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from my experience that 5w30 Pennz UP will make 5.7 run smooth as silk.Installed the tailgate assist, a stuby antenna, and added back a stock alpine sub that was missing when I bought her.
Also changed the oil with penzoil UP 5w30 and a wix xp filter. I don't trust what the dealership put in there, even though it was probably fine.
Edit: forgot to add, I also put half a bottle of Liqui Moly truck treatment in with my oil change since Amazon has it for so cheap
from my experience that 5w30 Pennz UP will make 5.7 run smooth as silk.
what stubby did you get? and does it work with a s* out here in AZ?? and did it make a lot of unexpected noise at high speeds??? thanks!!!
Im a bad influence lol.After posting about doing an oil change a couple weeks back and guys berating me about using MMO and 5W20, I did a ton more research. Still don’t think MMO would “ruin” the engine but decided to play it safe. Previously used a K&N filter, PUP 5W20 and MMO, got oil pressure dropped 8-10psi from what it was before.
Swapped to RP filter, PUP 5W30 and Lubeguard
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Then installed the Vararam I got from @ThunderMug95. Need to order a new filter and thinking about ordering the smooth black or orange lid too
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Also got my UPR catch can today. That and the Bilsteins/UCAs will go on this weekend
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