What octane gas do you pump?

[acme]

Originally posted by Diablo
I've run 87 since day one with mine. Never pings or anything and runs great. I'm not so sure that 91 is really 91 anyway. I've seen more than a few news reports and stuff on Discovery Channel and the like that show that all of the gas is pretty similar.
I used to mix half 87 and half 91 when I had a super high HP Corvette. I read in a Vette magazine that you ended up with higher octane by mixing the two. I'll try the 91 on the next tank maybe and see if I notice any difference. This Tundra eats so much gas though, that it's nice to run the cheaper stuff.

Half 87 and half 91 would be 89 octane.....

Just add 87+91= 178 Divided by 2 = 89

5 Gal of 87 and 5 gal of 91 would still be 89 proof..



Alan

[Diablo]

Originally posted by acme
Half 87 and half 91 would be 89 octane.....

Just add 87+91= 178 Divided by 2 = 89

5 Gal of 87 and 5 gal of 91 would still be 89 proof..



Alan

I know, but the magazine article was saying that it resulted in a higher octane rating. It was a race team that raced Corvettes and they were saying that this would result in a higher rating. They gave some reasons but I just did it. Couldn't tell a difference. So math rules and they were probably wrong.

[acme]

Originally posted by Diablo
I know, but the magazine article was saying that it resulted in a higher octane rating. It was a race team that raced Corvettes and they were saying that this would result in a higher rating. They gave some reasons but I just did it. Couldn't tell a difference. So math rules and they were probably wrong.

We mix Xylene with 93 Octane for racing and testing our race cars (Turbo Buicks) and have to use the math to find how much octane......
Xylene is 117 rated, so 1 gal of Xylene mixed with 3 gals of 93 =
99 Octane......... 93 x 3 = 279 plus 117 (Xylene) divided by 4 = 99

This is 30% mix (3 gal of gas , 1 gal of Xylene ) as in the below tech info..


... tech info on it:

http://www.gnttype.org/techarea/misc/octanebooster.html

We use the formula # 2 (Xylene) in the tech site above.

Xylene and Toulene is in 87, 91, 93 gas and racing gas already to clean and give it the octane rating. (look on back of the small bottles of Fuel Injector Cleaner at the parts store and you will see "....contains Xylene (or Toulene)........Pouring in more just gives it more Octane and keeps your engine clean from carbon.....Pour a gallon every 2 months in your tank and it will keep everything clean..... Plus it's safe for sensors since it's already in Gas.....I put it in my 2003 Tundra ..

Alan

[Diablo]

Wow Acme!
That's cool. I make guitars so I use all kinds of solvents in the finish. I use UV polyester and because of the heat in Texas, I sometimes have to play around with solvents. You can get toulene and Xylene in all kinds of quantities for all kinds of uses. From looking at your info, it looks like I could make some nice octane boost and it would be not too expensive to do. Thanks for the insight! If I get a chance to try it, I'll let you know how it works. Thanks again.

[acme]

Originally posted by Diablo
Wow Acme!
That's cool. I make guitars so I use all kinds of solvents in the finish. I use UV polyester and because of the heat in Texas, I sometimes have to play around with solvents. You can get toulene and Xylene in all kinds of quantities for all kinds of uses. From looking at your info, it looks like I could make some nice octane boost and it would be not too expensive to do. Thanks for the insight! If I get a chance to try it, I'll let you know how it works. Thanks again.

Since Xylene and Toulene is a dry solvent, use some Marvel Mystery Oil ( 1/2 ounce per gal of Xylene used) to replace the lubricating oil that's in gas. This keeps your injectors and fuel pump happy.. You can buy it at Pep Boys or your favorite auto parts store. It's in a red bottle with black lettering It's easier to mix it in a 5 gal container first , then put it in your tank, less messy and use a wide funnel, you know what it does to paint


Alan

[Big Green]

To Keipher's and V8Toilet, i'm hoping not to stick my foot too far in my mouth, but I was more reffering to Lexus cars, not SUV's that use bigger (more torque) engines.

[primerhead]

Quality of gas varies from place to place, so why pay
for additives that are not needed.

[03TundraTRD]

I just pumped a full tank of Mobil Super unleaded w/STP octane booster and I do feel a little more power under 3000RPM.
Gonna check if I gain/lose ang gas mileage.
And I plan on adding some toulene with Mobil Super unleaded later in the next couple of weeks just to see what hapens.

[twism89484]

I have an 04 DC...which means a 4.7 V8. Is it a must that i use 91 Premium? Currently, i'm one garde lower...89.

[KLS]

Doesn't your owner's manual and the sticker on the fuel filler flap say 87 octane? Works fine. If you can try different brands of 87 for several tankfuls each during repeatable driving to find any differences between brands in your area.


KEn

[42GAMI]

im a big fan of premium 92, i dont care how broke i am, but since i aint got an S/C, and my owners manual says so, i fill my ride with good ole 87 regular!

till i hear my motor cry/ping/knock for anything better, its good enough for me.

i still put 92 in my 89t supra!

[H2O_MAN]

Regular 87 from BP/Amoco in both trucks.

Never a problem

[THarms]

if your vehicle is not set up for higher octane then it is not only throwing $$ down the tube at the pump, but it actually hurts engine performance by slowing down the burn during ignition. Unless you are supercharged, both the Tundra/Sequoia are set up for running 87 (R+M/2) octane, thus if the ecu is working properly you should see little if any benefit (and possibly even a decrease in performance) if you run higher octane. Some on this forum have moved up to using higher octane due to engine "pinging"... but IMO that is just putting a "bandaid" on some other problem that is occuring within the engine (possibly cylinder carbonation).

That said, I do run a tankful of 92 octane gas thru my Sequioa every couple of month as higher octane fuels typically contain more "aromatics" (toluene, xylenes, etc) which are excellent solvents and clean the fuel lines and injectors.

[tundradcabtrd]

i use 87 only cause im in cali, i cant afford to put anything more expensive in it

[lunagr]

Originally Posted by tundradcabtrd

i use 87 only cause im in cali, i cant afford to put anything more expensive in it

Same here... especially in San Diego. Gas is much cheaper in Orange County / L.A. Fortunately, my 4.7L Tundra is perfectly happy with 87!

Steve