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Old 06-13-2013, 08:35 AM   #28 (permalink)
euromodder
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Quote:
Originally Posted by redpoint5 View Post
I go 12,000 miles between oil changes and don't change my filter either. I see no reason why it would clog to the point of the bypass valve opening. Is there any evidence to suggest filters clog shortly after 3,000 miles on a typical engine?
None whatsoever ...

Shortest oil change intervals in Europe are now 15.000 km / 9320 mls.
20.000 km is very common, and more and more cars are getting 30.000 km service intervals.
VW have ended the 50.000 km service intervals not because of the oil, but because other issues get too much time to develop before they get spotted.

Filters are rather cheap, so they are usually changed during an oil swap - but not always when on a short service cycle, where they then get swapped every other oil change.

The oils are clean, the fuel is clean, and engine wear is / should be minimal.
What would clog the oil filter


On a sooty diesel, better swap the filter along with the oil.
Same when operating in a very dusty environment, where more silicon (sand) ends up in the oil.
When using dubious fuel or oil: change the filter more often.
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