# E85 in chev s10

**URL:** <https://community.cartalk.com/t/e85-in-chev-s10/99>\
**Category:** Maintenance/Repairs\
**Created:** [June 1, 2007, 1:14am UTC](https://community.cartalk.com/t/e85-in-chev-s10/99 "2007-06-01T01:14:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![dewayne](https://avatars.discourse-cdn.com/v4/letter/d/ba9def/32.png) [@dewayne](https://community.cartalk.com/u/dewayne)\
**Post date:** [June 1, 2007, 1:14am UTC](https://community.cartalk.com/t/e85-in-chev-s10/99/1 "2007-06-01T01:14:23Z")

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I have a 1999 Chev S10. Will E85 fuel cause any problems with this truck?

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**Author:** ![Doohickie](https://avatars.discourse-cdn.com/v4/letter/d/ecccb3/32.png) [@Doohickie](https://community.cartalk.com/u/Doohickie)\
**Post date:** [June 1, 2007, 1:17am UTC](https://community.cartalk.com/t/e85-in-chev-s10/99/2 "2007-06-01T01:17:30Z")

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Unless your vehicle is specifically designated as a Flex Fuel Vehicle, you CANNOT use E85; it will mess up your engine.

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**Author:** ![jtsanders](https://avatars.discourse-cdn.com/v4/letter/j/c2a13f/32.png) [@jtsanders](https://community.cartalk.com/u/jtsanders)\
**Post date:** [June 3, 2007, 1:31am UTC](https://community.cartalk.com/t/e85-in-chev-s10/99/3 "2007-06-03T01:31:57Z")

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The engine has to be tuned to detonate at the right time. The ethanol content is too high; your electronic control module can’t adjust for the difference. Why would you want to anyway? The mileage is 20% less than gasoline. Is it that much cheaper where you live?