Ah. TY. Yeah, it doesn't seem like there is much of a need for Amsoil with how well the STFS comes out.
The best oil filter is a good air filter. If you use a paper filter and keep a good routine with changing it, your oil will benefit greatly.
I agree. But I would caution those who think that frequent air filter changes are "better"; that's patently wrong. This depends upon how you're defining a "good routine" of air filter changes.
Air filters get more efficient as they load up, and overly-frequent changes can be very detrimental.
Approximately 90% of the contaminants an air filter will pass in its entire life cycle are passed in the first 10% of it's life. If you change more often than necessary, you're just inducing more dirt ingestion than if you had left the air filter in service for longer periods.
See this article by our own Jim Allen:
www.trailerlife.com
Example ...
If you had a new car and drove it 100k miles, consider these two "routine maintenance" choices:
1) change air filter every 25k miles per OEM schedule
2) change air filter at 50k miles
- in example 1, you would have 4 air filters (OEM plus ones at 25k, 50k, 75k). That's four "new" filters and four early life cycles of high-ingestion rates.
- in example 2, you would only have 2 air filter (OEM plus one at 50k). That's HALF of the "new" filters and therefore half of the high-ingestion rate which comes early in the filter's life.
Unless you live in a super dusty area all the time, OEM air filter changes are grossly over applied. I installed an air intake vacuum gage from Wix; the cost of it is easily paid for by saving a few filter changes and now I know with certainty when to change the filter and don't have to guess. And my engine is all the better for it. Most air filters have far more capacity than people give them credit for.