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Fuel Economy Savings Study

Testing Conducted and Data Accumulated By

EXEL / DHL At The Penske Truck Leasing Facility Lubbock, Texas and

NationaLease Facility In Lima, Ohio

Purpose of Testing

To Track Fuel Economy With And Without The Rentar Fuel Catalyst

Type of Testing

Five Class 8 Trucks – Baseline Vs. With Rentar Fuel Catalyst Ten Class 8 Trucks SEA Type IV Study Using Five Control Vehicles

Date of Testing

Lubbock, Texas Lima, Ohio Comparison Study Type IV Study

12/5/05 – 2/26/06 12/5/05 – 3/31/06

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Installation of Detroit Diesel Series 60

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Summary of Findings

Exel/DHL conducted fuel economy studies. They solely managed and

collected the data. The results are reported below.

In Lubbock Texas at the Penske Truck Leasing facility, Exel/DHL managed the creation of a baseline, installation of the Rentar Fuel

Catalyst and collection of the “post” data. The results as documented in the attached report due to the Rentar Fuel Catalyst

were a 5.1% average improvement in fuel consumption improvement on five Class 8 trucks.

In Lima Ohio at the NationaLease facility, Exel/DHL managed a

SAE/TMC Type IV fuel economy test procedure using ten Class 8 Trucks. The ten vehicles were tested to establish they were all

producing a similar consumption rate. The Rentar Fuel Catalyst’s were then installed on five of the vehicles and the other five became the “control trucks”. The results, as documented in the attached

report were a 4.59% average improvement in fuel consumption improvement on the five trucks with the Rentar Fuel Catalyst

installed.

The effect of using the Rentar Fuel Catalyst on the Exel/DHL truck fleet based on each vehicle averaging 105,000 miles per year and purchasing

fuel at an average of $2.49 per gallon would be a fuel cost reduction of $2270 per truck or $227,000 per 100 trucks annually. The return on

investment (ROI) or repayment of the cost of the catalyst would be approximately 8 months.

Test Protocol

Lubbock Texas - Controlled Comparison Testing

Exel/DHL selected 5 similar trucks with Detroit Diesel Engines.

Beginning and ending odometer readings were taken by Exel/DHL

(Llano) Manager Lyndon Read for Phase 1 and Phase 3. Lyndon also supplied the fuel usage for each truck in each phase. Fuel usage was

acquired from Exel’s official fuel billing records, provided by Penske, to ensure accuracy.

The testing was conducted at the Penske Truck Leasing facility in

Lubbock Texas. The 5 trucks were driven over similar routes and in similar weather conditions throughout the duration of the fuel

economy study. At the conclusion of the Comparison Study in Lubbock, Texas, the fleet mileage per gallon was compared prior to

4 fuel catalyst installation (Phase 1) to fleet mileage per gallon after

fuel catalyst installation (Phase 3).

Testing Timeline

Phase 1 – 12/5/05 – 1/8/06 31 Days Baseline information was collected on 5 trucks.

Phase 2 – 1/9/06 – 1/21/06 12 Days

Break-in Period – The Rentar Fuel Catalysts were installed. The engine was allowed to operate for 12 days before data was

taken.

Phase 3 – 1/22/06 – 2/26/06 35 Days Data was collected from the 5 trucks that were now

operating with the fuel catalyst in place for comparison

to the baseline data.

Data was collected over 66 days during which a total of 123,954 miles were accumulated.

The fuel consumption improvement was 5.1%

Lima Ohio – SAE Type IV (Testing With Control Vehicles)

Exel/DHL selected 10 similar trucks with 2005 Cummins ISM

Engines. These trucks were randomly divided into two groups of 5. The group that did not have the fuel catalyst installed was designated

the Control Group. The group that had the catalyst installed was designated the Pre-Catalyst Group (prior to installation of the

catalyst) and the Catalyst Group (after installation of the catalyst).

Beginning and ending odometer readings were taken by Exel Manager Scott Reedy for Phase 1 and Phase 3. Scott also supplied the fuel

usage for each truck in each phase. Fuel usage was acquired from Exel’s official fuel billing records, provided by NationaLease, to ensure

accuracy.

This was an extremely large Type IV Study in that 10 trucks were

used and 289,300 miles of data was recorded. Potential variables were accounted for and neutralized through the use of a Control

Group.

