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04-18-2006 09:35 PM #1
Er... which Octane to use in California?
Folks, I read the manual and searched this forum and still can't figure out the minimum octane for my 2000 M5. Chalk it up to a bad 6th grade experience, but can one of you help decipher what the manual says? If I run california 87 octane (lowest cost unleaded) and I going to cause problems? Must I pay for the 91 octane?
Thanks for your advice.
04-18-2006 10:43 PM #2
04-19-2006 04:38 PM #3
Re: Er... which Octane to use in California?
From many of the BMW technicians and service advisors I have spoken with, many of the infamous carbon build up problems with the M5 are caused by people not consistently using 91 octane gas from top tier refiners like Chevron, Shell, 76. Top tier is a voluntary formulation of gas with additional cleaning agents meeting cleaning guidelines defined by BMW, GM, Honda, and Toyota. I know in the Bay Area Chevron, Shell, and 76 meet these guidelines. The other cause is running the car when the SES light is on and not getting emissions components (sensors, etc) fixed promptly causing the ECU to run the fuel mixture too rich.
I say if you can't afford the 91 octane you really can't afford to drive the car unless you want to deal with the potentially very expensive maintenance costs that can occur by running cheap gas.
04-19-2006 06:34 PM #4
04-23-2006 11:55 PM #5
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