The book says use 91 octane. Is anyone out there using the regular unleaded (87 octane). I know they have the car set up for 91 octane (better performance, effeciency, emissions, etc). Would using the 87 octane really hurt it? I'm not tricking the engine out yet so I'm just wondering.

 

Better to run 91+ unless you have an emergency. Your computer will constantly have to react to the pinging of the low octane gas by retarding the timing. Your fuel economy will suffer. Over time, the pinging that happens before the computer reacts will cause a problem.

I notice a considerable difference in drivability with 87. I wouldn't run it that way often.

-Trevor

 

Use the 91+ I mean for the xtra buck or two you'll spend at the pump it will be worth it's weight in gold if it prevents something ever happening down the line. Preventive Maintenence.

SuDZ

 

Please follow the guidelines in the manual --
They are there for good reason.
They shouldn't be questioned.
Don't be cheap on maintenance

 

used 87 and you can tell the car no likey. Also, NEVER BUY RACETRACK GAS.

 

For no reason, and whenever gas price is high or low, I use both. I haven't been able to detect any difference in mpg, smoothness, whatsoever. Different gas should make a difference but maybe too little for me to feel it. I may use 91+ more often or always, just for peace of mind.

 

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