Saw these in the Summit store online

[spareparts]

rotella!

[THEFERMANATOR]

Originally Posted by spareparts

rotella!

Since 2011 when diesels started using DEF they reduced the ZINC and phosfourous levels in Rotells as well. It is alot higher than gas oil is, but still nothing like ROTELLA was in 06. Pre emissions Rotella was around 1300 PPM of ZINC, now it's around 800 The minumum for a flat tappet cam during break in is 1100 or so, and around 900 for regular oil changes(unless you have a modern hardened flat tappet cam, and then they say a properly broke in cam will live an OK life at 750). To put it in perspective, I believe modern S rated oils are around 300-450 PPM of ZINC. VALVOLINE XR racing oils are still around 1250-1300 as well as a few other performance oils.

DISCLAIMER: My numbers may be off as it has been awhile since I researched oil formulation changes. And this is for US based products, international markets can still have higher levels of ZINC and PHOSFOUROUS since they don't have our messed up emission regs and systems.

[spareparts]

I was told to use the api cj-5 rotella it is suposed to be the high zinc. I Dont know for sure, I'll call their customer service next week, they have an excellent tech line

[aussie]

im asking about solid lifters with the oil hole in the bottom as I did read in the big banger forum that the cams do wear when you regrind them mainly because of not enough zinc in the oil if you want to change the subject to oils at least let me start a thread lol

[THEFERMANATOR]

All I have read is debate over the hole in the lifter facing helping or hurting. COMP CAMS makes a lifter design that gets more oil to the lifter without drilling the hole in the lifter face. it has a groove cut in the side to channel oil down from the galley to the lifter. This way you keep a solid face, but the channel will dump oil down.

[smokeonthewater]

just get roller lifters... done and done

[aussie]

Originally Posted by smokeonthewater

just get roller lifters... done and done

I would use rollers if you can find me a cam to suit