Gas Choice?

[starcommtrey1]

you can make more power even if you advance the timing further with higher octane, however the gas mileage increase is unlikely to balance out the increased cost per gallon of the higher number fuel added with the risk of getting bad gas because less ppl pump from the high octane tank at the station meaning the gas is likely to be much older than what is in the cheap tanks.

Also, and just my opinion, I didnt get my Jeep for the gas mileage. Thats what my truck is for(still only 20 mpgs, but hey its a f350) I bought my jeep for the "Yeah, I got a 80 CJ7 4x4 with a gas guzzling V8! That my ying to your yang of a Prius!!!!"

 

[DHugg]

Alcohol free? How do you get that? All pumps in VA have ethanol


RVA CJ, look up PURE-GAS.ORG. There are 7900 and change places that sell gas with no ethanol.

One of the files on the above site is a ".KML" file that will plot all the locations on a Google Earth map. I've used it while travelling and found what I needed.

Here on the Gulf of Mexico, boaters won't use anything else.

 

[Lumpy Grits]

Have only run prem in mine--
Still going strong at 119K+ miles.
LG

 

[Hedgehog]

I'm a believer in 89. I haven't got enough miles on my Jeep yet to actually know, but in my other vehicles the added cost is more than made up in extra miles. By-the-way, when talking about gas being to expensive for the middle grade of gas we are only talking about a $1.50 per tank full. I'd pay that just to feel better about whay I'm putting in my tank. Also the extra cost isn't only the octane, higher grades of gas have better additive packages in them than the cheaper grades.

When it comes to additives, I'm a Marvel Mystery oil guy. I figure an occasional squirt of Mysery oil from time to time can't hurt. Besides it's one of the oils listed when they are talking about fuel additives.

 

[Scooter402]

I'll be the odd man out here...

VP 110

 

[Petescj]

I run the 89. No more octane ping when under load on a steep grade. The local gas place has this card and if you spend so much... blah blah blah it takes 10 cents off. Thats the difference in the grade anyway.

I'm a believer in 89. I haven't got enough miles on my Jeep yet to actually know, but in my other vehicles the added cost is more than made up in extra miles. By-the-way, when talking about gas being to expensive for the middle grade of gas we are only talking about a $1.50. I'd pay that just to feel better about whay I'm putting in my tank. Also the extra cost isn't only the octane, higher grades of gas have better additive packages in them than the cheaper grades.

When it comes to additives, I'm a Marvel Mystery oil guy. I figure an occasional squirt of Mysery oil from time to time can't hurt. Besides it's one of the oils listed when they are talking about fuel additives.

 

[GatorBate]

I've been running midgrade (89) in my vehicles for years. There was a time that I would put on 4 or 5 hundred miles a week and I experimented with different grades of fuel. I saw an increase in mpg going from 87 to 89 but not much of an increase in stepping up to the 93 gas. What RVA CJ said about faster burning fuels and high RPMs has got me thinking again. when I'm wheeling I am running 1500 to 2500 RPMs. So I thinking that a slower burning fuel would give you more push on the power cycle at lower RPMs. Like a slower burning powder that builds pressure all the way to the end of the barrel rather than a quick burning powder that gives a short hard push and then the bullet coast to the end of the barrel. It seems to me that we always look at what is best at max RPMs and try to make that apply to lower RPMs where we run most of the time.

And as hedgehog said, We are only talking $1.50 per fill up. not much of a cost difference at 3.50 a gallon. Remember 6 years ago when it was $1.80 a gallon?

 

[BusaDave9]

Alcohol belongs in bottles, not gas tanks. My AMC 304 likes 89 alcohol-free.

"one for you. Two for me"

 

[starcommtrey1]

My AMC 304 LOVES 104-114

 

[steve1973]

I'd try to buy tier 1 fuel to make sure it has the appropriate detergents and additives in it. A Sunoco rep once told me that 87 octane gas usually if tested is higher than 87. Reason being, the weights and measures inspectors routinely check for octane and if test below the 87 there are heavy fines involved. That being said I run 91 in my 1973 because it runs the smoothest. No EGR valve that year so detonation is a nuisance that needs to be tamed.


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[CJim7]

Propane.
High on the octane scale, low on the carbon scale, $1.30 cheaper per gallon than gasoline.

Oh...and my engine runs 20° cooler