I run a 75/15/10 (WVO/RUG/DSL) mix during the warmer months in mine. You could run 80/20 but the flashpoint is a little lower than dyno diesel. I wouldn't run any more that 17-18% RUG. Don't run mix if the temps outside at any point drop below 45 deg. F or the fats will separate out and clog your filter.
_________________ GDE FT Ecotune, EHM, Weeks kit stage 1 & 2, Carter 4600 lift pump, Upgraded tranny, Fishing boat hauler! New at 164K: head gasket, rockers, exhaust valves, ARP head studs, Injectors, 5v Bosch glow plugs, water pump, timing everything, serpentine everything, New at 225k: new head, timing belt
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