92 octane gas

I filled the tank 51.00 dollars worth the other day and drove it today up in the hills. What a difference in throttle response. No more sluggish feeling in drive. I tried the ECT mode and that felt very responsive also. Think i well stay with 92.

 

Placebo

 

Higher octane is higher octane. The amount of noticeable difference may be debatable but there should be a difference, because the compression ratio for combustion of the fuel itself changes.

 

Well i think with 11.1 compression they may need it veritable cam timing or not. I know the sluggish starts in drive.

 

I would agree with JKO1998. Unless your vehicle requires a higher octane, it shouldnt affect how it runs.

 

Placebo + Your truck has learned your driving habits.

 

Try ethanol free

 

The bigger question is when an engine tune or shifting controller requires you to “upgrade” to 92 octane, how much benefit is delivered by the mod, and how much by the fuel change?

 

I would say the mod must change the timing. Higher octane fuel to reduce detonation

 

That...

 

Not really. Energy for the fuel at different octanes is the same. Different octane at altitude could make a difference. Oh, and WOT.

 

The engine was designed for 87. You're just wasting your money. But, it IS your money. Have at it.

G.

 

OMG... this debate never ends. The placebo effect in full force... high compression engines need higher octane to reduce preignition of the fuel due to said high compression. It does nothing for power, responsiveness, sluggishness, blah... blah... blah. Any “feeling” of change is in ones head. But hey, it’s your money... if it makes you “feel good”, spend it!

That said, if your engine is knocking with regular fuel, and high octane gas cures that knock... then it’s possible your engine has so much carbon build up in one or more cylinders that the volume has been reduce, thus causing a unintended higher compression within those cylinder(s).

 

Yeah, the stock 3.5 is tuned for 87.

Higher octane shouldn't hurt, but it won't improve anything unless your engine runs on the hot side with 87 (higher octane will often run a bit cooler, I don't know why and never researched it).

Not all 87 octane gasoline is 87 octane. My motorcycle is very sensitive to this. I know which gas stations sell the good stuff and which sell crap. 87 gas from a good source runs great in my 3.5, and it would be silly to spend 1 cent trying to improve it.

Price has nothing to do with quality. The best gasoline I can get is, ironically, the cheapest.

Beware placebo effect: every person is wired to believe that you get what you pay for e.g., Apple, Bang & Olufsen, and Bose are still around.

If you forked over the cash for OVT, which changes the stock tune, then use an octane rating consistent with OVT's recommendations. I believe that's usually 91.

 

I get less pre-ignition pinging and better MPG with 91 vs. 87. I haven't noticed any different in responsiveness or drivability.

 

I think it does make a difference...

87 AKI=91 RON=83 MON
91 AKI=95 RON=87 MON

I believe the difference in MON is, 'where it's at'.

 

http://www.toyotareference.com/guts/tacoma16_engine.pdf

Check out the fuel specs.

 

OVTune has an octane learning tune that allows the engine to adapt from 87, 91, and 93 octane.

Having said that. The change in octane is VERY noticeable. 93 octane nets 60 more HP and considerable torque.

I’m a huge fan of the 91 octane tune and the 4.88 gear adjustments. Freakin rocket ship

https://www.ovtuned.com/products/toyota-tacoma-2grfks-calibration

 

I wish more folks would actually run premium in your truck, test it out with some full throttle pulls and aggressive passing on the highway vs. 87 and say this is placebo. It is not. Many have experienced the same, and many are NOT idiots who can't tell the difference in placebo and actual performance increases. Even Toyota field techs have agreed that these trucks (and many of their vehicles) will leverage the ignition advance and produce a more enjoyable driving experience. My truck vibrates less (not placebo), sounds smoother, and absolutely has better get-up-and-go. I totally understand the balance of value vs. performance and for most it isn't worth spending the extra few dollars a tank, but for those who do, it is likely not just in their head. Modern ECUs compensate for and actually get a benefit from increased octane, and it is nearly instant vs. the old school thinking that it takes several tanks to realize a difference. The Taco advances ignition until there's knock and does so very quickly so when you fill up with 92 or 93 you'll likely see a knock feedback value increase from around 18 (on 87) to the high 20s at near sea level.

Here's a great explanation I've seen on the forum: https://www.tacomaworld.com/threads/better-mpg-on-87-vs-89-gas.546382/page-2#post-17713449

The truck will run fine on 87, but this engine was originally designed with premium in mind and our trucks can realize improved performance through ECU compensation (and obviously even more performance improvements with OVTune which is designed to extract the most power possible from 91-93 octane

 

I knew it wasn't fixed, and I wish it made sense for me.

The 210-225 the stock tune actually puts out is adequate. And nothing will improve my bike's performance.