Unless it Torco dont use it. Any other additive that I have tried/heard of, will leave a residue/buildup on the plugs. After prolonged use can cause misfires.
Lethal Performance O/R xpipe and duel pump fuel return style system, frpp 47lbs injectors, Vortech with 3.48 pulley, Boss heads/Cams, Aluminum Driveshaft, frpp 3.31 gears. pypes pypebomb cat back, mgw shifter. jlt intake, boss 302 intake manifold. bbk 85mm tb.
11.4@130 1/4 at a 3700 DA. (2.0 60ft)
721hp/525tq (tuned by Seminole Automotive Performance)