Originally Posted by Patman
Originally Posted by OnTheRocks
Fram may claim "up to 20,000 miles", but that doesn't mean that every car will be able to use the filter for 20,000 miles. Maybe in laboratory testing, 1 engine ran this up to 20,000 miles.
I disagree. If they say up to 20,000 miles, you can bet they tested it out to well beyond that so that in some perfect case scenarios it could probably do 30,000 miles, maybe more.
Yup.
Jay said that is why they upped them from 15,000 miles with no changes.
The testing they had been doing (and I am sure it was real world) showed that 15,000 miles was not an issue, so 20,000 miles is the rated mileage, and you can bet there is a margin of safety built into that.
We have a few TG posted here with 20,000 miles with no visible issues (yes, I know, that is not scientific). Many XG with 20,000+ miles with no issues.
I have always said if I ever had any OPE that needed a filter, I would put a Fram XG on it and never change it again.