Anyone using any fuel additives out there? I am a bit suss on the "premium" fuel here, Anyone using any octane boosters? I was thinking about mixing some toluene with my fuel just to make sure no pre-detonation happens. Not really looking for a nitro boost or anything! Also anyone using valve saver fuel additive? Motorex makes some, is it worth it or not??? Is it just the same stuff as lead replacement additive?