Originally Posted By: Garak
Originally Posted By: Gokhan
Of course, Delvac has far better wear protection than Rotella and Delo because Delvac has trinuclear moly ("trimer additive technology" as described in their previous, CJ-4 data sheet), whereas Rotella and Delo scrapped moly all together in CK-4 to reduce ash. Rotella also has the outdated calcium-only detergent technology with no magnesium.
Moly in levels we see in most PCMOs and HDEOs are not at AW levels, trimer or not, they are at friction modification levels. Every formulator on this site and every piece of literature out there will verify that. There are Rotella variants with magnesium additive packages, by the way. Look
here.
Originally Posted By: Gokhan
Rotella has definitely fallen far behind the competition with CK-4. I'm waiting for Delvac's response on the base-oil oxidation. I doubt the Rotella tests are right. I'm pretty sure Delvac has a quality Group II+ base oil. As I pointed out, Delvac 15W-40 CK-4 has A_Harman index = 0.982, which means virtually no VII.
I hope you don't tweak your back with the logical flip flopping over a couple threads here. Now, you have no trust in Shell testing Delvac and finding it wanting. Now, I would suggest that it's a batch variation, and still have complete confidence in Delvac. But, something clearly happened. Shell wouldn't say what they did without concrete, verifiable test results and clearance from their legal department. So, you don't believe Shell's test results on one lot number of Delvac, but in this same subforum, you call out Rotella over a gasoline flat tappet issue, when the person was using high spring pressures and did not follow break in procedures and use a dedicated break in lube, which should have been done? This is a deficiency in Rotella?
At least one batch of Delvac was found not meeting the requirements for license and builder approvals, and you don't believe it. Someone uses Rotella as a break in lube, which is not its purpose, provides one anecdotal failure, and you condemn the product based on that?
Yeah, Gokhan doesn't know what he is talking about as usual. One day he LOVES PYB the next he loves M1. Go figure