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Go Back   Hummer Forums by Elcova > Hummer H3 Discussion Forums > Technical Discussion and Customizing your H3

View Poll Results: I was wondering about fuel...Recommended is 87%.What is the majority using. Thank you
87% unleaded 66 85.71%
89% unleaded 5 6.49%
90% unleaded 1 1.30%
or better 5 6.49%
Voters: 77. You may not vote on this poll

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Old 02-26-2006, 08:37 PM
CampMaster CampMaster is offline
 
Join Date: Feb 2006
Location: M.N.D.
Posts: 416
CampMaster is off the scale
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Use what's recommended. Anything more is a waste.

The enigine is designed to run best at a certain octane level... 87 for the H3. The H3 can run on a higher octane, it just won't get any additional bennifit from it.

The more important thing to consider is the quality of the gas. Some stations sell cheap gas which may have a high water content or other contamenants. See which station/gas company sells rhe best quality 87 octane gas. You may need to run a couple tanks of it to clean out what the others have left behind.

Has anyone looked into the optimum level of ethynol for the H3? Most stations out here put ethynol in the gas for certain seasons. I see that GM is putting out a new motor which can run on over 80% ethynol.
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