what about how drunk your vehicle gets off gas with ethanol in it. in Ontario the 91 octane gas is ethanol free and the 89 contains 5% and the 87 contains 10%. now if you find 93 i think it usually contains the same 10% as 87

 

Gotta love it...

Ethanol actually has a pretty high equivalent to octane just being what it is.. comparable to something like 105 or so, iirc..

Our engines are tuned for a window.. you could tighten them up if you could safely control the environment it operated in.. because we can't, there is a few wiggles left and right of optimum.. those wiggles cost economy and performance.. its a neccissary evil.. y

 

It's no tall tale, I wish I could duplicate it, but so far my best average was 25.64 mpg over a single long trip on a fresh tank, it was about 3 months ago but it happened. For the most part 19-20 is what I was getting for a real average over a few tanks, but 25.64 happened in my 318. now after putting a few miles on it throughout the summer, it needs some TLC. I'm addressing it now since my avg lately has dropped to 17, no biggie though.

 

I run Sct and get 12 mpg on 91 and about 8 on 93

 

Ethanol has less energy per unit volume than gasoline. Therefore, any ethanol blend gasoline with ANY octane rating will yield poorer fuel economy than the same octane gasoline without ethanol.

 

agree whole heartily.. I hate that junk, and it is junk.. I just had to rebuild a leaf blower and a weed eater engine- and the effects of ethanol is the primary culprit.. you know, it started with cracked primer bulbs, then the discovery of hardened lines, then the build up on the carbs.. grrrrrrr. I hate that junk..

I was just pointing out the more controllable ignition point of alcohol.. just because it's more controllable doesn't make it better.. not by a long shot..

 

Yup, I've redone the fuel systems on my trimmer, my grandma's trimmer, and her chainsaw.

Thank God I haven't had to do my mower....i don't relish it.
I put SeaFoam in my twostroke gas every once in a while to clean some of the varnishes out. Same thing with my lawn mower. My mower is 6-7 years old and it runs like new.

 

i good friend of mine is in the process of having his '99 150HP Yami outboard rebuilt.. why? guess.. long term, ethanol is evil..

you know good and damn well it's wreaking havoc on your engine too...

startron is good stuff.. real good stuff..

I have a rec gas joint that has pumps accessible for vehicles about 20miles out of my way.. I often daydream about regularly driving over there just to fill up on the stuff.. when I've been near, and near empty, and actually used clean 93 octane ethanol free gas, the results are astronomical.. we're talking smooooth operation, drastically improved throttle response, and easily a 2~3MPG bump..

before anyone goes to figure that is because of octane, I'll debunk it.. it is because the very consistent nature of running pure gas and the ability to tighten the parameters in the tune.. I don't have to tune it, the PCM can handle it tightening those parameters all by itself.. we're talking watching STFT hold figures for minutes, instead of fluctuating as much as twice a second, while watching the spark advance to 40+* and holding consistent, all while observing -16+" of vacuum where it usually bounces between -10~14" doing the same job holding highway speed..

to address the SCT comment by lastrights, somewhat: I run the 91 tune with 93 gas.. it delivers better fuel mileage, and NEVER pings.. it's more economical to run the higher test while pushing the envelope on spark advance... it doesn't suffer from what the 93 tune gives, which is advancing spark AND adding more fuel.. meaning I don't load the engine to achieve and hold the RPM I need..

using startron seems to give me what I would guess is at least 40% of the same benefits as running straight recreational fuel.. which is to say a 40% better than a 10% ethanol blend..

by the end of next year, we'll all likely be finding 15% ethanol blends at every station.. Thank you Mr. Man.. you're a jerk..

 

Given the drought this year, and the gas companies asking for waivers on ethanol content in fuel, I am not sure if we are going to see an increase in the amount we find in our fuel.....

What I find most amusing though is, the gubbermint legislating higher required fuel economy for cars and trucks with one hand, and then forcing changes on the fuel producers that pretty much assure the auto companies are going to find that their fuel economy numbers just dropped because of them.

"We want you to build cars that get better gas mileage, and do it with even worse fuel than what you have now."

 

our fearless leader just acknowledged a week or so ago that "yes indeed food costs will increase as much as 1/3 next year (economic experts disagree, they are figuring from 33% to 55%) but we will meet the 15% mandate on schedule."...

the grains used to meet production will cut into feed for livestock, and those will be the biggest impacts.. ranchers are already slaughtering as much as two years early because they simply can't afford to feed them, and coupled with the drought, are having a hard time feeding them anyway..

what a tangled web...