not quite, close enough.

I run at least 8 oz per tankful. and sometimes 12 oz. depends on my "mood" :)

RB was a little over 1 oz per gallon--at 1 oz per gallon you will smell it . its very obvious. i would not recommend that level with the cat on.
it is all about sealing--not necessarily lubrication in what RB is saying.
i have ran 1 oz per gallon many times(no cat)-not enough there to feel with the butt.
i would advise one day with the pre mix--the next day with the leaded race gas--see which one you like and take the cat OFF!
Remind all--with fi we want the octane and properties leaded race gas bring--when we are on the track or have "special "occasions.:)
dude i posted my vacuum reading in the other thread.
Olddragger