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Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "What octane gas do you pump?", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
I know that without forced induction (turbo/superchargers) higher octanes aren't necessary, but I was wondering what you guys think on this matter. I have been pumping 87 octane, but pumped 91 octane yesterday and the truck seemed to perform better. So question is 87 or 91? Thanks guys...
I have switched back and forth from 91 to 87 octane, and never noticed any difference in performance. Now I run 87 all the time and the truck runs fine. I think the problems associated with gasoline performance comes more from water and contaminents in the gas station's holding tanks.
__________________ 2005 Toyota Tacoma Double Cab 4X4
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I've run 87 since day one with mine. Never pings or anything and runs great. I'm not so sure that 91 is really 91 anyway. I've seen more than a few news reports and stuff on Discovery Channel and the like that show that all of the gas is pretty similar.
I used to mix half 87 and half 91 when I had a super high HP Corvette. I read in a Vette magazine that you ended up with higher octane by mixing the two. I'll try the 91 on the next tank maybe and see if I notice any difference. This Tundra eats so much gas though, that it's nice to run the cheaper stuff.
85 in Colorado, 87 in Cali. These aren't lexus's, they are trucks. Only reason you have need to use higher octane is for a supercharger or long trips.
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87. Truck runs fine. No knocks or pings ever. Plenty of power and mileage is within specs. (Overall average of around 15.8) No need to waste money on the expensive stuff. One thing. I do buy name brand gas. I stay away from the generic and no name cheap gas. It has been my experience that with the cheap gas you never know what you are getting. I tend to buy Mobil/Exxon.
I have to pump 93 now b/c of the s/c. Before the s/c I ran nothing but 87 and it ran great. I think with the computer that is in the Tundra (closed loop system) 87 would be sufficient.
Originally posted by PnkRock13 85 in Colorado, 87 in Cali. These aren't lexus's, they are trucks. Only reason you have need to use higher octane is for a supercharger or long trips.
Actually, Lexus (at least our dealership) recommended not using 93 on our RX300. They said it runs better with 87.
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Originally posted by PnkRock13 85 in Colorado, 87 in Cali. These aren't lexus's, they are trucks. Only reason you have need to use higher octane is for a supercharger or long trips.
The Lexus SUV’s have the same 4.7-liter I-force v8 with 9.6 compression that we do and in there manuals they recommend 91 octane gas!!!
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Just curious if anyone with the supercharger has tried running 87 octane? Any loss of performance, pinging, ect. ?
__________________ 2005 Toyota Tacoma Double Cab 4X4
Speedway Blue Short Bed w/TRD Off Road Package, 2006 Tundra Wheels with 265/75R16 BFG AT KO's, Python 2-Way Remote Starter, Color Matched Hard Tonneau Cover
low octane combined with a s/c(or anything that causes high compression)=pre-ignition=detonation=engine/spark plug damage...very dangerous/expensive...
Yes, I consider mine a Lexus LX470 with a bed and a 50% discount. I can definitely tell a difference between 87 and 93. Mine will run interstate speeds fine on 87, but I prefer 93 for around town driving for the performance.
Of course I get about 18 MPG on 87 and 12 MPG on 93.
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Have ran 87 since day one. Average close to 20 mpg combined driving, actually more around town than anything, and it runs great. Plenty of power in the V6 considering I never do tow anything.
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What octane gas do you pump?
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