Ford E-350 Diesel Truck


Final Report on Testing of a Ford E-350 Diesel Truck


This project consisted of Hot 505 emissions testing of a diesel powered truck to determine the effect of the Combustion Technologies Dipetane treated diesel fuel on exhaust emissions of a diesel truck. The truck tested was a 1989 Ford E-350 truck with the 7.3L Diesel Engine, with over 44,377 miles on the odometer (Due to age and apparent condition of the truck it is assumed that this is a roll-over to an actual mileage of at least 144,377). This truck was chosen to represent a typical average-mileage diesel truck in the California market.

A baseline Hot 505 emissions test with standard commercially available California diesel fuel was run at the beginning. Combustion Technologies then took the vehicle away for mileage accumulation with the Dipetane added to standard diesel fuel. After approximately 8,000 miles the vehicle was brought back to the ATDS laboratory for a three Hot 505 test sequence. The fuel used was the tank fuel in the truck upon receipt, presumably California diesel with Dipetane. The test vehicle was run in a chassis dynamometer using Hot 505 test procedure (third phase of an FTP-75 emissions test) to determine the exhaust emissions during the test cycle. Particulate Matter (PM), Total Hydrocarbons (HC), Oxides of Nitrogen (NOx) and Carbon Monoxide (CO) emissions were measured during the test along with Carbon Dioxide (CO2). The software calculates the fuel economy (MPG) of the vehicle based upon the carbon-balance in the exhaust emissions as compared to the total Carbon content of the fuel.

Project Scope

ATDS provided the following services:

  • Conducted a baseline test sequence on the chassis dynamometer using the Hot Start 505 second driving cycle using commercially available California diesel fuel.
  • Conducted three Hot Start 50-5 tests after the completion of 8,000 miles of mileage accumulation.
  • Generated a final report of effects of the treated diesel fuel on exhaust emissions.

Test Result Summary

The table below tabulates the test results for the vehicle.

Ford E-350 with the 7.3 L Diesel Engine

Vehicle 1989 Ford E-350
Engine Test Weight (ETW) 8,250
Odo: 44377 (Probably roll-over 144,377) Test HP (AHP) 19.2
Test Type Date Test ID ODO HC CO NOx CO2 FE PM
Baseline Hot 505 7/10/2002 N2C00711 44377 0.475 1.085 6.984 810.809 12.501 0.217
With Dipetane
#1 Hot 505 8/13/2002 N2C00741 52427 0.289 1.251 5.440 784.813 12.918 0.166
#2 Hot 505 8/13/2002 N2C00742 52442 0.280 1.221 5.551 779.475 13.008 0.158
#3 Hot 505 8/13/2002 N2C00743 52446 0.233 1.218 5.770 777.449 13.044 0.166
Miles Accumulated
Test Variability
Max 0.289 1.251 5.770 784.813 13.044 0.166
Min 0.233 1.218 5.440 777.449 12.918 0.158
Average 0.267 1.230 5.587 780.579 12.990 0.163
Change from Baseline -44% 13% -20% -4% 4% -25%

Product Evaluation

As can be seen from the above table, the results for the gaseous emissions exhibit a significant improvement in the HC, NOx and PM for the 1989 E-350 diesel vehicle between the baseline test and the test conducted after mileage accumulation. The slight increase in CO may be test to test variability unrelated to changes in the test vehicle. The increase in fuel economy is significant for a vehicle of this age and type.