My 2018 Nissan Sentra has 172,000 miles on the engine

I just purchased it from the second owner who drove about 20,000 a year for 8 years mostly freeway miles

So first thing i noticed was the PCV valve needed to be replaced

Done! Oil was clean and changed about 1500 miles ago with full synthetic OW-20

Since I added the prolube it appears to be running somewhat quieter the valve ticking has subsided I’m hoping the piston rings are not broken or worn out so maybe this prolube will help with that too

I run this in 8 of my vehicles, and every vehicle is noticeably smoother and quieter. I also use this as assembly lube and it works very well. I had a small block Chevy overheat this week with the temp exceeding 300° for 14 miles until I made it to a parts store to buy a radiator cap and I'm convinced it didn't lock up because it had Prolube in it!

My 92' Silverado 117k original miles runs cooler after adding pro-lube. To me, that proves smoother interaction of oiled surfaces within the engine. It also significantly reduced the"hemi-tick issue on my 2018 RAM. It's in everything I run now.