Which octane is everyone using

93, running the OV Premium Tune with 5.29 Gears, and 35s, full skids, a HC rear bumper, and a prinsu rack and still getting 17.5-18 mpg on the highway....the OV tune is worth its weight in gold if you ask me.

 

4.0? cause my 02 ranger also ran like battered shit on anything higher than 87 lol.

 

Yes sir, 4.0. Miss that truck man, wish I could’ve kept it… Very reliable and capable truck.

 

85 here in Colorado, no issues. If I go to lower elevation, or towing long distance, I'll switch to 87. With a naturally aspirated, non-turbo'd, non-tuned, V6... i'm not wasting the money for above 85 at this elevation.

 

My '93 MR2 turbo requires premium fuel. With 91octane it would sometimes initially stumble when mashing the throttle but with 94 octane there is zero hesitation or stumble and a slight increase in mpg and it is enough to cover the additional cost of 94octane gas.

With a modern day more complex 3.5V6 I figure there is likely a less dramatic difference between regular and premium gas, however since I am keeping my Tacoma long term, using 94octane ethanol free premium gas is the plan.

 

I can't wrap my head around some of the comments saying it ran worse with premium over 87. Makes no sense to me

 

87

 

Yeah, it makes no sense at all. It just proves that seat-of-the-pants dyno's only reinforce the drivers initial bias.

 

I think it totally depends on elevation. I live at 4500 feet and I always run non-ethanol in my vehicles. I switched to premium (91 octane) at the start of the summer hoping to do better on mpgs. I ran 6 tanks of premium and averaged between 18.8-20.2 - I don't have a lead foot and try to drive fuel consciously. I switched back to 87 non-ethanol and have run 3 tanks since. I now average 21.5-22. I drive about 60/40 city for reference. I think if I was in a lower elevation, the results would be switched and maybe even better on higher octane.

 

87 octane works fine.

 

i get all the gear hunting when i fill up with 87. goes away with premium.

 

Yeah, this is because of E0. Not octane. I live at the same(ish) elevation and I've noticed the same thing with E0. E0 has more energy per gallon.

 

87. It's not a Ferrari.

 

It’s a Lexus engine that originally was tuned to 91.

1GR FE also benefits from higher octane fuel.

 

Yeah, my 1GR did noticeably better on premium.

 

I want the most out of my engine so I go for ethanol free gasoline rather than worry about octane...

 

91 octane was E0 as well. Better mpgs with 87 E0 vs 91 E0.

 

Yep. Also, there are different power ratings between 87 and 91 in certain models, such as FJs, 4runners and 2nd gen Tacoma’s.

 

Thats interesting. My local only has E0 89, so thats the basis of my experience.

 

Tundra gets 87
Rav4 gets 87
Tacoma get 93 per KD Maxx tune