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|3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.|
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| Originally posted by htp.bmw@Aug 15 2005, 12:37 PM |
Alright. ive been reading around on forums that most people put 87 octane in thier bimmers. ever since ive had one ive been putting in 91 octane because I want to treat her well and thats what the last owner put in her. ive read about people putting in 93 octane but what about 100 octane? doe you need mods to do it or could i try it once.. (once its expensive)?
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| Originally posted by filter27e@Aug 16 2005, 10:04 PM |
A lot of people say that their cars run better with 9x octane gas when the car is designed to run on 87. The only way that your car could actually have increased performance with a higher octane than it was designed for is if the carbon buildup inside your cylinders is actually thick enough to change the compression ratios. A couple of people on here explained it already so I'm not going to continue to beat the topic to death, just try reading on howstuffworks.com about octane ratings.
And where in the world are you people getting 100 octane fuel? And 98 octane leaded? Isn't that illegal except for on racetracks? Leaded is terribly polluting.
Oh and htp.bmw, you still parting out that bimmer or what?
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