astronut1885
Founding Member
The 4.6L 3V can also adjust timing based on octane. God I love people spreading misinformation like fact.
The 4.6L 3V can also adjust timing based on octane. God I love people spreading misinformation like fact.
2008 owner's manual:
Octane recommendations
Your vehicle is designed to use
“Regular” unleaded gasoline with
pump (R+M)/2 octane rating of 87.
We do not recommend the use of
gasolines labeled as “Regular” that
are sold with octane ratings of 86 or lower in high altitude areas.
Do not be concerned if your engine sometimes knocks lightly. However, if
it knocks heavily under most driving conditions while you are using fuel
with the recommended octane rating, see your authorized dealer to
prevent any engine damage.
Octane recommendations (Bullitt™* Mustang only)
Your vehicle will run normally on 87 octane regular fuel without
damaging the engine, but premium fuel with an octane rating of 91
(R+M)/2 or higher is recommended for best overall performance.
* ™ & Warner Bros. Entertainment Inc. (s07)
My 08GT said the same, minimum 87....any mention of higher octane fuel use?
the placebo effect is always good for 10 or 20 hp...