variable transmission.

Pre-Test Procedure!S IS STANDARD PRACTICE THE DYNO WAS lRST CALIBRATED ALONG WITH THE TEST SNOWMOB &OLLOWING CALIBRATION THE SNOWMOBILE S ENGINE WAS REFRESHED WITH NEW CYLINDERSrings, wrist pins and wrist pin bearings using only authorized BRP replacement parts and standardENGINE BUILDING PRACTICES TO ENSURE OPERATION TIME DURING CALIBRATION DID NOT AFFEC

4O ENSURE ACCURACY VARIABLES INCLUDING FUEL QUALITY COOLANT MIXTURE RATIO RPM CONTROLLED FROM ONE HOUR PROCEDURE TO THE NEXT 4HE MAIN COOLING UNIT CONTROTHE FACTORY PRE SET THERMOSTAT 0ER "20 S SPECIlCATIONS A MIXTURE OF COOLANT &OR ADDITIONAL CONTROL PURPOSES AND TO FURTHER LIMIT VARIABLES ENGINE PARTS WEREeach dyno procedure. (Pre- and post-test measurements are included in Appendix A.) The snowmobiles%#- WAS NOT MODIlED IN ANY WAY

Care was taken to replicate real-world operating conditions while conforming to BRPs recommendationsgiven in the snowmobile owners manual. The same batch of pump gas was used throughout testing. The gasMET "20 S SPECIlCATIONS OF A MINIMUM OCTANE RATING AND A MAXIMUM ETHANOL CONT!PPENDIX " 'AS CONTAINING PERCENT ETHANOL WAS USED BECAUSE IT INCREASES ENGINEgas with reduced ethanol content, representing a worst-case scenario that further challenges each oil.

50-Hour Dyno Procedure7ITH THE ENGINE PREPARED A CANDIDATE OIL WAS INSTALLED IN THE SNOWMOBILE S OIL TAFUEL TANK lLLED TO THE BOTTOM OF THE lLLER NECK

To supplement the traditional dyno cooling tower and to further simulate the cooling effects of snow in actualuse, an auxiliary spray bar directed a controlled amount of water on the front and rear heat exchangers. AHIGH SPEED FAN WAS POSITIONED TO PROVIDE ADDITIONAL AIR UNDERNEATH THE SNOWMOBILEIN REAL WORLD RIDING CONDITIONS /NCE THE ENGINE REACHED & THE AUTOMATED DY

Each dyno procedure was conducted according to the same computerized script. The engine underwentbreak-in according to its pre-programmed ECM, which was reset prior to conducting the second procedure.4HE DYNO PROGRAM REQUIRED THE ENGINE TO UNDERGO ALL TYPES OF OPERATING CONDITIONPARTIAL THROTTLE OPERATION AND FULL THROTTLE OPERATION -AXIMUM RPM EACH PROCEDURE AND EXHAUST GAS TEMPERATURES OFTEN SURPASSED & ILLUSTRATING

/NCE THE HOUR DYNO PROCEDURE WAS COMPLETE THE ENGINE WAS DISASSEMBLED 4HE P measured and the post-test measurements documented. The parts were rated for wear and other distressby an ASTM calibrated rater. The complete upper end of the engine was again refreshed in preparation forTHE NEXT HOUR PROCEDURE


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Pistons __________________________________________________________________________________________________

AMSOIL INTERCEPTORSynthetic 2-Stroke Oil

XPS-2 Synthetic 2-Cycle Oil

3CRATCHING WHICH IS NOT LUBRICANT RELATED REFERS TO THE ALTERATION OF THE SKIRT SUSPENDED IN THE LUBRICANT FUEL AIR OR EMBEDDED IN A SURFACE 3CUFlNG IS LUBRICA A MATTE lNISH "OTH OILS COMPLETELY PREVENTED PISTON SKIRT SCUFlNG 4HE PISTONS ARE coating that is black in color. INTERCEPTOR effectively protected pistons from wear and limited removal ofthe black coating.

Piston Scratching, PTO 2%0ISTON 3CRATCHING -!'

0ISTON 3CUFlNG 04/

0ISTON 3CUFlNG -!'

