100k-150k miles before it goes out. If you hit 150k and it still is working, change it anyways. Better save than sorry!
Not all 328i s are the same. You need to provide much more specific facts about the 328i in question. Hard question to answer without knowing more about the particular year, specs, and if you are going to follow the manufactorer's maint. scheduled or other recommended maint. schedule many of the popular BMW sites.
The BMW 328i sedan gets 18 miles per gallon in the city and 28 miles per gallon on the highway
The 1996 BMW 328i holds 16.37 gallons which is equivalent to 62 liters. The vehicle is rated at 23 miles per gallon in the city and 31 miles per gallon on the highway.
250000
600
You can expect to get an average of about 175,000 miles out of the 2004 Tahoe. This varies with the type of care the vehicle receives.
With proper maintenance probably 200,000 miles
My '93 has 230,000 miles so far.
16.1
In a typical spinning class, one can expect to ride around 15-20 miles.
250k
You can expect between 200,000 and 300,000 miles from a Honda Odyssey. The bottom line however, is that this will depend on how you look after your car.