Another point in the cart CarpeDiem posted.
Notice the Mahle new vs. used.
Used, even just 10% used, will capture more particles than a new filter.
When a mechanic shows you a 'dirty' filter and tells you it should be changed to protect the engine, just smile and nod and say no thanks. That 'dirty' filter is actually protecting your engine more than a new one and the impact to MPG is minimal at best, even with a severely clogged filter.
Side note: I ran my original motorcycle filter so long that the bike wouldn't start one day. MPG before and after the filter change was no different. Power increase, on the other hand, was significant.
Notice the Mahle new vs. used.
Used, even just 10% used, will capture more particles than a new filter.
When a mechanic shows you a 'dirty' filter and tells you it should be changed to protect the engine, just smile and nod and say no thanks. That 'dirty' filter is actually protecting your engine more than a new one and the impact to MPG is minimal at best, even with a severely clogged filter.
Side note: I ran my original motorcycle filter so long that the bike wouldn't start one day. MPG before and after the filter change was no different. Power increase, on the other hand, was significant.