Originally Posted By: mobilaltima
buddy of mine got a 2011 Dmax, ive been running Delo 15W40 in it,(i do all his maintenance) but ive always heard Delvac is better at viscosity retention, soot holding capacity, etc. is one oil better than the other? was thinking of using rotella in the 2.5 gallon jugs, since thats exactly how much oil a dmax takes, but never been a big fan of rotella. currently has Delo and a Napa gold filter, and he'll be doing a UOA at 15,000 miles. truck has EGR, which puts a good amount of soot in the oil, but we will be doing EGR/DPF delete and 5 inch exhaust soon. so, which oil is better, or is neither better than the other?
What is the OCI plan? What is his UOA committment? What are the condemnation levels?
If he's going to run with the OLM (or less), then any CJ-4 fluid will do an equally decent job. I've seen a LOT of Dmax UOAs, and I can assure you with no uncertainty that it simply does not make any difference. I have seen great UOAs from Delo, Delvac, Rotella, Premium Blue, Tection Extra, Long Life Gold, etc. Don't fall into an oil-brand-biggotry trap. The Dmax is one of the best wearing light-duty diesel engines around; it simply does not care what goes in the sump, as long as you use a properly spec'd fluid. You might as well buy whatever spec'd fluid you can find on sale.
If he is into extended OCIs, then there are plenty of good synthetics from those companies, and others such as Amsoil and Schaeffers.