Higher octane

[CometKat]

Anyone run a higher octane than the recommended 87? Does it make a difference?

[mws4ua]

higher octane = waste of money

[beastlytaco]

yeah higher octane gasoline is only recommended for high compression engines. like ferrari, bmw, and so on. some people on here run it on tacomas. if your engine is giving you you some knocking, try running seafoam through it. itll make your truck smoke like hell if the injectors are dirty.

[Ridgerunner]

Not really. There is a marginal yet factual difference in performance between 87 and 91. You have 'knock sensors' in your engine. When you run 87, your ecu will retard your timing to eliminate knock ("pinging" or "detonation" are other terms for it) thereby losing a small amount of power. when you use 91 (I wont use anything else) you are running full advance timing and are utilizing all the power your engine has. The price differential to me is small. IMO, and this is MY opinion only, if you run 87 and the timing is being retarded by the ecu resulting in slight loss of power, then you will tend to use more throttle to get to speed, hence mileage will go down slightly-hence more fuel burned. IMO, it is better to run 91 at the slightly higher cost because the benefit is the maximum timing

[beastlytaco]

wow. good info. i didnt know that. +1

[Ridgerunner]

Originally Posted by beastlytaco

wow. good info. i didnt know that. +1

Whatsup buddy that is what I have learned both here and researching on the net. When Chris4x4 comes on later I will run this post by him and verify my accuracy because he IS the man on this stuff-but I'm confident in my post Besides, I noted an uncomfortable difference in "pickup" in my truck between the two octanes-which is what prompted me to research in the first place!

[beastlytaco]

yeah thats mainly how i learn stuff. performance stuff that is. i just read posts and listen to you guys and i do some researching on my own.

[BrunesDoesTRD]

Originally Posted by beastlytaco

yeah higher octane gasoline is only recommended for high compression engines. like ferrari, bmw, and so on. some people on here run it on tacomas. if your engine is giving you you some knocking, try running seafoam through it. itll make your truck smoke like hell if the injectors are dirty.

When you run seafoam thru your engine do you use all three of the methods....or just a selection of Gas/Oil/Intake.

I used it on my scion- Got it in the Oil and Gas....Not sure how to introduce it to the intake tho....Suggestions?

[dually]

+1 on the seafoam, good stuff

[klown]

anybody have 0-60 and 1/4 mile times with 87 vs 91 octane?

Or maybe dyno numbers?

[eordonez]

Originally Posted by Ridgerunner

Not really. There is a marginal yet factual difference in performance between 87 and 91. You have 'knock sensors' in your engine. When you run 87, your ecu will retard your timing to eliminate knock ("pinging" or "detonation" are other terms for it) thereby losing a small amount of power. when you use 91 (I wont use anything else) you are running full advance timing and are utilizing all the power your engine has. The price differential to me is small. IMO, and this is MY opinion only, if you run 87 and the timing is being retarded by the ecu resulting in slight loss of power, then you will tend to use more throttle to get to speed, hence mileage will go down slightly-hence more fuel burned. IMO, it is better to run 91 at the slightly higher cost because the benefit is the maximum timing

That's a very good point there, im wondering if anybody has tried this with their scangauge, check consumption with a tank of 91 and another with 87.....

[CometKat]

Originally Posted by Ridgerunner

Not really. There is a marginal yet factual difference in performance between 87 and 91. You have 'knock sensors' in your engine...

I am going to try the 91 on the next fill up. I don’t detect any pinging (which I shouldn’t with the modern system) but I drive up mountain passes regularly and could use all the power I can get out of my 2.7.

[Janster]

I run 87..... and if I ever haul or tow anything long distance, I'd use midgrade. The cost of the hi-grade just isn't worth whatever benefits it'll give you unless you're hauling/towing/ or racing.

If I'm gonna gain any *power* in anything worth putting 93 in....is in our corvette. It actually requires it.

[gm3bow]

fo' real???? i'ma try several fill-ups with 91 to see how my mpg's are affected. i hit lots of hills on my commute which require me to step on the pedal a bit harder. if 91 can keep my tranny from shifting up on the hwy hills i hit and keep my speed constant than i'll prob keep using it.

Originally Posted by Ridgerunner

Not really. There is a marginal yet factual difference in performance between 87 and 91. You have 'knock sensors' in your engine. When you run 87, your ecu will retard your timing to eliminate knock ("pinging" or "detonation" are other terms for it) thereby losing a small amount of power. when you use 91 (I wont use anything else) you are running full advance timing and are utilizing all the power your engine has. The price differential to me is small. IMO, and this is MY opinion only, if you run 87 and the timing is being retarded by the ecu resulting in slight loss of power, then you will tend to use more throttle to get to speed, hence mileage will go down slightly-hence more fuel burned. IMO, it is better to run 91 at the slightly higher cost because the benefit is the maximum timing

[beastlytaco]

Originally Posted by BrunesDoesTRD

When you run seafoam thru your engine do you use all three of the methods....or just a selection of Gas/Oil/Intake.

I used it on my scion- Got it in the Oil and Gas....Not sure how to introduce it to the intake tho....Suggestions?

no i have mainly just poured it into the gas tank. for oil i use lucas oil treatment. it lubricates rings and it bonds more easily. it has a very thick consistency. we run it in all of aour cars. a matrix and the tacoma. i just use regular 87 octane. as for the intake im not sure either.

[chris4x4]

Originally Posted by beastlytaco

yeah higher octane gasoline is only recommended for high compression engines.

The Tacomas 4.0 has a compression ratio of 10 to 1. Thats pretty high for a truck.

Originally Posted by Ridgerunner

Not really. There is a marginal yet factual difference in performance between 87 and 91. You have 'knock sensors' in your engine. When you run 87, your ecu will retard your timing to eliminate knock ("pinging" or "detonation" are other terms for it) thereby losing a small amount of power. when you use 91 (I wont use anything else) you are running full advance timing and are utilizing all the power your engine has. The price differential to me is small. IMO, and this is MY opinion only, if you run 87 and the timing is being retarded by the ecu resulting in slight loss of power, then you will tend to use more throttle to get to speed, hence mileage will go down slightly-hence more fuel burned. IMO, it is better to run 91 at the slightly higher cost because the benefit is the maximum timing

This is correct. Sometimes the cost of the more expensive fuel is a factor for the end user. FWIW, the newer 4.0 1GR-FE is rated at 236 h.p. 266 lb/ft. on 87 octain and 239 h.p. 278 lb/ft. on 91. a gain of 12 lb. ft. of tq for a few cents more per gallon. I have done some comparos with different Oct. of fuel. With my Tacoma, when towing my boat, useing 87 I get around 14.5 mpg.. 89 and towing the same trip I get 16.1 mpg. I havent tested 91 yet. I find the extra performance worth it. Not all vehicles respond this way. My Dodge got WORSE mpg when run on 91 oct. vs. 87, but higher Octain does seem to benafit the Tacomas.

[Ridgerunner]

Thanks Chris well guys there you go-straight from the guy who actually puts claims and theories to the test! Now that gas prices have dropped a bit, it's a good time to do your own test

[blackonwhite]

i have an 06 4 banger regular cab manual and i can tell a big difference between the 87 and 93 octane....where i live its 93 not 91...that could be why.. but with 87 there is no acceleration wat so ever.. but if i put 93 in it its pulls like crazy... could be my imgaination but i am pretty sure its makes a difference in my truck and for 10 cents more why not