Ethanol!

[airshot]

Well....guess I will add my experiences with E10 fuel....in the early days, I followed the fuel recommendations and changed all the fuel hoses to E10 compatible hose. Cleaned out my fuel systems and started using E10 fuel. The only issues I have had in all these years was caused from buying contaminated fuel to begin with. I did a lot of fuel testing before I was able to find stations that actually sold clean fuel with no water in it ! When I did find poor fuel, I reported it to the station owner then onto the county inspector if the owner did not correct the problem. Did not take long for the word to spread about dirty fuel. The local farmers group started a co op station for bothering gas and diesel including E0 fuels. I have never found contaminated fuel there nor has anyone else. We have a few old car collecters that come in and use the fuels at this station just because they know the fuel is good. My neighbor is one of those collecters, he has a dozen old Mopar high performance vehicles, including the 440 Magnum, Super Bird, Road Runner and other of that caliber. He and I have been using E 10 fuels for decades, never an issue as long as we treat it on purchase.
The cost of treating the fuel is cheaper than paying and extra fifty cents a gallon or more for the E0 fuel, and even that should be treated as it will go bad over time. I was a mechanic back in the later 60's and 70's and cleaning gunk out of carbs and treating fuels with " gumout" was very popular. When the E 10 fuels came out, the local drag racers were fighting to get it as their cars ran better and faster with it....your money, spend it now you like, but if your buying E10 and have an issue, look deeper than just blaming it on the E 10 gasoline itself.

 

[JimS123]

Well....guess I will add my experiences with E10 fuel....in the early days, I followed the fuel recommendations and changed all the fuel hoses to E10 compatible hose. Cleaned out my fuel systems and started using E10 fuel. The only issues I have had in all these years was caused from buying contaminated fuel to begin with. I did a lot of fuel testing before I was able to find stations that actually sold clean fuel with no water in it ! When I did find poor fuel, I reported it to the station owner then onto the county inspector if the owner did not correct the problem. Did not take long for the word to spread about dirty fuel. The local farmers group started a co op station for bothering gas and diesel including E0 fuels. I have never found contaminated fuel there nor has anyone else. We have a few old car collecters that come in and use the fuels at this station just because they know the fuel is good. My neighbor is one of those collecters, he has a dozen old Mopar high performance vehicles, including the 440 Magnum, Super Bird, Road Runner and other of that caliber. He and I have been using E 10 fuels for decades, never an issue as long as we treat it on purchase.
The cost of treating the fuel is cheaper than paying and extra fifty cents a gallon or more for the E0 fuel, and even that should be treated as it will go bad over time. I was a mechanic back in the later 60's and 70's and cleaning gunk out of carbs and treating fuels with " gumout" was very popular. When the E 10 fuels came out, the local drag racers were fighting to get it as their cars ran better and faster with it....your money, spend it now you like, but if your buying E10 and have an issue, look deeper than just blaming it on the E 10 gasoline itself.

E10 is a big boon. When a mechanic can't figure out what the problem is (was), now he has something to blame. Lots of reading to be had if you google the myths of ethanol.

My old 1980 Ponch has been running on E10 since it was first available. Never had a carb problem. My 1952 'Rude Big Twin has also had good luck, though the fuel lines and carb have been replaced with ethanol resistant parts.

A few years ago a Consumer Advocate group quietly did a survey of a number of different gas stations. They took samples and had a lab analyze them. E0 ranged from 0% ethanol up to about 10%. E10 ranged from 0% to about 15. It's obvious that you never know what you might get. I don't know if things have improved or not.

To follow-up on my original post.....I drained the tank and refilled it with E0. ($5.19 a gallon was a hard pill to swallow - fortunately the tank is only 0.3 gallons). I will add Seafoam to the mix as well.

Unfortunately, Summer is waning and I don't expect to get time for much running any more. I suspect my root cause is lack of use, but that has to do with the motor's purpose. It's a 2016 and has about 7 hours on the clock.

Thanks to all for the replies.

 

[matt167]

I run 90-93 Ethanol free in my ‘51 Plymouth for 2 reasons, the fuel pump and the carburetor. The engine itself would run on 70 octane and be happy but it’s a pretty original car and I’m not sure if the fuel pump or carburetor have been rebuilt ethanol compliant so it’s cheap insurance to pay $1 more per gallon for the 2-300 miles I might drive it per year.. everything else I have gets 87 unless it needs higher octane. Never an issue.
Everything gets stabilized

 

[ratdude747]

I run E10 during the season and E0 on the last fill up or two at the end of the season for winter storage. My Mercruiser 888 is spec'd for Leaded 88... so I usually add a gallon or two of premium (93) and the rest regular (87) when running E10. The E0 I can get is all 90 octane, so it's good to use straight. I used to run lead substitute every 3rd fill up but I gave up on it figuring what I can get is likely $8 snake oil.

I'll note that I run my boat on a 2-3 weekend gap... I'd be comfortable letting it go up to 5-6 weeks with E-10 sitting (after that, the absorbed water becomes a corrosion hazard). All rubber fuel lines have been replaced and the carb (not stock, see my signature) was recently rebuilt as well. The pump is stock (to my knowledge), but they've been using butyl rubber for pump diaphragms since the early 70's which is compatible with ethanol.

10% ethanol is good for 3 AKI of Octane... which why E0 90 usually costs as much a E10 93. Same base fuel...