I'll start, I use 91-93 Octane, and Texaco (now known as Shell) and 76 seem to be the better grade of gas over here in Wenatchee, Washington. But I am thinking of going down to the 89 Octane, just to see if I can notice a difference and save a couple bucks.
i use to put 91 in my car all the time, however since gas has gone up I decided to give 89 a try. So far the car seems to be running a little better on 89. hopefully the I'll get more miles out of a tank now. I'll let you guys now what happens.
87 Octane, as liigod stated above, it's what the stock ECU requires. It is what the naturally aspirated engines are tuned for.
Adding higher octane fuel to a NA car does nothing. The higher octane fuels are for the higher performance engines. Engines that are turboed and super charged require the higher octane fuel as it burns slower. This is necessary due to the higher temperatures inside the engine due to boosting.
I fail to see any benefit from adding higher octane fuel.
And I'm not poor for putting in 87, I'm following directions.
Originally posted by squared away And I'm not poor for putting in 87, I'm following directions.
You beat me to it, but ya. The car runs worse with higher octane in my experience. I get crap from people sometimes, but I don't care as they really don't know what they are talking about. I use Shell for the most part. Chevron is better, but the cesspool of the midwest fails to get it.