Alaboat
Petty Officer 2nd Class
- Joined
- May 21, 2015
- Messages
- 129
Got about 23 hours on a reman long block 4.3. Break in oil was 15W30 but at 20 hours I changed oil and filter and used SAE30 Rotella. Yesterday on the lake and pulling tubes, I noticed oil pressure running about 75 PSI at about 3500 RPM which before changing oil, was running about 62 PSI for same engine RPM. Is 75 under a heavy load too much for this engine? Is SAE 30 too thick for this engine?