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Re: 91 octane gas and the money in my pocket
Posted by john b (more from john b) on Sun, 24 Aug 2008 20:19:36
In Reply to: 91 octane gas and the money in my pocket, bender
[Profile/Gallery]
, Sun, 24 Aug 2008 12:38:06
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In the warmer months it won't save you anything because the engine management system will just retard the timing more to prevent detonation, causing you to lose mpg. I consistently lose 2mpg in hotter weather if I fill with plus instead of premium. That is a greater percentage loss that I save from lower octane. Just tested my theory again on a 2400 mi trip to Colorado in hot weather and it was consistent. In the colder months I hear the 87 works better but haven't tried it.
posted by 75.26.19...
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