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Old 12-23-2012, 04:28 PM
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AutoUnion AutoUnion is offline
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Originally Posted by dpwr View Post
my real world test results, just did full tank with 87 recently and I get exact same mileage as with 89 and 91... I also don't notice any difference in power, nothing is knocking, everything runs as smooth as it can be... draw your on conclusions
Do you have a N52 528i or N20 528i?

If you have a N52 528i, I can believe you. The 328 loaners are the dealer always are filled with 87 and they seem to run fine.

The high compression, turbo 2.0T though? Runs like **** on 87
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