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Old 01-19-2013, 10:42 AM
SeanMH-6 SeanMH-6 is online now
Officially Welcomed to the 'Fest
Location: Clarksville TN
 
Join Date: Nov 2012
Posts: 116
Mein Auto: 2002 525i sport, premium
Running higher octane than recommended is pointless. In fact hypothetically you can see worse fuel economy. This is because some engines are not capable of advancing timing enough to burn all the fuel and you have unused fuel being exhausted due to octane rating being higher than what the engine is designed for.
Yes the difference would be 99 percent of the time be unnoticeable, but higher octane fuel does not mean more power.
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