Quote:
Originally Posted by Verdoro 68
Valvoline VR1 + STP oil treatment for some extra ZDDP.
Pump 91, sometimes cut with 110 or Race Gas additive when I'm going to drive the car hard.
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I use Valvoline 10W-30 in the 68 GTO, the 70 Mach1 and the 84 F150 with a can of STP for each. The 2011 F150 gets Pennzoil 5W-30 Synthetic, or synthetic blend.
Only fuel additive is STP injector cleaner once a year.