20 HP / 14 lb-ft torque gain from 91 Octane gas on Tacoma Gas Engine 2.4 i-Force (dyno tested by Stillen)

[tacorancher]

I just added bunker fuel which is found in large marine vessels

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[Drifte]

Also there is an oil additive/lubricant for race engines that run on alcohol. As alcohol doesn’t have any lubrication properties to it, unlike diesel or gas. Mind you, alcohol fueled race engines are very specific and that really doesn’t apply to blending of alcohol and gasoline to create pump gas.

You can certainly run additives, I wouldnt say its required but ideal for cars that sit. We have been experimenting with mixes the last few years of ethanol, nitro methanol, mtbe such as c85, really cool stuff. I wouldnt say the engines are any different, but we are able to run more boost and higher compression with these fuels. And a little nitrous to get things moving...but all fun stuff.

 

[Rocko]

So far the engine is driving like thick, creamy butter. Decadent.

Now throw some 5w30 in it. So smooth........

 

[32spoke]

Now throw some 5w30 in it. So smooth........

I run 5w30 synthetic, but it seldom reaches freezing temps where I live

 

[Rocko]

According to STILLEN (@RoelStillen) Dyno Testing. 14 torque gain as well




87 vs. 91 Octane Fuel: STILLEN’s Kyle Millen reveals how fuel octane impacts the Tacoma’s 2.4L turbo engine, showing a 20-horsepower gain with premium fuel. Learn about octane ratings, real-world dyno results, fuel costs, warranty considerations, and why 91 or 93 octane is essential for maximum power, efficiency, and engine longevity—especially with TruControl or other performance upgrades. Don’t miss this must-watch guide for Tacoma owners!

Key Topics Covered:

What is octane, and why does it matter?
Impact of fuel quality on turbocharged engines.
Dyno-tested results: 87 vs. 91 octane on the Tacoma.
Why cheap gas could cost you more in the long run.
STILLEN's official fuel recommendations.

Thanks for taking the time and posting this up for us. I have been running premium since pretty much new and I could tell that the motor liked it. Really impressive motor actually.

 

[Sandeep1994]

Difference i noticed running 87 compared to premium is
. Engine sounds better .more smooth . Didn’t noticed any diff in power

 

[Tacocho]

How many of you guys running 91+ feel a difference in power?

 

[Slappy]

my butt dyno suggests 91 gives good power over 87 seem to have more spunk after filling up with Shell 91 cali winter blend mind u
But really more important is using a high detergent fuel , ordered a case of 12 oz chevron techron 4 when i can't find a Chevron or a Shell station

 

[32spoke]

my butt dyno suggests 91 gives good power over 87 seem to have more spunk after filling up with Shell 91 cali winter blend mind u
But really more important is using a high detergent fuel , ordered a case of 12 oz chevron techron 4 when i can't find a Chevron or a Shell station

Sloppy from Novato- I have a biz in Novato and grew up there… it is hard to notice gains.
I used to own a Buick grand National… and the fuel quality and engine or suspension mods were best proven at sears point… MPH and ET were great indicators of speed/quickness .

 

[tacorancher]

How many of you guys running 91+ feel a difference in power?

Not sure about power as I don’t goose it that often but without a doubt more gas mileage - like 2mpg or so - the 91 octane is able to push 60 pound tires nicely

 

[Tacocho]

That’s honestly pretty good. Almost makes up for the price difference

Not sure about power as I don’t goose it that often but without a doubt more gas mileage - like 2mpg or so - the 91 octane is able to push 60 pound tires nicely

 

[tacorancher]

That’s honestly pretty good. Almost makes up for the price difference

Engine also not as loud or rough when idling

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