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Your average waste vegetable oil (it varies a bit from soy to canola to peanut, etc...) has about 120,000 BTUs per gallon. Number two diesel has 138,500 BTUs per gallon. That deficit of 18,500 BTUs per gallon of fuel must therefore translate to a loss of power. What that means in terms of horsepower and torque I'm not really sure, but I can attest that over the weekend I was running fully loaded (no major grades though) with 2000lbs in the bed and didn't notice any marked difference like higher RPMs, sluggishness on the highway, or any other sign of power loss.
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GENERAL SHERMAN
2003 F-350 FX4 7.3L
Vegistroke V3
Optima Red Tops
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