% Coating Removed, Exhaust Side, PTO

% Coating Removed, Intake Side, PTO

#OATING 2EMOVED %XHAUST 3IDE -!'

#OATING 2EMOVED )NTAKE 3IDE -!'

PistonSkirt

Results of Extreme Dynamometer Teston Rotax E-TEC Engines

Piston Scratching, PTO

0ISTON 3CRATCHING -!'

0ISTON 3CUFlNG 04/

0ISTON 3CUFlNG -!'

% Coating Removed, Exhaust Side, PTO

% Coating Removed, Intake Side, PTO

#OATING 2EMOVED %XHAUST 3IDE -!'

#OATING 2EMOVED )NTAKE 3IDE -!'

PTO1

MAG 2

PTO

MAG

Intake Side Exhaust Side Intake Side Exhaust Side

Intake Side Exhaust Side Intake Side Exhaust Side

1 Power take off side 2 Magneto side


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Piston Rings & Lands _______________________________________________________________________________



0ISTON RING DEPOSITS CAN CAUSE RING STICKING AND CONSEQUENT POWER LOSS 4HE RINGSPERFECT MERIT RATINGS DEMONSTRATING EACH OIL PREVENTED STICKING

Ring Sticking, PTO

2ING 3TICKING -!'

Crown Land, PTO#ROWN ,AND -!'

Ring Sticking, PTO

2ING 3TICKING -!'

Crown Land, PTO#ROWN ,AND -!'

PTO MAGPTO MAG


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To protect against pre-ignition and poor performance, two-stroke oils must resist piston crown depositscaused by the elevated temperatures inside the combustion chamber. Piston crowns in both engines earnedhigh ratings for deposits, with INTERCEPTOR earning high ratings for undercrown deposits as well.

Piston Crown, PTO

0ISTON #ROWN -!'

Undercrown, PTO

5NDERCROWN -!'

Piston Crown, PTO

0ISTON #ROWN -!'

Undercrown, PTO

5NDERCROWN -!'

MAG PTOMAG PTO

Piston Crowns & Undercrowns ____________________________________________________________________

Undercrowns Undercrowns


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Wrist Pins & Bearings _______________________________________________________________________________



The wrist pins and bearings undergo constant rotational stress and represent areas prone to metal-to-metalCONTACT AND WEAR 4HE OIL MUST MAINTAIN ITS LUBRICATING lLM FOR OPTIMUM PROTECTIOwear effectively and provided a high level of protection.

PTO MAGPTO MAG

Piston Wristpins, PTO

0ISTON 7RISTPINS -!' Piston Wristpin Bearing, PTO

0ISTON 7RISTPIN "EARING -!'

Wristpin Case Condition, PTO 'OOD

7RISTPIN #ASE #ONDITION -!' 'OOD

Piston Wristpins, PTO

0ISTON 7RISTPINS -!' Piston Wristpin Bearing, PTO

0ISTON 7RISTPIN "EARING -!'

Wristpin Case Condition, PTO 'OOD

7RISTPIN #ASE #ONDITION -!' 'OOD

Wrist Pin Bearing Wrist Pin Bearing Wrist Pin Bearing Wrist Pin Bearing

Cylinder Heads ________________________________________________________________________________________



Excessive cylinder head deposits are undesirable and can negatively affect performance. Both oilsdemonstrated strong cleanliness properties.

#YLINDER (EAD 04/

#YLINDER (EAD -!'

#YLINDER (EAD 04/

#YLINDER (EAD -!'

PTO MAGPTO MAG


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Exhaust Ports _________________________________________________________________________________________



%XCESSIVE EXHAUST PORT DEPOSITS AND BLOCKAGE RESTRICT AIRmOW AND CONTRIBUTE TO P oils demonstrated strong cleanliness properties as demonstrated by the high merit ratings for deposits andvirtually no port blockage.

Exhaust Port, PTO

%XHAUST 0ORT -!'

% Blockage, PTO

"LOCKAGE -!'

Exhaust Port, PTO

%XHAUST 0ORT -!'

