crackerjack

Just a some anecdotal comments...I hauled gas for a summer down in Fl. It was funny the special grades got a "squirt" of something that was in a container the size of about 2 55 gal barrels per semi tank load ?
And the Indian (from India) guys wanted me to dump 83 in the 93 ground tanks and I refused...cost me my job

thook

Cost you your job, but not your peace of mind...if you happen to have any..hehe.

I run only what I can afford, which is regular...usually 87, sometimes 85 when I'm not at my regular station. I have '86 22re and a '92 3vze and live not too high of an altitude in the Ozarks, and the '92 never has any problems. Well, neither does the '86, but...

(BTW, crackerjack....I'm originally from Memphis. I traveled to Cookeville about 15 years ago with a buddy and helped build a Buddist retreat at some fellow's house in the boonies. He had his own saw mill and cut all the lumber for it. Nice little town ya'll have. We stopped at a little chinese restaurant on the way out.)

Sonofmayhem

i use 100,(racing fuel) it really helps with these colorado passes.

slater442w30

My old 3.0 pinged horribly on anything but premium, the mileage never got any better but the ping went away.

I only run premium and octane booster in my truck which now has a 95 T-100 3.4 in it, and it has never pinged even before the octane booster, but the knock sensors are picking up an excessive ping and sending my computer into safe mode which is 5 degrees of timing and minimal fuel, so why would the regular cheap gas make this better as stated earlier, I am confused.

xxJDxx

Its been mentioned a few times now that our ECU's cant detect higher octane and advance the timing, but did any of you ever condsider that when running 87 or 85 you might just be driving around with permanently retarded timing? they can do that...

i run 89 because it stops my 3.0 from pinging. These engines might have been designed to run 87 when they were new, but as deposits build up in the combustion chamber they create uneven temperatures (hot spots) that can cause detonation... I don't think most of us have clean engines anymore..

ohyeahcrx

89 for me. New rebuilt engine figure id better treat it right from the beginning.

Keith B.

[QUOTE=xxJDxx;51256264]Its been mentioned a few times now that our ECU's cant detect higher octane and advance the timing, but did any of you ever condsider that when running 87 or 85 you might just be driving around with permanently retarded timing? they can do that...

Of course the ECU can't tell what kind of gas in in the car, but it does constantly listen[literally...the knock sensor is in effect a microphone] for pinging; when it hears pinging, it retards the timing; If you have a higher octane gas, it'll be able to advance the timing more, before pinging starts. So the ECU can sense, in an indirect fashion, what kind of gas is being used.

4RunningColorado

I live in Colorado 5,500ft I bought my runner last april from a guy how never used under 89' I fill up at Costco they have two choices 87 or 91 I run 91 in my tank I get good gas millage and everything sounds good. I never ever let my tank go below 1/2 this helps to get even better millage and does not ever make my motor work harder than it needs to.

abecedarian

I use 87 octane in both my trucks without problems. The 88 4Runner get's slightly better mileage with higher octane, maybe 2 mpg more, so it's not enough to justify the extra cost per gallon.

Consider a 17 gallon tank with 87 @ 2.85/gallon and 91 @ 3.55/gallon. 2 more mpg means about 34 more miles on a tank of 91 versus 89.
17 gallons @ 2.85 = 48.45 to fill, and @ 3.55 = 65.45 dollars. That means it costs 17 more dollars to go that extra 34 extra miles. For 17 dollars, I could buy almost 6 more gallons of 87 and go 100+ miles, which equates to about 70 miles farther with 87 than the 91 for the same cost.
Summary- 87 octane gets me more miles per dollar than 91.

peow130

I run 92.
Runs like a champ.

rdharper

Exactly. Lowest octane saves you money... but of course you miss the sense of treating your baby right!

Take the money you save and buy your significant other dinner periodically. She will make your engine purr.

Teuf

Siebenundachtzig nur, Man i loved running VP in my ATK, smelled sweet.

Magnusian

I run ethanol-free 87. Sure the emissions are worse, but there's only one gas station that isn't a 30 minute drive from my farm and that's what they sell.

rdharper

I think what you just said was... I used to run nitro-methane in my ATK engine.. but I'm over that, and run only 87 in my Toyota now.

tj884Rdlx

has everyone been forced to use the 10% ethanol now? is that nationwide? we have it in ATL metro all year now. i hate it. i don't notice the effect as much in the truck, which i always use 87, but in the motorcycle (twincarb) it will start to pop on decel depending on which brand (thus what % of ethanol) i use. (also 87) i always try to get chevron. BP makes my bike pop a lot.

Magnusian

Depending on where you are it's required by law in a lot of States (not sure if it's required in any Provinces though), and if not, a lot of places still have it anyways. Here in Ontario it's pretty standard to see around 10% at almost every gas station but there's a few that sell it without ethanol. I actually keep two jerrycans for gasoline, one is for ethanol-free only because some of my gas-powered tools run better on it, like my chainsaw, weed-whacker, lawnmower, etc. 2-stroke engines tend to like it more than gas with ethanol.

Teuf

I meant ATK, as in ATK 406 dirt bike, air cooled rotax motor. Horst Leitners creations