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Old 08-21-2012, 10:07 PM
paperplane94 paperplane94 is offline
Officially Welcomed to the 'Fest
Location: Los Angeles, CA
Join Date: Jan 2012
Posts: 933
Mein Auto: 1989 525i M20B25
Originally Posted by Byork7 View Post
Well cool, copper plugs are way cheaper haha so that works out great. Good advice on the chips, I was unaware so thank you. Without a chip I can use normal unleaded, not premium or the mid grade correct?
Yup, just like the 1989 owners manual says:

The stock ECU has a stock tuned chip from the factory. The stock chip works with 87 AKI.
The performance chips they sell out there (legitimate ones) are tuned to work with 91 AKI.

So, if you buy a performance chip, you are just replacing the old one.
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