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Old 09-27-2012, 11:13 PM
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oldhp oldhp is offline
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I have used the following with zero difference in mileage or driveability.
BP 87
BP89
Shell 87
Shell 89
Phillips 66 87
phillips 66 89
Caseys 87
Caseys 89
I don't tow or haul anything. I'm getting right at, and once over 20 MPG.

To the original poster; If you know your going to pull something push the TOW/HAUL button and go. I would just use TOP TIER fuel and be done with it.
As I posted before Ma Mopar tech said they assumed 89 octane had more detergents so thats why they "preferred" the 89 stuff to keep engine cleaner inside. I believe them.
Just my 2 cents.
oldhp
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