CleanSump
Site Donor 2026
If it's running fine I'd just burn it down to half a tank or less, fill with regular and carry on like it didn't happen.
Is E15 Gas safe in a 2001 Blazer?
- Thread starter FTTSHO
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Mine isn't, I wouldn't have stated my observation if it could run E85. Don't remember if the 800s ran E85 or at least had that little flex fuel badge, but I know the 900s did. From what I know any flex fuel vehicle automatically gets worse mpg as I remember GM reducing the MPG by 1 and even 2 even if you had the same engine displacement, differential, drivetrain, and everything else because of the different injector design that is inherently less efficient at atomizing when youre running e10 or lower as you need to spray less fuel with it. Also, I can't remember if I've ever seen these new GM trucks advertise flex fuel, such as the 2019 or newer Sierra Silverados or 21 Tahoe, Yukon and such. EPA regulations are so strict they can't take the mpg hit from the injectors E85 needs
Like I said, it's not going to melt down like Chernobyl, it will just speed up the process. Ive gone through tons of fuel system parts on motorcycles and watercraft because of ethanol fuel. The work fine for a while but need parts replaced much faster.
I've seen many references that it "may" void the warranty. That means something vs "will void". Plus, it would be pretty hard to prove (just dilute the fuel with 0% to 10% ethanol), presuming they even check.
"recommend" is a weak word when it comes to warranties.
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I'm in South Carolina and as I was doing my rounds today 5/2/26, I looked close at a few gas pumps and all I seen in my specific area still say up to 10% ethanol and I see nothing labeled 15%, So with this up to 15% TRUMP waver will that little "ethanol up to % " sticker be required to be changed showing 15%?
I'm no lawyer but I would think if a pump says up to 10% it better stay under 10% or 7-11 could be on the hook for boat, lawn mower, car damage? I wonder how that works with a President order?
I walked into a Murphy today as the tanker truck was filling the tanks ( wish I had asked the driver ) I did ask the manager about E15 and she said she had heard what we heard in the news but she looked at her clip board and said she has had no notice anything would be changing for whatever thats worth.
My local 7-11 branded gas pump and Exxon as of today still only shows up to 10% ethanol, My 7-11 also sells 90 octane E00.
Worse case I have this one old looking, seen better days ethanol free 93 octane pump kinda hidden away on the back side of the building with the Big Rig Diesel pumps, not in view of the normal gas pumps and is NOT listed on the https://www.pure-gas.org website and zero signs on the building even suggesting this pure 93 is still around, so its kinda a secret few know about.
I do worry about being old gas / water etc but I have used it every week in my motorcycles, mowers etc and never had a bad tank the last 3-4 year. This gas runs... well... GREAT like Pure Gasoline 93 ran 15 years ago before any of this Corn BS!
Best I can tell THIS one 93 E00 is one of only (3) 93 octane pure gas pumps in my 2 County area and is about 4-5 miles from the house.
Shame its so hard to simply buy good, pure gas in 2026.
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AAA did a broad view of the situation back in 2012 & pointed out where it would void it on some manufacturers warranty. I'm all for corn fuel personally but at the $0.10 discount, I get over 87 octane, I just decided to quit using it on a regular basis. If I owned a Prius or something it would be more cost effective. Obviously, 2001 S10 Blazer is well out of warranty but still should be taken at face value if the OEM wouldn't back it up if it were the case.
I seriously doubt it would hurt anything. A friend at work has been running Sheetz 88 octane E-15 for years now in a 1997 F150 with a 5.4 simply due to cost. Zero issues
Back in 2019, I used unleaded 88 (E15) from Sheetz while driving down to Florida. We were driving through Fayetteville, WV on RT-19, and it was the first time seeing it. I topped up my 2007 Maxima, but remember hesitating before doing it because I was down to a 1/4 of a tank; it ran just fine.
So the short answer is yes.
So the short answer is yes.
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Pretty sure the first time I saw E15 or unleaded 88 was at a Sheetz in the Carolinas on the way to/from Myrtle Beach. I admit, I wasn't familiar with it enough at that moment to use it, but afterwards, I researched it and figured out what it was. After that, I'm all for it, depending on the car. I tell our daughter to use in our '12 Civic to save money and have told my wife she can use it on our '24 Grand Highlander (she gets gas at Sam's Club mostly though).
