keithguts

OK, I have a 95 runner and would like to know what octaine you all are running. I have a 3.0 in my runner. Give me some feedback please. I guess what I'm trying to find out is what type is the best for a 3.0.

Keith

mastacox

Regular 87 octane in my '92, runs fine.

Super Premium 91 in the '98, it hurts a little

dcg9381

The *best* gas for your truck is the lowest octane fuel that doesn't result in detonation/pinging.

There are some fuel system advantages to "name brand" gasolines that have additives - like techroline.

91RN81

mine runs best on 89 octane from the BP Stations. Exxon is good too.

Guardian_Saint

91 (premium)... ARCO-BP I use the most, 87 will ping on my truck so I ran some 91 octane and it help a bit on the pinging , but just don't put SHELL gasoline in it cause you will notice a missfire.

Elton

Regular 87 octane in every thing ive owned

4x4Lamm

Gas has been so cheap here lately I have tried a few tanks of premium and have noticed no difference.

Lamm

95RunnerSR5

regular octane for me...there is no point in using higher octane gasoline in our engines unless they are specifically tuned for them. higher octane gas is harder to burn and doesn't make a noticeable difference if any.

ovrrdrive

Highest octane I can find in town which is currently BP 93 Premium. Even with the 93 I still ping hell when the temps out are over about 90. As its cooling off though I think the problem is lessening though.

I think I have issues.

My truck has always pinged on anything less than premium though, but in times passed the premium would make it stop.

4mydogs

Mine, too. That's why I run nothing but premium grade in it.

maxpower_hd

I run the cheapest gas I can find in My 22RE and it runs fine. The same goes for my wife's Celica GT. My motorcycle on the othe hand doesn't seem to like the low octane as much so I run super in that.

rollem

I know a chemist that works for chevron. I asked about the differences in octane. He tried to put it in laymens terms to me. This is what I got from the conversation. Gasoline is extracted from crude oil by destructive distillation, more commonly called "cracking".

Cracking is based on the fact that different materials boil (read "evaporate") at specific temperatures at specific pressures.
At the lowest levels, gasses (such as "natural gas") are drawn off, condensed and stored. then come various alcohols, gasoline, and other volatiles. Then come light oils and other materials and the system progresses on through heavy oils and so on. So the higher octane gas is above the lower octane. Which makes it more stable. Higher compression cars need more stability for a proper burn, less predetonation (pinging). Lower compression cars can run lower octane cause theres less of a chance of predetonation due to the lower compression.

So my interpretation is as this. You can run higher octane in your lower compression car (our yota'ss) and be fine. Note: I don't think your performance would increase or your MPG's. But running lower octane in your higher compression cars (like a porsche or equivalant) will cause pinging and a lack of performance and loss of MPG's and I'm guessing internal stress aswell.

Well thats my .02 cents....

94toyota4x4

Well, In our trucks unless there supercharged theres no reason for running a high octane fuell, unless you have a full blown out racer 22re, the compression in the 22re is low enough so we can run the cheap stuff, most cars are like this, you can but high octane but youre just being stupid paying more for gas, but in a 22rte, your going to want to run a bigh octane fuel always, do to the turbo creating more compression, I think you canget away with 89 on the turbo motor because it runs at about 4 pounds of boost but if you crank up the boost I recommend a high octane fuel. O yea about the heat, I live in the desert and it can get about 120 here and I never noticed any pingging from heat, Im not to knowledgeable about that, but I have an inch thicker radiator from stock so it stays real cool.

rdlsz24

I agree there's no reason to run higher than 87 unless your owner's manual calls for it (or if you have added forced induction).

Rob

Potomacduck

More important than octane are the additives. I only run Top Tier fuels (like Shell) in my '99 Limited.

Top Tier fuels have far more detergents. **Do an internet search on Top Tier or Tier 1 fuels and make you own decision.

rollem

All that detergents do is clean deposits. Yes chevron uses techron and shell use whatever they use. Thats why you pay a bit more at the pump. And I agree they do work. So 87 octane at chevron or equivalant is probaly your best bet. But if you only have 10 bucks in your pockel and need to get home Go to rotten robie gas station and get your A** home.. remember our Yotas are n the buisness of getting us to where we need to go....

04 Rocko Taco

no reason on earth to run anything more than 87 cheap octane, unless your truck specifically says use premium, or if it is force inducted...

ovrrdrive

I don't care what John J. Chevron says, in an engine that's pinging like hell on cheap (lower octane) fuel there is a definite need to run higher octane. Octane is, simply put, a measure of a fuel's resistance to predetonation.

If you're getting spark knock or pinging, raising the octane is usually an easy fix.

Since it was brand new my truck has pinged on anything less than 91. Rather than make Toyota rewrite the owners manual, I have just always run premium.

Right now I have other issues that are making it ping even worse, and I am still running premium to offset some of that.

I'm not going to put my timing at 0 degrees to stop the knock and have ants run along beside my truck on the freeway...

It's kind of ridiculous for someone who's truck runs fine on 87 to say that it's a waste of money to run premium in a truck that doesn't run fine on low octane fuel. Is it that hard to believe that different situations require different solutions?

97Limited

I run 90-92 octane with Ethanol, Burns cleaner!!

rollem

OVRRDRIVE did you do that MAF mod?