E15?

[BaliMawr]

So, a buddy of mine with a lead foot and a manual in his '21 2 door wrangler(jk?) Put a tank of E15 from Sheetz in his Jeep and his fuel economy went UP by 2 mpg. I saw it myself. He usually gets like 14-16 mpg (stock), and he was running 18-19 with that stuff. My local station sells it; I think Im going to give it a go on my next road trip, just to be sure not to let it sit.

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[ShadowsPapa]

So, a buddy of mine with a lead foot and a manual in his '21 2 door wrangler(jk?) Put a tank of E15 from Sheetz in his Jeep and his fuel economy went UP by 2 mpg. I saw it myself. He usually gets like 14-16 mpg (stock), and he was running 18-19 with that stuff. My local station sells it; I think Im going to give it a go on my next road trip, just to be sure not to let it sit.

Interesting enough - I've been using U88 (15%) and I have been driving it off and on the last few days - using gas before they get it this week as trade for the new one, and I was watching today and wondering what the heck - same routes I always drive, same speeds (wife wa with me) and I saw just a little bit better than it has been........ and in my head I realize it matches my experience with this truck last time I used U88.
This thing actually does just as good, maybe better but because air temp, humidity, etc. can have an impact too, all I can really say is it's no worse at all, and it runs as well as ever.
Towing it does better.

But then my Chevy pulled better on the hills and the mpg was only a little bit less when I used E85 in it. I could feel the better HP and the book even said the rating was higher with E85 in that truck.

The only real issue with ethanol is evaporation, and it does pull moisture. And it's the moisture that it absorbs that is the problem, not the fuel itself.
You lose the light parts through evaporation.
If the container is sealed, it's not a problem. I've had sealed cans of gas here for weeks, at times, 3 or 4 months, no issues.

Tests done at ISU showed no appreciable difference in mpg between 10 and 15%.
I've found some, like this truck, not only handle it fine, but actually do a bit better on the 15%. I definitely do not get less mpg.

I have not run pure gas in a car for longer than I can remember although on my SX4 I have gone to switching back and forth because the fill tube on it is 1982 rubber and irreplaceable. Nothing else used that same fill tube, it was unique to a car made for 3 years in very limited numbers.
Otherwise I'd say big deal because it takes only about 15 minutes to change it if a person could buy new ones.

 

[CerOf]

So, a buddy of mine with a lead foot and a manual in his '21 2 door wrangler(jk?) Put a tank of E15 from Sheetz in his Jeep and his fuel economy went UP by 2 mpg. I saw it myself. He usually gets like 14-16 mpg (stock), and he was running 18-19 with that stuff. My local station sells it; I think Im going to give it a go on my next road trip, just to be sure not to let it sit.

I could see that in the summer when it’s hotter. I believe the engine will pull timing ifmit detects any pinging; or perhaps, if certain heat parameters are met.

The ethanol will keep things as smidge cooler and allow the engine to keep timing at the best/optimal amount?

Just thinking out loud.

 

[BaliMawr]

I could see that in the summer when it’s hotter. I believe the engine will pull timing ifmit detects any pinging; or perhaps, if certain heat parameters are met.

The ethanol will keep things as smidge cooler and allow the engine to keep timing at the best/optimal amount?

Just thinking out loud.

That’s interesting. He doesn’t have easy access to the stuff where he is, but I’ll be experimenting with it. It’ll be interesting to see what happens as the weather gets cooler. You know… in October.

 

[NachoRuby]

That’s interesting. He doesn’t have easy access to the stuff where he is, but I’ll be experimenting with it. It’ll be interesting to see what happens as the weather gets cooler. You know… in October.

I run it year round. Certainly, mpgs are better in summer, but not awful in winter. E15 is readily available here in PA, so it's all I use, because it is $.70 less per gallon at current. I have a slightly lifted Rubicon on 35s. I get 18 mpg right now combined, 16.5-17 mpg in the winter, and about 20 mpg on the highway. When I was 100% stock, I got about +1 mpg in every scenario on e15.

Whenever I travel, and can't get e15, gas mileage on regular 87 is about the same. I don't really notice a difference in any way, but e15 is 15% cheaper, so I run it all the time as long as I can find it.

 

[vegajf]

I have run a couple of tanks of e15 just for the hell of it and I have noticed absolutely zero difference in mpg. I thought I would see a small drop but nope. Plan to keep using it as it is cheaper.

 

[Rusty PW]

All new engines have knock sensors. The ecu will increase timing until it sensors knock and then back off a little. Because E15 has a higher octane rating. The engine will produce more power, with a slight decrease in mileage. Even more power with E85.

My 3.7 twin turbo Nismo will make 609 HP on a 93 octane tune. On E85 which had around 104 octane. I make 716 HP. But I have to run 2 fuel pumps. On 93 running around. I get about 360 miles per tank. On E85, that drops to around 260.

I have a couple of friends making over 1000 HP with the 3.7 on corn.

Another thing. Stations don't always have pure E85. It's got other gasolines mixed with it from shipping. So the percentage could be low as 60%. My ethenol sensor has shown a low of 70% on one fill up.

I run 93 mostly. Unless I'm showing off. I like my head gaskets and rods to stay in place. When I'm running corn. I do my oil changes at 2000 miles. The oil smells like the car is an alcoholic.

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