Neutralized Variables

5 weather conditions drivers routes loads trucks with 2005 Cummins ISM Engines

After the baseline MPG was established for the Control Group and the

Pre-Catalyst Group (Phase 1), it was noted that the difference between these two groups was only .11%, or roughly 1/9th of one

percent. With this in mind, a general baseline for all 10 trucks was established.

At the conclusion of the SAE Type IV Study (Phase 3) in Lima, Ohio,

the Mpg of the two groups (Control Group and Catalyst Group) of trucks were compared independently to the established baseline

(Phase 1) and the slight Control Group increase was deducted from

the large Catalyst Group increase to determine the overall effectiveness of the Rentar Fuel Catalyst. This test was conducted at

the NationaLease facility in Lima Ohio.

Testing Timeline –

Phase 1 – 12/5/05 – 1/15/06 38 Days Baseline information was collected from the Control Group (5

trucks) and also from the Pre-Catalyst Group (5 trucks), which would eventually have the Rentar fuel catalyst installed.

Phase 2 – 1/16/06 – 2/1/06 15 Days

Break-in Period – The Rentar Fuel Catalysts were only installed on the 5 Pre-Catalyst trucks. The engine was allowed

to operate for 15 days before data was taken. The Control

Group of 5 trucks was untouched.

Phase 3 – 2/2/06 – 3/31/06 57 Days Data was collected from the 5 Catalyst Group trucks and the 5

Control Group trucks to be compared to baseline data and to each other in this phase.

95 Days of Data Collection – 289,300 Miles

The fuel consumption improvement was 4.59%.

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5.790

5.539

5.474

5.300

5.350

5.400

5.450

5.500

5.550

5.600

5.650

5.700

5.750

5.800

Mpg

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Fleet Results

Fleet Comparison - Lima, Oh

Catalyst Fleet Control Group Fleet Baseline Average

5.116

5.372

4.950

5.000

5.050

5.100

5.150

5.200

5.250

5.300

5.350

5.400

Mpg

Pre-Test Fleet Avg. w/o Catalyst Post-Test Fleet Avg. w/Catalyst

Fleet Results

Fleet Comparison - Lubbock, Tx

Pre-Test Fleet Avg. w/o Catalyst

Post-Test Fleet Avg. w/Catalyst

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Current Exel Cost of Fuel and Estimated Savings through use of the Rentar Fuel Catalyst

Basis of Data:

1) How many miles per truck per year ? 105,000

2) What is the Mpg? 5.47

3) What is the percentage of savings? 4.80%

4) What price per gallon? $2.49

5) What average % fuel price increase? 5%

6) How many trucks? 1,000

Gross Annual Gross Fuel Accumulated Avg. Monthly

Fuel Cost Savings Fuel Savings Savings

Year 1 $47,797,075 $2,270,361 $2,270,361 $189,197

Year 2 $50,186,929 $2,383,879 $4,654,240 $198,657

Year 3 $52,696,275 $2,503,073 $7,157,313 $208,589

Year 4 $55,331,089 $2,628,227 $9,785,540 $219,019

Year 5 $58,097,643 $2,759,638 $12,545,178 $229,070

Note: The results provided in this worksheet are estimates only, actual results may vary.

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Exel/Penske Tests via Llano - Lubbock, Texas

Beginning and Ending Readings

For week 12/05/05 to 01/08/06

Tractor # Begin End Total Total Gallons Mpg

248592 738504 751756 13252 2629 5.041

248594 753383 764745 11362 2114 5.375

248577 669908 684241 14333 2821 5.081

414866 261304 272377 11073 2112 5.243

881596 519029 533424 14395 2975 4.839

64415 5.116

Phase 1 (Pre-Test) Fleet Mpg = 5.116 Mpg

Beginning and Ending Readings

For week 01/22/06 to 02/26/06

Tractor # Begin End Total Total Gallons Mpg

248592 757087 768194 11107 2162 5.137

248594 770583 779119 8536 1484 5.752

248577 691319 705773 14454 2906 4.974

414866 277378 287889 10511 1869 5.624

881596 539472 554403 14931 2778 5.375

59539 5.372

Phase 3 (Post-Test) Fleet Mpg = 5.372 Mpg

*The figures returned from the performance tracking in Lubbock, Tx show

a savings of 5.01% in fuel expenses due to the Rentar Fuel Catalyst.

