Originally Posted By: Linctex
Originally Posted By: FlyNavyP3
I've run a wide range of filters on my Lexus from a rock catcher to a Motorcraft to an Ultra, I've never been able to see any differences in my UOA wear metals
Luke,
The variety at which you experiment (oils and filters) is not just entertaining,
but blows huge holes in all kinds of old fables and folklore!
There was one very long Amsoil study (often linked here) in a modern Camaro for about 20,000 miles (UOA every 1000 or so miles) and insolubles did go down a tiny bit when a filter change was done.
Any of my ramblings are far from definitive or scientific in their scope. But at a macro level seem to point to the fact that SN oils are all generally pretty good at modest intervals. It also points to the apparent truth in Dnewtons Signature line which I'm paraphrasing to say "Conventional vs Synthetic isn't about which one is better" Synthetic oils can have their place where a low noack is required or high temperature oxidation stability is required or for long drain intervals. Conventional oils can be equally effective at reasonable drain intervals. Drain interval is a very uses specific metric determined not only by the individual engine but the conditions under which its operating to include quality and type of fuel as well as the usage of the vehicle. I don't propose that the PYB would be a good candidate for 15k OCI in my application but it wasn't woefully overdue for a change at 5,000 miles either. I just enjoy gathering data and experimenting, the yearly clearance deals and Amazon sales allow me a wide variety of oils to run and collect macro data on. I only wish that I had a fleet of about 30 of my Lexus so that I could run 30 of these oils in individual cars for 200,000 miles on the same oils and filters to collect data. Unfortunately I have one car and a lot of different oils so we just get singular data points on those oils.