Ethanol free gas gas mileage.

I've a FFV 17 CM with a TRD dual exaust and TRD intake and since I've bought the truck I've only used ethanol free gas. I average 350 miles per tank (26 gallons) when the gas light comes on. I drive very conservatively. Ethanol free is quite expensive compared to the one with ethanol.
I would like to compare other people gas mileage that are using gas with ethanol in it and that have set up similar to mine. Thanks.

 

I use 87 E10. My commute is about 85% IH and I average 17-18 in normal temps. Round trip is about 60 miles daily. I have a Flowmaster Special 50 dual outlet. Intake is stock. I run ethanol free in boat, lawn equip, and ATV. Not worth the $.40 diff/gallon in a vehicle designed to run on ethanol. Boat is set up and runs fine on e10 but it has a 95 gallon tank and I try to time the market at low points and buy 40 gallons at a time. Gas can sit in tank for a few months unlike truck.

 

I've tried both in my rig - never noticed much of a difference in mpg between the two. Definitely not enough difference to warrant the higher price and driving way out of my way to get the ethanol-free stuff.

 

I run non-ethanol 93 (higher oct required for super charger) most of the time because its conveniently available in my town. When I'm traveling I fill up with the mixed 93, since its difficult to find non ethanol 93 in most places, and my hand calculated difference is usually around 1-2 mpg. So its worth the extra five or six bucks per 30 gallon fill up for me to get an extra 60 miles or so between fill ups. Plus I feel like its better for my engine's innards to minimize the veggie gas even though its "made to burn it".

 

I have an SC so I have to run 92+ octane in the truck at all times and try to get ethanol free fuel when I can. I do notice a slight uptick in mileage with the ethanol free fuel, as much as 10%.

 

So I've ran it in my previous 2011 CM 2wd, my current 2017 CM FFV 4wd, as well as my wife's previous 2012 Acura TL and her current 2019 Honda Odyssey. First, it is somewhat difficult to find around here as I have only located about 2-3 stations close to me that carry it. In all of the vehicles, I would notice about 1-2 mpg regular jump. On long trips where I have to purchase ethanol gas in different areas, I would notice as much as 3 or even 4 mpg increase between them. Now that the price has been basically about $.40-$.50 higher, it doesn't benefit me to go find it and get it since the cost/mileage difference is exceeded by the ethanol infused gas. Now as mentioned above, I do chase it down every month or so to top of my tanks for my power equip like mowers, trimmers, etc. Not to mention, now we are having alot of construction in our area and are sitting still on interstates often for the next year to 2....so I'm not gonna pay premium $$$ to just sit and burn it off when my mileage is just going to crap anyway. I do feel like it is a bit more responsive as well when I run non ethanol, but that's strictly butt dyno, and have no actual proof if it runs better. Also, I run 87 octane always (except on my wife's TL when she had it, ran 91+). Hope that helps a lil bit bud

 

Good info - thanks for the thread & discussion!

 

Way too many factors come into play that you really just need to do this test yourself. Drive your regular routes for a month with E10 gas and compare to what you're getting with E0.

But I can tell you it's basically gonna be a wash. I don't really understand the fascination with so many Tundra owners trying to eek out every last possible tenth of a mpg.

Gas is extremely cheap relative to the cost of these $40k trucks. There are smarter ways to spend your time if you're trying to figure out ways to maximize your finances and expenses.

 

If you pick up even .1 or .2 miles running 87UNL instead of 87e10 I would be surprised....

I have tested it in my truck and not picked up anything. I have also ran 93UNL and 93e10 and have seen no difference in mileage. I have Dirty Deeds 8" and TRD intake.

On our stock engines you will not see any difference to substantiate the cost of going premium.

 

So is your logic that 89 is better gas? If so it is not valid. I guess since you don't drive a lot you are wasting less money.

 

You get to be surprised today. I ran 87 non ethanol in my 2017 5.7L 4wd FFV and would get upper mid/upper 16mpg to low 17mpg. In ethanol gas(up to 10%) I would get lower/mid 15s to low 16s. Ran exclusively non ethanol for first year or so of having truck. When I dropped to ethanol gas in 87 octane, it dropped. Same type of driving and all. I quit using it because the fuel mileage difference didn't make up for the price difference when it went up. I did the math, and it didn't benefit anymore. I won't run 85 in my truck though as long as I have a choice.