Engine Vibration and Gas type (Regular or Premium)

googly · 08-16-2006, 10:50 PM

OK guys.. an update on engine vibration or rough idlle in N and P.

the dealer thinks its bad gas, wants me to use regular. Cleaned fuel system and thinks regular gas will solve the problem.

What do you think?

Tankota · 08-16-2006, 10:56 PM

Quote:

googly previously said:

OK guys.. an update on engine vibration or rough idlle in N and P.

the dealer thinks its bad gas, wants me to use regular. Cleaned fuel system and thinks regular gas will solve the problem.

What do you think?

Odd recomendation by a dealer, since the prefered gas is 91 octane for the FJ... But hey, maybe he realy does know something about the vehical.

VooDooDuner · 08-16-2006, 11:22 PM

Only VERY high compression engines, or super charged engines, or turbo charged engines need high octane fuel. Toyota wants you to think the motor needs 91 octane so you think you bought a high performance vehicle. This is the same engine as my 2005 tundra and it doesn't say 91 octane only. I have been running 87 octane from day one because there is no need to throw money out my window when I can get navigation with the money I am saving.

VooDooDuner · 08-16-2006, 11:23 PM

My Quadzilla there, however, does require 110 octane fuel.

Tankota · 08-16-2006, 11:31 PM

Yeah, but I doubt it's the octane of the gas causing his problems.. The FJC runs perfectly fine for thousands on the recomended 91.. and in runs fine on 87 too. If 91 octane is causing his problems there's something else wrong with the engine that it can't correctly adjust for it.. switching octane is a band aid they don't have any real idea what's going on.