Originally Posted by A310
Originally Posted by Patman
I have also heard that bypass filtration is good down to about 1 or 2 microns. Think about it, why would anyone bother to install such a system if it was only going to filter out particles of the same size as a regular oil filter? So if in fact it's filtering out particles this small, I'm afraid it probably makes any UOA results pretty much worthless, other than looking at the condition of the oil itself after all that time (but even then, with that much top up and with different oils used, what did we learn here?)
From this UOA I learned that:
1. I don't have to change the oil and can continue using it. (Next UOA in 10,000 miles)
2. Oil is still dirty.
3. The TBN has improved.
4. Wear metals have decreased,
5. Insolubles have decreased.
6. Fuel % has decreased.
7. Viscosity has increased. (Added 1 qrt 15W40)
8. If you take your car to Jiffy Lube, make sure your getting what you paid for.
Contrary to popular belief, you can't filter out the wear metals with a bypass filter, they will continue to increase over time. The only reason that the wear metals have started to decrease on this engine is due to the 2000-2500 miles bypass filter changes. Sump is 6-7 qrts and the replaced oil is 7 qrts in the 10,000 miles that I have owned it. Lastly I can confirm the reason my bypass filters are plugging up in 2000-2500 miles is because the engine oil is still dirty. I'll take another sample in 10,000 miles with a particle count to confirm whether or not the oil cleanliness has improved, I'll know from the frequency of the bypass filter changes.
Thank You sir for this UOA and all your hard work. I am learning a lot from you