Billrunner

87 all my vehicles get-why cost and it doesn't run any differently


Dunkin Donuts coffee in me cuz I need the boost.

pasteurized

Here in Iowa the mid-grade stuff (be it 89, 89.5 or 90, depending on where you go) is the cheapest. It is because of the use of ethanol in the gas, it is cheaper because it gives incentive for farmers and what not to buy their own product and it is cheaper to produce than gas without it. Regardless, i always use mid-grade because it's cheapest :-)

Gbost

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"I generally run 92/93 depending upon what I can get at the station I am at, but I prefer to run 101 or 104 when I am close to home and can get down to the race station"

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Rob what is name of that station and were is it? I am somewhat familiar with the area.

WATRD

It's the 76 on Auburn Way, just South of Doxon Toyota. Just look for the big black and white "Trick racing fuel" sign.

The 101 is at the pump closest to the door of the station.

Gbost

Thanks for the info

toy283

4Runner: 85, not on your poll...
Truck: 87 or 91 depending on how much cash I have at the time

jshuatree

Another Coloradan drinkin . . . err using 85

My99

I agree, unless you're blown, no need for anything over 87 if your truck is in good running order. Been running it since 87 in 1 4Runner and since I just got the 99. I never hear them complain, and I figure the 87 would by now since it's got 250K miles on the original 22RE.

With the old Talon, if I were challenged by a local without any fore-warning, I would grab me a gallon of Xylene (tamed down toulene) and dump it in with a gallon or two of 93 to keep the engine from killing itself at 23psi. But on these n/a understressed motors these toyot'as have, I wouldn't bother spending an extra 20 cents per gallon for nothing.

amorphous

Base line for me....seems to work fine. WHEN I've gone to a higher octane....it didn't make a dif...

a

keisur

I guess I'm "blown" whatever that means.

Albuquerque Jim

I think he meant Supercharged "Blown"

keisur

hehe. I knew that.

Albuquerque Jim

Well, I guess there are other ways to be "Blown"

My99

Yup, turbochargers

StingRay

If the book says 87 and you are using it with no ping(detonation) then no performance benefit is going to come from using a higher octane fuel. The Octane rating is the fuels ability to resist pre-detonation of the mixture charge. It in no way reflects the energy available per pound of fuel(BTU's per pound). If the ecu is not programmed to take advantage of a higher octane rating by throwing more timing at the engine up to the knock sensor detecting ping (if so equipped), the timing is not manually altered to take advantage of it, the engine is not Turbo or Supercharged or the compression ratio not increased then in all likleyhood the only thing burning better is money.

4runner4ever

If the higher octane does not effect the BTU per pound, why is it that I get more miles out of 95 or 98 than out of 91 octane?
I allways set my trip meter to zero when filling up and I noticed a better fuel economy with the higher octane. That's the main reason why I don't use 91 anymore.

StingRay

Many things affect fuel economy and for example the state of tune of an engine could require a higher octane than normally required for the engine management system to optimize timing to a normal state without ping. Some modern Hi output engines require high octane fuel to obtain full hp output as that is the only way full and optimal timing can be achieved for the particular engine configuration. It is my understanding that the engine in my 98 Runner does NOT fall into such a High output classification and at 3.4 litres and only roughly 180 HP I believe it. I have MK II Supras that are over 150 HP at only 2.8 litres. It is also not to say that any particular fuel could not have more BTU's per pound than another regardless of Octane rating.

Look at it this way. It is understood by most that when lead was removed from fuel it bacame more difficult and expensive to use other additives to increase the Octane ratings of fuel. How many BTU's per pound do figure lead is going to give if you try to light it on fire? Unless you have a reactor and manage to split some atoms then none. Lead was used both to lubricate and improve the Octane rating not to increase the energy content. If you look at a little bottle of 104 Octane booster how many BTU's of energy is stored in there? Better not be enough to actually make a difference in your fuel economy or it's going to have to be stored in bunkers instead of the gas station shelf. Octane rating is strictly a measure of resistance to pre-igniting under heat and pressure (like diesel fuel does). Why you get better fuel conomy is a very good question but octane rating is NOT a rating of energy content. A higher Octane rating will allow you to more efficiently get the Btu's per pound out of the fuel if and only if your engine is in a state of tune that requires it or is configured to take advantage of it.

4runner4ever

Maybe my supra engine has anything to with this. 3.0L en 204 hp.

StingRay

Sounds like you have a N/A MK III car. The 7MGE's knock sensor, twin cams with 4 valves per cylinder and compression ratio can easily squeeze 200 ponies out of 3 litres. The 7MGTE turbo's can be tweaked way into the 700's no problem.

Check out www.monsterhorsepower.com

Reg is a very old friend of mine ( since we were 6) and builds some of the badest Supra's, other Toyota's/Lexus and BMW's around. He personally has a 94 Supra(4th in the One Lap of America a few years back) that is about 1k HP now and has an 82 with a 7MGTE that is up somewhere around 500 HP now. Runners and Cruisers also run in his family and his older brother is a very serious Cruiser guy around here.

Reg's company is in Calgary, AB. Canada and is called RCTS.

4runner4ever

I've added him to my favorites! I'm uppon throwing some cash into the car again. I found a US supra with a 7M-GTE just a few km from my house.
I was allready planning on reaching 300 hp so maybe this is the time.