VEGGIE VS. DIESEL
Using waste vegetable oil in diesel cars and trucks is nothing new. People have been doing it for years to save money and reduce their fuel bills. Many people enjoy the french fry smell in the exhaust, but wonder if they are leaving any power on the table compared to standard #2 diesel fuel. While Matt Ford’s truck was strapped to the BDP dyno we decided to find out.
With the factory tune in the truck the horsepower and torque curves we measured were very similar, with the veggie runs falling slightly behind the #2 fuel dyno pulls. The small difference of about 5 hp and 20 lb-ft of torque would be difficult to notice on the street. When the performance envelope was pushed with the BDP hot tune, the difference between the two fuels in performance applications really came to light.
Granted, the hot tune on veggie fuel picked up nearly 100 hp over the factory tune on veggie and was only 27.2 hp less than the same tune on diesel fuel. While the peaks are similar, the power and torque curves measured across the rpm band clearly show that diesel fuel is much better at making more power in the higher rpm ranges and suffers far less drop off than the veggie oil fuel.
Don’t get us wrong—we’re not saying that waste vegetable oil fuels are not good or that they don’t make power. We are simply showing you that plain old reliable #2 diesel makes more power and does it over a wider rpm range than the WVO with a performance tune. So on those days when you are shooting for maximum mpg, leave the switch in the WVO mode. But if you want to win that drag race, even if it is just to the next stoplight, switch it back to #2 diesel fuel!
But burning standard #2 diesel fuel the truck made great power with the BDP hot tune.
Burning waste vegetable oil the truck made good power using the BDP hot tune.