I have a 300C with a 5.7. Surprisingly it’s one of the most reliable vehicles I’ve ever owned….besides my Tacoma (if it wasn’t for rust it WOULD last forever).
I recently turned 145,000 miles and looking at new cars (and used) I decided to keep the 300 and “freshen” it up because I love it so much.
The Achilles heel (cam failure) was really the only thing I was concerned with. I put a new OE cam, lifters, rockers and shafts, timing components, and had the heads re-done.
All the roller lifters were perfect, however I did see some lobe deterioration just starting. See pics.
I’ve used 5-w20 Castrol Edge since new. I’ve switched to the Penzoil (born from NG) because a few on here tell me Castrol has a ****ty base stock.
Does anyone recommend I add a friction modifier? My OCI is about 5-6000 miles. I do drive hard but a lot of highway.
If so, what’s the consensus on a good additive?
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