E88 gasoline also known as E15, at 70 cents less per gal

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benjaj

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Just a little caution for statements like this, If your Ram Hemi 5.7 manual says you can only go up to 10% ethanol, you can have your warranty voided by your dealer for using E15 with 88 octane. Especially if it is related to degraded fuel system components from using higher alcohol percentage than allowed by the warranty. Regardless of whether it is designed to use it or not.

Warranty already expired? Do as you want.
There is certainly some knit-pick warranty risk.

My guess is 10% vs. 15% ethanol content in fuel is the least of the worries. Frankly, I'm unsure how this would be able to be detected by a dealer if a claim were to be contested. Additionally, I suspect a rather high percentage of the dudes on this forum already have aftermarket (oversized) tires and may not ALWAYS "Ultra" 0w40 for their 6.4L (many forum posts on THAT topic). These actions are far more detectable to a dealer seeking to get out of a warranty claim.
I would also suggest that economy-grade 85 octane gas in mountain areas, as well as aftermarket fuel additives like stabilizer (Sta-bil) & octane boosters are generally not specifically called out in an owner's manual. Use of these non-mentioned fuels & additives typically do not void a vehicle warranty.

I'm certainly understand the point and many people are probably going to be following all (most?) of the rules if driving a bone-stock Ram with less than 60k miles. Although I have heard there could be considerable mechanic-level discretion when warranty claims are performed (not an expert on this)...

For me, that ship sailed when the 35's were bolted on. Maybe I was lucky...but I would do it again. Wish e15 was available locally.
 

benjaj

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I have the V6 that's rated for E85. If I run a tank for the computer to get used to it, it's the same as regular when running unloaded. I notice no difference in power or mileage. If I'm pulling a trailer it's very noticeable.
That's impressive. My experience in other FFV's has been 8-15% fuel economy drag.
No doubt I am an ethanol supporter but when I had an FFV, if e85 was 15% cheaper at the pump, I would buy e85. Cost per mile driven is the economic rationale for this fuel (at the consumer level).

There are also GHG emission reduction/ air quality benefits, lower cost fuel constituent and domestically produce product benefits that drove the implementation of fuel ethanol but the consumer generally doesn't take this into consideration.
 

04fxdwgi

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Agree with your statement of caution about "fact" coming from the Cali folks!
There is more to the situation than simply BTU's per unit mass - I do not believe it is "that simple". I acknowledge that energy density is a piece of the fuel economy story but octane for higher compression engines and post-combustion, cooling in the cylinder and exhaust manifold are known phenomenons that will lead to improved ICE performance in future engine design.
Further, even if energy density with the only obvious factor, wouldn't cost per mile driven still be most important attribute?
Understand where you are coming from, as you are a fan of the ethenol. But I am standing on the opposite corner of the intersection and quite a skeptic after seeing the shenanigans (and gross lies) of the past 50 years play out, 1st hand as a driver since the mid '60's. "Lowest cost to the driver" IS NOT the most important attribute of this fuel mix. Politics and greasing the wheels IS. That is all I can say, here on a public forum, about that that.

Interesting points, BUT we are talking exact same engine on different fuels in this context, not engines with different mechanical components in the future. We will see when that time comes, now is now. The compensation is usually done thru the computer to "tune" the engine for the ethenol, over a period of time, such as a tank full and adding some widgets to make it all dance to the tune together. Add one with a shoe missing and it is awful to watch.

Putting in additives to compensate for what is lost by substituting gasoline with ethenol has it's own dark secrets, depending on the additive and just adding another pollutant to replace the gasoline's.

Cost per mile driven is mystical formula that the ethenol folks like to prance around. The difference is the controlled testing that is done vs: real world. Everyone drives differently in varying environments, temperatures and weather, plus loads in vehicles vary, along with wind loads. Oh yeah, don't forget those pesky hills.

Every engine I have had (and the number is quite eye opening for me) since the '75 has gotten better mileage on straight no lead than with ethenol added. Lost mileage = more fuel consumed to go the same distance = higher hidden cost of ethenol. That being said, $2.00 non ethenol is actually cheaper than $2.00 15% ethenol.

My truck (like the last 4 or 5 ) is used for hauling stuff, towing boat, towing equipment, and daily driver, so basically nothing is a constant.

Being a boater, I would NEVER run any ethenol fuel in any marine enviroment.
 
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Rambo71

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I now run the E88 almost exclusively in my '21 Jeep (8k), '09 Dodge (145k) and '15 Ram (125k). No discernible fuel mileage differences from running 87 for years. No fuel related issues. I just like 'less wallet pain' at the pump.
 

NETim

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Looks like gasoline threads are taking over where oil threads left off! :cool: :eek:

2016 5.7 Laramie. For the first 4 years of its life this truck made runs from UT to SD, 1k miles to my Mom’s front door from home then back. i am not a fan of alcohol fuels in vehicles for myriad reasons so avoid it when possible, so on my SD trips I always managed fillups (32gal) so I would only have to fill once in SD, where non-alcohol fuels can be hard to find. Mileage results were very consistent, running at 5mph over posted everywhere except the interstates. Pure gasoline always yielded better mileage—18.5-19.5 on gasoline, 16.5-17 on gasahol, hand calculated always. But as they say, YMMV.

Whomever posted that attitudes on gasahol don’t change is right, and the arguments don’t change much either. Alcohol fans decry oil subsidies, pure gas fans decry alcohol subsidies, and both sides ignore the environmental impacts of their fav fuel and the health risks and costs of polluted air (if you were breathing the air in Denver or LA back in the 70s you know what I mean). In the end, they will both succumb to a temporary transition to electrics and hybrids on their way to long-term transition to hydrogen-fueled vehicles. And finding gasoline for your vintage vehicles will be like trying to buy kerosene for a wick lamp…
;)
best,
DGgo
I have no problem with market driven solutions. .Gov shouldn't be in the business of picking winners and losers. I am not a fan of government subsidies in any event.
 

WaltKowalski74

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Excellent dialog on the effects from alcohol to non-alcohol fuel choices and mileage results. But until a cleanup occurs in aisle 5 from the numerous 2008 Pontiac Grand Prix's or 2001 Chevy Monte Carlos spewing vagisil fumes and ***** weed, blowing through the streets and highways most with dangling rearview mirrors or flirting gun shot wounds, the air will never be as clean as it is today. I will enjoy my HEMI while I'm alive burning 89 and prepare for the Mad Maxx rat circus soon in this country.
 

melvingeraldmesse

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I have used the E15 88 octane gas in my 2021 power wagon. I had no decrease in milage. I would use it all the time but it's not that common here in southeast Kansas.
 

RAM_Davis

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Denatured ethanol has 30% less energy than straight gasoline. Because of this, moving from 10% ethanol to 15% ethanol is about a 2% difference in MPG (basically .3 x .05 = 1.5%). I haven't noticed any difference so if it's cheaper, I'm buying it. We have Sheetz all around so it's nice to have the option, though I will say that 87 at Sam's Club is often a similar price.
 
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