- Jan 4, 2011
- Columbus Nebraska
So, on my classics, which are only driven in warm weather, and usually well warmed up when driven, but only get around 1000 miles per summer, can I leave the Napa gold filter on for 2 years, or would I need to go to a Fram ultra. I have read that the full synthetic media will hold up for much much longer in oil than the cellulose/synthetic media. Of course I have also read that it is water in oil that really causes the cellulose to deteriorate, and I don't think I get much if any of that with my usage.