Originally Posted by ford302ize
Hi I just got a 14' GT last Friday and would like to know what fuel octane I should use for the first 1,000 miles. The owners manual says that 87 is recommended, but in extreme temperatures or high performance driving 91 should be used. Which one should I use?
With the break in of an engine I've always heard to take it easy and lug the motor a bit, not really any high rpm drives, and I would say 87 would've good for the break in. After that if you wanted to switch to 91 it would be good