Originally posted by 98 SE:
Originally posted by powerx_32:
Thanks for replies.
Unfortunatelly i do not have SVT but 1998 Duratec V6 2.5
I had heard before on here that using the higher octane on engines not designed for it actually reduces your fuel economy and engine performance ... anyone wish to confirm/elaborate?
I've heard the same thing as you, I learned/heard it in a class I took in college, it was a small engines class, so it could be true.
Jason G.
1997 Mercury Mystique GS ZETEC ATX
Born: 11/96
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