% Blockage, PTO

"LOCKAGE -!'

Intake Ports & Cylinders ____________________________________________________________________________



Intake port deposits in both engines were virtually non-existent. Both oils inhibited cylinder bore wearextremely well, demonstrating strong wear protection. Overall merit ratings were high for both sets ofcylinders.

PTO MAGPTO MAG

Intake Port, PTO

)NTAKE 0ORT -!'

% Scratching, PTO

3CRATCHING -!'

#ROSS (ATCH 2EMOVED 04/

#ROSS (ATCH 2EMOVED -!'

Rating, PTO

2ATING -!'

Intake Port, PTO

)NTAKE 0ORT -!'

% Scratching, PTO

3CRATCHING -!' #ROSS (ATCH 2EMOVED 04/

#ROSS (ATCH 2EMOVED -!'

Rating, PTO

2ATING -!'
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Exhaust Power Valves _______________________________________________________________________________



Excessive hard carbon deposits and varnish on the exhaust power valves can interfere with operation,reducing engine performance. None of the exhaust power valves tested exhibited any sticking, indicatingboth oils provided strong cleanliness properties.

PTO TopPTO Top

PTO BottomPTO Bottom


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Exhaust Power Valves _______________________________________________________________________________



MAG TopMAG Top

MAG BottomMAG Bottom


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Results of the Standard Test Method for Determinationof Lubricity of Two-Stroke/Cycle Gasoline EngineLubricants (ASTM D 4863 Mod.)

7HETHER USING A GAS OIL PRE MIX OR DIRECT OIL INJECTION TWO STROKE ENGINES CAN OPless oil than is desirable. In direct-oil-injected engines, throttle bursts can also result in the engine operatingWITH REDUCED OIL FOR SHORT PERIODS 4HE OIL S LUBRICITY IS VITAL TO PROTECTING AGAINunder these operating conditions.

4HE !34- $ LUBRICITY TEST EVALUATES THE ABILITY OF A LUBRICANT TO MINIMIZE PISTON SCUFlNG IN TWO STROKE SPARK IGNITION GASOLINE ENGINES 4HE ENGINE IS OPERATED AT Amuch leaner than the ratios used by Rotax E-TEC engines.

! REFERENCE OIL IS RUN IN A 9AMAHA #% 3 CC ENGINE AT WIDE OPEN THROTTLE 4HE COALLOWING THE ENGINE TEMPERATURE TO INCREASE (EAT CAUSES PISTON EXPANSION CAUSINGTORQUE TO DECREASE 4HE TORQUE VALUE OF THE REFERENCE OIL AT THREE DIFFERENT TEMP CANDIDATE OIL UNDERGOES THE SAME PROCEDURE AND ITS TORQUE VALUE AT THE SAME TEM'REATER TORQUE LOSS MEANS LOWER POWER AND LESS LUBRICITY 4HE TORQUE REDUCTION Vto or below the corresponding value for the reference oil in order to receive a passing grade. In short, lowerVALUES MEAN BETTER LUBRICITY 'ENERAL ENGINE CONDITION IS EVALUATED AT THE END OF

To facilitate a direct comparison, the benchmark reference oil was replaced by XPS-2Synthetic 2-Cycle Oil.

4ORQUE VALUES FOR ).4%2#%04/2 WERE LOWER THAN THE CORRESPONDING VALUES FOR 803 3INTERCEPTOR demonstrated strong lubricity properties and surpassed the benchmark for lubricity at the

PERCENT CONlDENCE LEVEL

Temperature(F)

XPS-2 Synthetic2-Cycle Oil(Reference)


572 3.23 lb. in. 2.83 lb. in.

617 4.00 lb. in. 3.62 lb. in.

662 4.79 lb. in. 4.42 lb. in.


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Results of the ASTM TC Sequence I Detergency Test(ASTM D 4857 Mod.)

(IGH TEMPERATURE HIGH RPM TWO STROKE ENGINES ARE SUSCEPTIBLE TO THE EFFECTS OF LUSTICKING DEPOSITS AND VARNISH CAN CAUSE DIFlCULT STARTS AND DECREASED OPERATING EFdetergency properties are critical to resisting harmful deposits and varnish.

