Originally Posted by BlueFocusSE5
What brand and type of synthetic oil are you putting through only 4,000 - 6,000 miles of use and only changing it once per year? That's severe service usage. Cellulose/paper filtration media secured by glue inside an oil filter also might not hold up to a years worth of severe service usage. Something to consider. Be careful.
I really appreciate the concern but with my 4Runner I was seeing about 8000-9000 miles a year up until recently and that mileage dropped in half the last two years and I still just change it about every 10 months and I run M1 with a Puralator PureOne or M1 filter. I also had a compression/leakdown test last year and the results were quite good and still within factory tolerances which is great for a truck with 177k on it. Still as strong as my mom's '99 Limited 4Runner with 90k on the odo.
With the Focus at the moment we get dealer changes @5000 miles for the next 3 years so not going to worry about it til I switch to synthetic when those run out.