What gas used on TRD 3.4l

I just bought a 2004 tacoma TRD 3.4l supercharger.....can regular gas 87 be used . Will regular gas damage the engine or will it just cause to have less power?

 

yep, regular ol' 87 unless you have some sort of supercharger or turbocharger in there (unlikely).

 

I use 91 In my 3.4 because it's not that big of a difference in such a small tank.

 

regular 87 w/10%ethanol--if you can find REAL GASOLINE-use that-your mileage will improve.
Cost vs Mileage is about the same.
I have used 93 octane--could not justify the extra cost.
Have also tried different brands in my area-EXXON seems to run the best for me.

 

I have been using 90 octane marine gas (Real Gasoline) that Is available in my area. Newrtoy if correct. The price/performance/mpg difference equals out to paying for mid grade fuel.

I noticed my truck runs quite a bit better on real gas, plus it does not have that crappy smell from the ethanol.

I went from 17 mpg to 19.5 mpg when I made the switch from 10% ethanol to 100% real gas. Thats about 13% improvement in MPG! The cost averages to about 13-15% more per gallon than regular 87 octane..........

 

it is about the same cost wise, lower octane, a little lower mileage, the good stuff, more MPG, but, in the end a little more out of pocket for the non ethanol stuff, they are smart with the pricing, used to be not such a big difference, and it was advantageous to run the good stuff...but not anymore...


if you are towing or hauling heavy loads, then go with the good stuff at those times...

 

Octane has 0 to do with power,0 to do with mpg. Its a measurement of the fuels requirements to flash. High octane needs a hotter temperature before it ignites. It doesnt affect the energy contained in the fuel itself. Higher compression engines create more heat as they compress so a lower octane fuel will ignite early and cause knocking.

An engine capable of creating higher power due to compression will need a higher octane fuel, but a lower compression engine will see no benefit from running higher octane. And if the engine/ignition is weak you may actually see numbers drop. 1 octane isnt cleaner than another either, again its unrelated.

And octane requirements change with elevation. The higher you go the lower octane you can run. Up high where i live our 'regular' you cant even find down at sea level. And the high octane is only 91.

Run regular, if you get knocking go up a grade. If youre running a turbo or sc, start at mid and see if you need to go up a grade.

Now a modern engine that 'needs' higher octane will usually run just fine on lower. It will retard spark to the point that it will stop the knocking before you notice it. By detuning itself you will see a minor change in hp and mpg. But being that a 500hp engine makes about 50hp 99% of the time (making up numbers here) odds are you wont notice unless you're hauling or otherwise pushing the engine beyond the day to day driving requirements.

Ethanol otoh carries less energy, the more ethanol you run the lower your mpg and power output will be. Ethanol is junk, but thanks to regs its everywhere.

 

^^^ thank you! i wasn't sure if i wanted to open up that can of worms. but Indy is 100% correct. running 93 octane gas in an engine designed for 87 does nothing except make your wallet thinner faster.