Highfinance97 said:good question also what is the recommended mileage for the filters since the stock filter is a hydraulic filter????
I go by fuel pressure. When it drops off by 2 PSI cold and idling, I replace it. I found out the hard way that when you use the 6604, 2 pounds drop means it is getting close. My average for the 10 micron was 5000 miles. seems to be about 3500-4000 for the 6604.
124,000 and counting. FASS on since 40,000. Never missed a lick. .
BHaner said:Wow... Only 4000 miles!!?? That filter is like $90! I don't think I even noticed a drop at 20,000 miles!
ThomasLawrence said: