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Witch is best fuel to run

lcxu105

By lcxu105,
in Engines & Forced Induction

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GTSBoy Grand Master

GTSBoy

Posted
Posted

E85 is not out of the question.  I would suggest that you can take the tinfoil hat off.  There are many people on these forums and others reporting that E85 sits just fine in a fuel tank without absorbing the Pacific Ocean.

And if you left the tinfoil hat on there are ways and means that you could get around any such problem.  Such as, put it away with a nearly empty tank, and put fresh fuel into it from a jerry can just before you use it.  Or any variation on the theme.

Let's face it....old petrol is worse than new petrol.  If you leave old petrol in a tank for 6 weeks it will change over that time.  If you ever find yourself leaving a car for a long period of time then the best thing is to leave it with as little fuel in it as possible and put new fuel in it immediately - well at least before giving it any curry.

Lithium Grand Master

Lithium

Posted
Posted

I must be missing something here, 

20 minutes ago, lcxu105 said:

It only gets use maybe once a month and can sit upto six weeks at  time and not move.

So e85 is out of the question.

I must be missing something here, there is a general statement then E85 gets ruled out.... how are these two things related?  Pretty much everyone I know who run E85 use them about that much and leave them for that kind of time period regularly as we don't get E85 at the pump, so it's usually a race car thing and the cars tend to sit with it.  The only issue so far with my mates ones have been one which had non-E85 compatible foam in the fuel tank which got dissolved and caused issues in the fuel system... lots of crap through everything, but easily avoided by making sure everything is E85 compatible.

Most race type fuels have down sides and things to be aware of, if you're going to be paranoid then use 98.  

Ad's Mentor

Ad's

Posted
Posted

My car sat with half a tank of E85 whilst I had the motor and box out over four months. Starts and runs fine every time and the same fuel will still be in it when it leaves the garage in October, obviously I'll fill her up with fresh E but Iv never had a problem.

Another point- That fuel has been sitting in my tank since last December.

Plenty of people let it sit and never have issues.

iruvyouskyrine Grand Master

iruvyouskyrine

Posted
Posted

Have used lots of old E85 that people have given away for sitting over 2-3 months. Oldest fuel I have used is easily over 1yr old and car ran fine, AFR was fine. This was giving the car a very hard time at Queensland raceway as well in 40deg heat

GTSBoy Grand Master

GTSBoy

Posted
Posted

Doesn't matter.  Exactly what is going to happen anyway?  I won't type it all out again, but perhaps search for a couple of posts on here where I tiraded over the stupidity of thinking that gallons of water can get into your fuel tank through whatever air movement there is.

mikel Community Regular

mikel

Posted
Posted

yes E85 is hygroscopic, ie will absorb moisture from the air, but at the same time, 98RON fuel has additives which are quite volatile and will "gas off" over time which will reduce the octane rating of 98 if left to sit.

A bit of absorbed water in E85 is less likely to affect it's octane rating, as it's the ethanol content that provides the high octane.

Normal 98 fuel left sitting could be closer to 95 octane by the time it's sucked into the engine - IMO a bigger risk on an engine highly tuned for fresh 98.

IMO the "sitting" time is not a good criteria for deciding E85 vs 98.

It's more about your horsepower requirements, availability of E85, ability to fill up on a long drive, carrying jerry cans of fuel etc

cheers

Mike

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Sick_R31 Experienced

Sick_R31

Posted
Posted
31 minutes ago, lcxu105 said:

Ok than. I've heard that e85 turns into a jelly. Has anyone ever had this happen to them 

 

Whoever told you that please go headbutt them. I have been running e85 for the past 4 years and left 40L in the tank while the car was off the road for 10 months and nothing bad has happened.

Ad's Mentor

Ad's

Posted
Posted
1 hour ago, lcxu105 said:

Ok than. I've heard that e85 turns into a jelly. Has anyone ever had this happen to them 

 

Maybe if your E85 absorbs enough moisture over time and you add a few packets of jelly to the fuel tank it will, but honestly it aint going to do shit.

Piggaz Grand Master

Piggaz

Posted
Posted

Opened up my filters two weeks ago after sitting around from November with E85 in the tank. These fuel filters were cleaned in July/August last year. This is what came out. Was pretty yuck.

Whole fuel system went in the bin!

AD372875-F66A-4E59-B5B3-A148391C7DB2_zps

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