Ok everyone, here it is. On a 1990 2.0L OHC sunbird. engine millage unsure because it's not origional. But over 100,000KM And 2002 Chev Extreme 4.3L Vortec 20,000KM Both cars are using the Wix Premium filter 036 equiv of the AC delco PF52, factory filters were the PF47 AC. In this case going over sized helped a great deal with a stable oil pressure, and not much bypass going on. Now the oil used for both car and truck was the 0W-30 syntec (German). Since this setup has been used the same results are for both. 1. Engine running much smoother. 2. Gas consumption is lowered. 3. Noticable increase in engine performance. Final thought of this setup. Well let's just say that I have never been this impressed before. So I'm going to run with this filter and oil all year round and so is my friend. And anyone who asks me about an oil change I am going to recommend this. Thoughts are welcome.