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Late to this thread, but my personal understanding is that this was a blanket statement from when your options were generally E10 or E85 (51-83% ethanol). It's simple language that avoids any sort of misunderstanding.
For my 2021 BMW, the paper owner's manual that came with the car has the same statement, but if you download the owner's manual for the same car online (this online version including the latest revisions), it states that anything up to 25% ethanol is fine.
Any car that can safely handle E10 can do so with E15. It is merely a 2% difference in the fuel needed to achieve the target AFR with a 5% increase in ethanol content. In my opinion anyone complaining about running issues with E15 is running poor quality fuel, has other issues with their car, or is a victim of the placebo effect...
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Any station that sells E15 from a pump marked E10 would be in violation of the Clean Air Act, so yes, it would have to change.
But at the end of the day, the equipment and certification is cost-prohibitive for existing gas stations to sell E15 fuels, which is why most of the stations offering it were seemingly built within the past 5-10 years. Nothing's going to change. I live in corn country where E85 is very common but the only stations with E15 are Sheetz built within the past three years.
The EPA waiver is just a continuation of the status quo. Unsure of why this one was such big news, similar ones have been issued every year for several years now - all accessible on the EPA website.
Do they even sell E-85 anymore? I've yet to see a pump that has it. Or is it only available in California, where the air is pure until the houses burn?
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I often wonder about E85's place in the world these days. Feels like Flex-Fuel cars were mostly a 2000s fad. Plenty of E85 pumps here in the Midwest (the four closest gas stations to my house have it), but I haven't seen a yellow pump handle in a car here in years.
When I lived in Phoenix, E85 was practically non-existent. There was one station that had a reputation for selling consistently "hot" E85 (often 95% ethanol or more) and there was often a car or two ahead of me in line for that particular pump. They did charge about the same as 91 so very expensive, but for the borderline race gas you were getting, it was quite a bargain and people knew it.
I do wonder if they ever ran into legal hurdles flowing E90+ from an E85 (51-83%) marked pump. Hope they didn't, it seemed to bring good business and everyone filling up there obviously knew the deal.
It's not uncommon around here, though only certain chains (not small ones either) tend to offer it. I don't seem to see it at grocery store gas stations (i.e. Kroger) or places like Speedway, Shell, etc. The regional convenience stores have it though - Sheetz, Casey's.
Flex fuel vehicles have stainless steel fuel lines, a fuel filter without glue in it and injectors with stainless steel internals. All to deal with the Ethanol content.
What year ranger?
My older but 1993+ vehicles would all run up to e50 just fine, beyond that you get a trim cel.
A guy did extensive testing on a old Prius on priuschat testing exactly what each ethanol percentage did.
I have a vehicle that requires E80 or better, it is not flex fuel, I load a different tune to run E85. I always test it before I use it, there are only 2 stations around here that have it. I have tested E90 once but usually it is more E81/82. Oddly, one of the stations seems to switch to a winter blend (E65) and the other doesn't but the volume is so low that it takes half the summer for the winter blend station to get back above E80. If I ever get any that tests low then it gets dumped into one of our flex fuel vehicles.
2000 2.5
Unless GM has guidance that it's okay to use in your old Blazer I'd avoid E15.
As others have noted using once in a pinch is unlikely to cause any problems that might occur if you gave it to the Blazer as a steady diet.
From a quick but by no means exhaustive search, it would appear that GM recommends the use of E15 only for those vehicles built after 2012, excluding earlier flex fuel vehicles.
Therefore, you probably shouldn't be feeding your Blazer a steady diet of E15, but an occasional tank shouldn't do any harm.
EPA may say that any four wheel road vehicle from 2001 forward is okay on E15 but I have no idea where EPA pulled that bit of wisdom from and would not rely upon it.
As others have noted using once in a pinch is unlikely to cause any problems that might occur if you gave it to the Blazer as a steady diet.
From a quick but by no means exhaustive search, it would appear that GM recommends the use of E15 only for those vehicles built after 2012, excluding earlier flex fuel vehicles.
Therefore, you probably shouldn't be feeding your Blazer a steady diet of E15, but an occasional tank shouldn't do any harm.
EPA may say that any four wheel road vehicle from 2001 forward is okay on E15 but I have no idea where EPA pulled that bit of wisdom from and would not rely upon it.
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