4HE !34- $ DETERGENCY TEST IS DESIGNED TO EVALUATE THE CLEANLINESS PROPERTIES O engine lubricant. Particular attention is paid to piston skirt varnish, piston ring sticking, spark plug fouling,PRE IGNITION COMBUSTION CHAMBER DEPOSITS AND EXHAUST PORT BLOCKING 4ESTING IS DOratio.

4HE TEST USES A 9AMAHA 2$ " CC ENGINE DESIGNED TO OPERATE WITH A REFERENCE OICANDIDATE OIL IN THE OTHER !FTER HOURS OF RUN TIME THE ENGINE IS DISASSEMBLEDsticking and other distress.

To facilitate a direct comparison, the benchmark reference oil was replaced by XPS-2Synthetic 2-Cycle Oil.

Cylinder Heads ________________________________________________________________________________________

"OTH OILS PREVENTED CYLINDER LINER WEAR AND INHIBITED CYLINDER HEAD DEPOSITS WITH Oil earning a high rating.

AMSOIL INTERCEPTOR

Synthetic 2-Stroke Oil


Cylinder Liner Wear

#YLINDER (EAD $EPOSITS

Cylinder Liner Wear

#YLINDER (EAD $EPOSITS


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Pistons & Rings _______________________________________________________________________________________

"OTH OILS PREVENTED PISTON SKIRT SCUFNG AND RING STICKING TO THE TOP RING E0ISTON VARNISH RATINGS WERE ALSO HIGH WHILE ).4%2#%04/2 EARNED A HIGH RATINGINTERCEPTOR met or surpassed the performance benchmark in nearly every category.



ThrustThrust

Anti-ThrustAnti-Thrust

0ISTON 3CUFlNG 4HRUST

0ISTON 3CUFlNG !NTI 4HRUST

0ISTON 6ARNISH 4HRUST 0ISTON 6ARNISH !NTI 4HRUST

Ring Land

Ring Sticking, Top Ring

Ring Sticking, Second Ring

Piston Crown Deposits

0ISTON 3CUFlNG 4HRUST

0ISTON 3CUFlNG !NTI 4HRUST

0ISTON 6ARNISH 4HRUST 0ISTON 6ARNISH !NTI 4HRUST

Ring Land

Ring Sticking, Top Ring

Ring Sticking, Second Ring

Piston Crown Deposits


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Conclusion

Testing proves the effectiveness of AMSOIL INTERCEPTOR Synthetic 2-Stroke Oil in Rotax E-TEC enginesSPECIlCALLY AND HIGH PERFORMANCE $&) POWERSPORTS ENGINES IN GENERAL &OLLOWING

testing, merit ratings assigned to components by an ASTM calibrated rater offer convincing proof of perfor-MANCE WITH ).4%2#%04/2 EARNING PERFECT RATINGS FOR PISTON SKIRT SCUFlNG AND PISTON RFOR CYLINDER BORE CROSS HATCH REMOVAL EXHAUST PORT BLOCKING AND OTHER AREAS Wability to control deposits and inhibit wear. The results of the Extreme Dynamometer Test on Rotax E-TEC%NGINES DISPROVES "20 S ALLEGATION THAT !-3/), ).4%2#%04/2 3YNTHETIC 3TROKE /IL WILL FAPROTECT 2OTAX % 4%# ENGINES ).4%2#%04/2 EXCEEDS THE PERFORMANCE REQUIREMENTS

4HE RESULTS OF THE !34- $ LUBRICITY TEST PROVIDE ADDITIONAL PROOF OF PERFORMANCRATIO FAR LEANER THAN THE RATIOS PRODUCED BY THE 2OTAX % 4%# 2 ENGINE ).4%2#%04/INCREASED LUBRICITY COMPARED TO 803 3YNTHETIC #YCLE /IL AND SURPASSED THE PERFOADDITION ).4%2#%04/2 PREVENTED PISTON SKIRT SCUFlNG AND CYLINDER WEAR AND SHOWED SPROPERTIES IN THE !34- $ DETERGENCY TEST SURPASSING 803 3YNTHETIC #YCLE /IL Abenchmark in almost all instances.

