K&N filters can cause the early death of a diesel engine.
If properly cleaned and oiled they are not bad for a gas engine, the problem is most people don't maintain them properly.
With a CTD we have found the OEM air filtering is actually better for mpg than a CAI.
I used a K&N CAI with an additional S&B filter, so I always had a clean, properly oiled filter ready when it was time to change.
After about 5 years, the attitude changed about using CAI from many people that really paid attention to the functionality of them vs OEM with the new 4" thick filters.
So I reinstalled the OEM Box and added a DPP Cool Hose and picked up just shy of 1.5 mpg.
I know this is a different type of diesel engine, but it still uses a turbo, just something to think about before falling for all the salesmanship BS.
If properly cleaned and oiled they are not bad for a gas engine, the problem is most people don't maintain them properly.
With a CTD we have found the OEM air filtering is actually better for mpg than a CAI.
I used a K&N CAI with an additional S&B filter, so I always had a clean, properly oiled filter ready when it was time to change.
After about 5 years, the attitude changed about using CAI from many people that really paid attention to the functionality of them vs OEM with the new 4" thick filters.
So I reinstalled the OEM Box and added a DPP Cool Hose and picked up just shy of 1.5 mpg.
I know this is a different type of diesel engine, but it still uses a turbo, just something to think about before falling for all the salesmanship BS.
