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Old 10-15-2008, 09:49 AM
anE934fun anE934fun is offline
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Location: S.F. Bay Area
Join Date: May 2008
Posts: 6,807
Mein Auto: 2010 335d
Here is my protocol: Start the car and let the engine run with the car parked until the engine idle drops down to the 800 rpm territory. Then drive slowly for about 1 - 2 miles. After the 1 - 2 mile point, normal driving. The initial high revs are programmed in to get the catalyst up to operating temperature as quickly as practical; so I let the catalyst get happy and then driving slowly for the 1 - 2 miles gets the rest of the engine 'warmed up'.
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