E85 Fuel
Safety Car
Joined: Feb 2016
Posts: 4,406
Likes: 1,374
From: SC
Needs a tune for E85 but if you've got big cams and high compression or boost to take advantage of the octane then it's worthwhile. Many on the internet spread ridiculous ethanol stories but every car made for decades is totally compatible with E10.
Racer
Joined: Oct 2012
Posts: 348
Likes: 28
From: Houston TX
It burns cooler and cleaner than 93 with a much higher octane rating so you can run more timing safely with cooler IATs. This is great for boosted or high compression motors but will show only minor increases in power with normal naturally aspirated street builds. The only down side to E85 is you need about 30% more E85 to make the same power as 93 so this means an upgraded fuel system to support the demand and a loss of 30% of fuel economy. Unless you have an old or carbed vehicle there is no reason to avoid gas with ethanol.
Le Mans Master
Joined: Jun 2013
Posts: 7,024
Likes: 942
From: Colorado
2025 Corvette of the Year Finalist - Unmodified
2024 C8 of the Year Winner - Unmodified
2024 Corvette of the Year Finalist - Unmodified
2023 C7 of the Year Winner - Unmodified
2022 C7 of the Year Finalist - Modified
2020 C7 of the Year Finalist -- Modified
I'll never use it.
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