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Recent content by Jonsofjons
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Better MPG with higher octane?
Personally on my 5.7l rebel I have noticed a 3mpg when using 89 over 87. Highway driving I use to get near the 20mpg and when using 87 I struggle to get 17mpg. Idk if it’s because I am in the high miles (190k)- Jonsofjons
- Post #111
- Forum: 5.7 Hemi V8