# Ethanol Content in Gasoline **URL:** \ **Category:** General Discussion\ **Tags:** chevrolet, silverado1500\ **Created:** [April 10, 2012, 7:42pm UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863 "2012-04-10T19:42:40Z")\ **Posts on this page:** 14\ **Page:** 5
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [May 11, 2026, 12:38am UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/81 "2026-05-11T00:38:14Z")
Around 1985 the lead content in leaded gasoline was reduced to 10% of the previous standard. The sale of leaded gasoline was discontinued 4 to 5 years later. Ethanol was already in use at that time but less publicized. In the late 1970’s, gasoline w/ethanol was advertised as “Gasohol”. In my area E10 was the mandatory winter fuel supply in the late 1980’s. ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [May 11, 2026, 12:42am UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/82 "2026-05-11T00:42:26Z")
I have no evidence either way and never checked mileage. It just seemed like the needle was moving downward faster that normal. Plus co-op is a farmer owned organization, so no franchise to lose. They can do what they want. I can’t say that Minnesota required it. Maybe but never noticed it before. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [May 11, 2026, 2:26am UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/83 "2026-05-11T02:26:49Z")
The ethanol bogeyman has been around for at least 45 years. A page from a 1981 Chrysler owner’s manual regarding Gasohol/ethanol; ![scan20260511015834](https://global.discourse-cdn.com/cartalk/original/3X/d/f/df383daea905c88d87845f04b236c4fe4e64bd3e.jpeg) 1989 Dodge owner’s manual; ![scan20260511020047](https://global.discourse-cdn.com/cartalk/original/3X/6/4/6440c2572ad0d32b659eb5746a3d21fe515d71f7.jpeg) ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [May 11, 2026, 5:56am UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/84 "2026-05-11T05:56:27Z")
Here’s my question on going over 10% - why do it? Ignoring potential issues with the fuel system, I still see no benefit. Lost fuel economy is the major result. I bet few stock street engines can take advantage of the increased octane. ---
**Author:** ![glasspilot](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/glasspilot/32/27886_2.png) [@glasspilot](https://community.cartalk.com/u/glasspilot)\ **Post date:** [May 11, 2026, 1:21pm UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/85 "2026-05-11T13:21:01Z")
All I know is both my more modern vehicles say in the manual: “Do not use gasoline with more than 10% ethanol.” 2017 Chevy Volt and a 2006 Harley Electra Glide. I am not going to use E15 in those vehicles. Now, I do own an old 1975 Suzuki motorcycle (GT750) that was designed way before E10 gas came out. Only Non-ethanol in that bike. ---
**Author:** ![davesmopar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/davesmopar/32/41750_2.png) [@davesmopar](https://community.cartalk.com/u/davesmopar)\ **Post date:** [May 11, 2026, 5:51pm UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/86 "2026-05-11T17:51:31Z")
Here is a page from my Toyota truck… ![image](https://global.discourse-cdn.com/cartalk/original/3X/e/f/ef436106e688e71e9a8f4bdbd45cba275235d725.png) ---
**Author:** ![jtsanders](https://avatars.discourse-cdn.com/v4/letter/j/c2a13f/32.png) [@jtsanders](https://community.cartalk.com/u/jtsanders)\ **Post date:** [May 11, 2026, 7:51pm UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/87 "2026-05-11T19:51:49Z")
I’m not familiar with MMT. Where in the US is it used? I read the Wikipedia article and while it said that the EPA allows usage, several car manufacturers won’t underwrite performance of their vehicles if MMT treated gas is used. That’s in addition to the Toyota warning that @davesmopar posted. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [May 11, 2026, 7:57pm UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/88 "2026-05-11T19:57:33Z")
> [@glasspilot](#): > > both my more modern vehicles say in the manual: “Do not use gasoline with more than 10% ethanol.” 2017 Chevy Volt and a 2006 Harley Electra Glide. Those vehicles were emissions certified using up to 10% ethanol blend. In the early 2020’s vehicle manufactures made the necessary software adjustments for E15. ![20220616154756](https://global.discourse-cdn.com/cartalk/original/3X/5/6/5605088442bd58572abf0f773095a78efe0c743c.jpeg) ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [May 11, 2026, 8:08pm UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/89 "2026-05-11T20:08:10Z")
Well that explains it. Didn’t realize e85 is 85% ethanol. ---
**Author:** ![daveclough\_196622](https://avatars.discourse-cdn.com/v4/letter/d/ecb155/32.png) [@daveclough\_196622](https://community.cartalk.com/u/daveclough_196622)\ **Post date:** [May 13, 2026, 11:04am UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/90 "2026-05-13T11:04:28Z")
When I first started driving I could buy unleaded, leaded, or 10 percent ethanol unleaded.. ---
**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\ **Post date:** [May 13, 2026, 1:17pm UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/91 "2026-05-13T13:17:12Z")
> [@texases](#): > > Here’s my question on going over 10% - why do it? Ignoring potential issues with the fuel system, I still see no benefit. There are a number of supposed benefits along with the cons: - Higher octane rating allows for higher compression engines which should produce more power - It burns cleaner than gasoline - It’s a renewable resource - It’s a solvent and so helps to reduce deposits on engine components - Domestic energy production ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [May 13, 2026, 5:15pm UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/92 "2026-05-13T17:15:33Z")
In Sioux Falls when they had a price war, I could fill my VW up at 19 cents a gallon. So a full tank at less than $2. For years though normal price was $0.32.9. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [May 13, 2026, 5:27pm UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/93 "2026-05-13T17:27:20Z")
You filled your Volkswagen fuel tank with E10? Did you post this in the correct thread? ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [May 13, 2026, 7:37pm UTC](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863/94 "2026-05-13T19:37:41Z")
Nope, 1968 before they invented e10, but you knew that. [Previous page](https://community.cartalk.com/t/ethanol-content-in-gasoline/71863.md?page=4)