*See Comparison Chart - Lubbock (bottom tab) for a visual of the

5.01% savings.

Exel/NationaLease Tests - Phase 3 (Post-Test)

Final Data - Catalyst Group/Control Group Fleet

9 Averages - Lima, OH

Beginning and Ending Readings

For Week 02/02/06 - 03/31/06

Catalyst Group Trucks - Phase 3

Tractor # Begin End Total Tot. Gallons Mpg

315911 131258 149024 17766 3046.68 5.831

315913 115177 139172 23995 4238.23 5.662

315914 121897 140810 18913 3287.43 5.753

315915 108049 120287 12238 2031.38 6.024

315926 95513 113042 17529 3085.49 5.681

90441 5.790

Phase 3 (Post-Test) Fleet Mpg = 5.790 Mpg

*5.790 Mpg for the Phase 3 Catalyst Fleet Mpg indicates a savings

of 5.77% in fuel costs when compared w/the baseline.

Control Group Trucks - Phase 3

Tractor # Begin End Total Tot. Gallons Mpg

315903 115565 124791 9226 1657.73 5.565

315904 115002 124165 9163 1647.63 5.561

315906 106627 122796 16169 2988.04 5.411

315907 113665 129462 15797 2802.89 5.636

315910 107363 121914 14551 2635.55 5.521

64906 5.539

Phase 3 (Post-Test) Fleet Mpg = 5.539 Mpg

Exel/NationaLease Tests - Phase 1 (Pre-Test)

Baseline Data - 10 Truck Fleet Average - Lima, OH

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Beginning and Ending Readings

For Week 12/05/05 - 01/15/06

Tractor # Begin End Total Tot. Gallons Mpg

315903 93669 109529 15860 2895.15 5.478

315904 93386 108853 15467 2779.88 5.564

315906 86275 98723 12448 2344.22 5.310

315907 95272 108298 13026 2342.9 5.560

315910 92920 104087 11167 2050.7 5.445

315911 109663 123844 14181 2529.24 5.607

315913 95125 108556 13431 2476.45 5.423

315914 99693 115062 15369 2809.38 5.471

315915 89735 101569 11834 2124.58 5.570

315926 79745 90915 11170 2101.99 5.314

133953 5.474

Phase 1: Baseline Data Fleet Mpg = 5.474 Mpg

*See Comparison Chart - Lima (bottom tab) for a visual of the

savings.

*The above 10 trucks all run on 2005 Cummins ISM engines. Since

the baseline information on both groups was nearly identical, at .11%, or

roughly 1/9th of 1% apart, due to excellent record keeping by Scott Reedy

of Exel, we were able to tabulate the above the baseline based on 133,953

miles travelled.

Control Group Trucks - Phase 1

Tractor # Begin End Total Tot. Gallons Mpg

315903 93669 109529 15860 2895.15 5.478

315904 93386 108853 15467 2779.88 5.564

315906 86275 98723 12448 2344.22 5.310

315907 95272 108298 13026 2342.9 5.560

315910 92920 104087 11167 2050.7 5.445

67968 5.471

Phase 1: Control Group Fleet Mpg = 5.471 Mpg

Pre-Catalyst Group Trucks - Phase 1

11 Tractor # Begin End Total Tot. Gallons Mpg

315911 109663 123844 14181 2529.24 5.607

315913 95125 108556 13431 2476.45 5.423

315914 99693 115062 15369 2809.38 5.471

315915 89735 101569 11834 2124.58 5.570

315926 79745 90915 11170 2101.99 5.314

65985 5.477

Phase 1: Pre-Catalyst Group Fleet Mpg = 5.477 Mpg

*Type IV Study - In this type of study, we see the following to determine

final savings. An increase in the Catalyst Group from the baseline of 5.474

Mpg to a final fleet reading of 5.790 Mpg, which indicates an increase of

5.77%. The Control Group moved from the baseline of 5.474 Mpg to a

final fleet reading of 5.539 Mpg, an increase of 1.18%.

5.77% - 1.18% = 4.59% (Final overall Lima savings in fuel costs).