The gauze type filters do flow better..............at 3500 rpm and up.
When I first got my 03, I saw a flow chart comparing the Donaldson vs the K&N filter(I think it was KN). They had almost identical flow numbers until 3500 rpm then the K&N flowed more. Seems your paying 300 bucks for a filter that does the same as the original. IMHO.
The tech at my dealership said he had a truck with 140000 miles and still had the original filter, the filter minder was just about closed, so he should have changed it sooner. I think if your not in a dusty area the filter should go 60000miles easy.
When I first got my 03, I saw a flow chart comparing the Donaldson vs the K&N filter(I think it was KN). They had almost identical flow numbers until 3500 rpm then the K&N flowed more. Seems your paying 300 bucks for a filter that does the same as the original. IMHO.
The tech at my dealership said he had a truck with 140000 miles and still had the original filter, the filter minder was just about closed, so he should have changed it sooner. I think if your not in a dusty area the filter should go 60000miles easy.