Thread: Fuel You Use
View Single Post
  #14 (permalink)  
Old 01-24-2010, 03:05 PM
Larry Spillman Larry Spillman is offline
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2010
Location: so san francisco, ca
Cobra Make, Engine: NAF 1965 427 bodied w/Clevland 351 bored 60 over toploader 4 speed White and grey stripes
Posts: 62
Not Ranked     
Default
If you mix regular and hightest you get a higher octane rating than 91 plus add some octane booster and you should be fine a plug read will tell you a lot about your engine performance.
Reply With Quote