I'm considering purchasing a 06' 4Runner with the V8. All of the "additional features" require that 91 octane (premium) be used. Then I look at another vehicle same year/engine and it said 87 octane. What gives? Can you use the 87 and not harm the engine? Is it worth using Premium? Does using Premium help in the MPG issue?


Thanks,
KLJ.

 

Hello,My 91 runner says 87 oct or better I run 84 regular
it works fine..My truck is 3.0 V6.
I have tried the premium gas a few times didnt notice any diff. AT All
With a V8 ya might but if you cant tell a diff. Run what works Gas is alot of $$$ now so check it out