Why do you want to change? We took a vote
and ram forum chose that oil as number one, m1 as number 2, amsoil as number 3, and redline as number 4, nothing else is very close. See the oil filter thread, royal purple 20-820 and fram ultra 3 are top choices, see page 93 and page 1 on that thread. Main thing use a synthetic paper large size and not paper. If you want to just boost that pennzoil, you can just add lubegard biotech and protect that cam a little more with moly. If you have hemi tick, the conversation becomes different, but that PUP is a top oil for the hemi. Other things to look for is high moly, valvoline ep didnt get the votes, but the new formula is high moly. PUP 5w30 and some biotech paired with a synthetic filter is a mighty fine choice imo, close to what you are doing now.