4HESE RESULTS HAVE ALSO BEEN CONlRMED IN A -ILE 2OTAX % 4%# %NGINE #ASE 3TUD

TAKEN FROM A 3KI $OO 4.4 SNOWMOBILE EQUIPPED WITH A 2OTAX % 4%# 2 ENGINE EOR RING STICKING FOLLOWING MILES OF REAL WORLD AGGRESSIVE TRAIL RIDING

4HE CASE STUDY AND HOUR DYNO TEST ARE IN STARK CONTRAST TO "20 S HOUR ENGIN modifying the snowmobiles ECM, in effect forcing a failure using operating conditions not representativeof real-world use. It is the view of AMSOIL that BRPs test provides no value in determining the overallperformance of any oil, including INTERCEPTOR. AMSOIL, on the other hand, closely replicates the actualOPERATING CONDITIONS ENCOUNTERED BY OWNERS OF SNOWMOBILES EQUIPPED WITH 2OTAX %its decades of experience with powersports applications, AMSOIL concludes that BRP used a forced-failuretesting tactic to create failure conditions that do not exist in real-world use.

Based on the results of the Extreme Dynamometer Test on Rotax E-TEC Engines, AMSOIL guaranteesthat INTERCEPTOR Synthetic 2-Stroke Oil effectively lubricates Rotax E-TEC engines and is a high-performance replacement for BRPs more-costly XPS-2 Synthetic 2-Cycle Oil.

Use of AMSOIL INTERCEPTOR will not void BRPs warranty, as BRP would have enthusiasts believe.The right to use AMSOIL INTERCEPTOR in Rotax engines without voiding the warranty is protectedunder U.S. federal law by the Magnuson Moss Warranty Act of 1975. AMSOIL additionally warrants theuse of INTERCEPTOR in all Rotax engines according to the AMSOIL Limited Warranty (G1363).


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Appendix A: Pre- and Post-Test Measurements

Pre-Test Post-Test Pre-Test Post-Test

Cylinder, Magneto Side (MAG)

Bore at Top of Ring Travel$IAMETER INCHES

Bore at Bottom of Ring Travel$IAMETER INCHES

#OMPRESSION PSI

Cylinder, Power Take Off Side (PTO)Bore at Top of Ring Travel$IAMETER INCHES

Bore at Bottom of Ring Travel$IAMETER INCHES

#OMPRESSION PSI

Piston, Magneto Side (MAG)

$IAMETER INCHES

0ISTON #LEARANCE INCHES

0ISTON 7EIGHT WITHOUT RING G

0ISTON 2ING %ND 'AP INCHES0ISTON 2ING 7EIGHT G

7RIST 0IN 7EIGHT G

7RIST 0IN "EARING 7EIGHT G

RAVE Valve, Magneto Side (MAG)

7EIGHT G

Piston, Power Take Off Side (PTO)

$IAMETER INCHES

0ISTON #LEARANCE INCHES

0ISTON 7EIGHT WITHOUT RING G

0ISTON 2ING %ND 'AP INCHES

0ISTON 2ING 7EIGHT G

7RIST 0IN 7EIGHT G

7RIST 0IN "EARING 7EIGHT G

RAVE Valve, Power Take Off Side (PTO)

7EIGHT G

XPS-2 Synthetic2-Cycle OilBatch Code:


Batch Code:


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!PPENDIX " &UEL 3PECICATIONS

RON (Research Octane Number) 96.2

MON (Motor Octane Number) 87.2

R+M/2 (RON + MON/2) 91.7EtOH (Ethanol) 10.2%

Benzene 0.48%

Toluene 2.0%

0ARAFNS 64.7%

/LENS 6.2%

Aromatics 18.6%


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Contact your AMSOIL Dealer for more information on AMSOIL products or to place an order. You may alsoORDER DIRECT BY CALLING !-3/), ).# AT AND PROVIDING THE REFERRAL NU

Referral # _________________________________

study of amsoil interceptor 2 cycle oil in ski-doorotax engines

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