Regular grade fuel in the Toyota 1GR-FE engine?

[06RANGER]

A friend recently purchased a 07 FJ Cruiser. The majority of his mileage consists of highway commuting. What harm will come if he uses “regular gas” as opposed to “premium” as recommend by the owner’s manual?

 

[Fatboymoe]

06Ranger,
Look at the wording in the Toyota's owners manual carefully regarding fuel type and grade. I don't have my manual in front of me, but 87 can be used. It's all I use. I couldn't tell the difference between the different grades from a mileage standpoint. If it was summer and I was going to tow something, I would use 91. Others in different forums say max H.P. is with 91, but my butt dyno couldn't tell the difference.

 

[06RANGER]

Quote:

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06Ranger,
Look at the wording in the Toyota's owners manual carefully regarding fuel type and grade. I don't have my manual in front of me, but 87 can be used. It's all I use. I couldn't tell the difference between the different grades from a mileage standpoint. If it was summer and I was going to tow something, I would use 91. Others in different forums say max H.P. is with 91, but my butt dyno couldn't tell the difference.

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What about the onboard computer sensors?

 

[Fatboymoe]

The onboard sensors on my truck must work pretty well. I have never heard it ping, ever. I read somewhere that the difference between using 87 and 91 octane fuel on a dyno was 10hp. Maybe, but I couldn't prove that. Check out Toyota Nation forums for 05+ Tacoma's. I think I read it in there somewhere. There are lots of threads on what octane fuel to use in the V-6.