IIRC, in the United States cars have to be able to run on 87 octane fuel to pass certification to be sold here. Has something to do with the availability of higher octane level fuel reliably across the distribution network, or lack thereof. So I actually don’t think 87 or 89 octane fuel will harm the LC engine.
Toyota might have tuned the LC engine differently such that they want us to use 91 or 93 octane fuel. I think - no data to support though - that if so the consequence of using lower octane fuel would be emissions quality and the efficiency of combustion of the fuel - not the engine’s ability to develop power. This might explain why the Tacoma has the same HP rating as the LC.
I plan to use 91 octane fuel in mine (we don’t get anything higher at my altitude).
Toyota might have tuned the LC engine differently such that they want us to use 91 or 93 octane fuel. I think - no data to support though - that if so the consequence of using lower octane fuel would be emissions quality and the efficiency of combustion of the fuel - not the engine’s ability to develop power. This might explain why the Tacoma has the same HP rating as the LC.
I plan to use 91 octane fuel in mine (we don’t get anything higher at my altitude).
