Originally posted by bmw4life@Mar 13 2005, 09:44 PM do the 92-98 3 series requir 91octain cuz i have a 2005 325 and it requirs 91 and im getting a 94confertible i wasent sure if you need to put supreme in that or not
Mid grade will work fine. My owner's manual says you can use premium for a little more performance and a little less mileage. I used premium for about two months and didn't feel any performance difference or mileage difference. Now that I have the performance chip, I use 91 octane as prescribed by the manufacturer of the chip.
__________________ 1995 325I, window tint, K&N, debaffled airbox, BMW #104 wheels, Nighthawk low beams, smoked side markers, smoked corners, smoked taillights, M3 stlye heated mirrors, various interior bits, Bosal cat-back.
Using higher octanage than that required by your engine/software specs is pretty much a waste of money. You will not get much out of it. Cleaaner fuels, yeah, but not much of a difference. I run 91 because that is what my nanual says and my car is pretty much stock. Sometimes I get 93 because that is all they have. I have never gone under 91, though. The previous owner told me he put only 90 in it.
To do list:
UUC System U TDM- 3/05
M50 manifold converstion 3/05
off to the tuning shop for custom software 4/05
Cams/lightened flywheel, throttlebody........ well lets see what happens
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