The fuel filter is in the fuel tank and is normally replaced with the fuel pump is replaced.
How often should you change the fuel filter?
Change the oil filter every time you change the oil.
How often need to change the fuel filter for a 2001 BMW 325i?"
Change the oil filter every time you change the oil.
I change mine every 35K.
The word filter explains it all, alike your house AC filter that you change so often to ensure you stay cool, I recommend that you change your gas filter twice a year.
Chances are you are using engine oil with a high vapor rate. The vapor, by way of the PCV valve, is being returned to the intake causing the oil on the filter. Change your filter more often or change the brand and/or grade of the oil. Let me guess? Its a 2.5 , Rings are worn creating excessive blow by in crank case.
You should change a furnace filter every 2-4 months.
You Need To Change Your Air Filter Every Ten Thousands Miles ( 10,000 ). Unless You Drive In A Dusty Area It Is Best To Change More Often.
when it is dirty
Change it with every oil change.
I recommend every 50,000 miles if it does not have a permanent filter.