What kind of gas you feeding your 3rd gen taco

Octane rating is the fuels resistant to combustion not caused by the spark or knock resistance. Higher compression ratios, forced induction, things that may cause hot spots in the combustion chamber and ignite. Having combustion not caused by the spark. This can result in pinging, piston slap, knock etc. Higher octane fuel will have a resistance to ignite in these conditions.

Running an higher octane fuel can allow your engine to have a more aggressive timing. This can result in more power, resulting in more efficiency= more mpg. Since the best timing is found right before knock occurs, the higher octane fuel has a higher knock resistance therefore more aggresive timing can be achieved.

But if the engine can not adapt to the fuel it's using. It will do nothing.

Better explanation below

 

So, gray223, my question to you is, can the 1st, 2nd, or 3rd generation Tacoma engine adapt to the fuel it's being fed?

 

Higher octane does not "give a slightly hotter burn". It takes more heat to get it to combust, hence its resistance to knock and detonation, but when it is compressed and ignited and burned its not hotter or cooler than normal gasoline.

 

Ok I need to Edit my post.

Engines are equiped with knock sensors. When the cylinder temp goes up knock somtimes occurs. i.e the gas ignites without a spark. The vehicle then compensates for this by retarding the timing and eliminating the knock. This retarding of timing takes the engine away from it optimal timing, where the best power and effiecency occur.

So if your engine is happen to retard the timing alot from knock, then a high octane level then recommend will produce more mpg/power.

Other wise it will do nothing but take more of your money.

So say I have a truck that's rated for 91 but I always run the lowest grade I can find. The engine will have to retard the timing to eliminate knock coming from the less knock resistant fuel. So I switch to 91 where the truck no longer has to retard the timing from knock and can run in its optimal timing. Therefore you get better mpg then before.

 

Conoco 91 non-ethanol

 

Corey, When it comes down to it, yes you are correct. I stated it incorrectly. By hotter burn, I was referring to the mixture compressing fully (without pre-ignition that causes knock or ping). So you would get the full benefit of the compression cycle. I have noticed a difference in a tank of 87 and a tank of 91. Was it a big difference...NO. Will it make a difference for everyone...probably not since this is not considered a high compression engine. Are we wasting our money.... yes we are being a little extravagant! But thanks for setting us straight.

 

Haha no worries. Some of the 2nd gen guys were/are getting a lot of noise from their engines in the form of pinging and had to switch to the higher octane to stop it.

 

Also reading back....sorry for sounding like an ass.

 

It all comes down to, if your runing higher octane then what the manual suggest, your wasting your money.

 

I wish I could do some tweaking on my Tacoma.

 

that's a neat 3-d mountain, needs a few happy bushes tho

 

That's my main timing table

 

science, guess I was never good with graphs

 

https://www.youtube.com/watch?v=FPPkPAbzwbU

 

Corey, Now worries. We all need a little levity here and there. We are here to learn and grow(and get corrected occasionally). Really appreciate the feedback!

 

Thanks, gray

 

2016 Tacoma compression ratio is 11.8 to 1. That seems pretty high compression to me.

 

That's static compression. And direct injection can make use of higher compression ratios without the need to use a higher octane

 

I still can't believe it. It's 2016 and people still think higher octane means high performance hp adding fuel.

Unsubbed.

 

direct injection changes the rules, because the fuel can be introduced to the chamber quicker