Originally Posted By: wanttoknow
i just bought a Frightliner, with a 515 HP S-60 Detroit , just asking what would be the best Dino oil type to used Rottella, Delo, Mobil Devac?
Welcome to the site.
Sir or Ma'am, I have some good news and some bad news for you ...
There is no such thing as the "best" oil. Or filter. Or tire. Or thoothpaste, wine or anything else.
The problem is not the topic; the problem is that you have not well defined the question. When you have such a broad based querry and don't limit the conversation to specifics, you're going to be a WIDE series of answers.
You need to define your:
Severity of use
Intended maintnenace regime and OCI duration
Environmetal concerns
Cost thresholds
Condition of equipment (coolant, fuel, intake leaks?)
etc
The only way to pronounce the "best" lube with certainty is to do a detailed series of micro-analysis trials. That is very time consuming, and takes thousands of dollars and tens-of-thousands of miles. I doubt you have that kind of investment in mind. You need to read my article on UOA normalcy; it's linked with a sticky at the top of this sub-forum.
Allow me to make an analogy, and then I'll come around full circle back to lubes.
Consider the choice of guns and ammunition. Whether you are passionately for or against, or even moot to them, does not matter, the concept will still apply equally well. Any gun will shoot reasonably well with just about any market-based mass produced ammo. So, you have to really define how/why you are going to use the gun, to make a reasonable judgement about the ammo. If you only want to shoot out to 100 yards and 2 MOA, with a bolt action .308Win, then just about any ammo will do that eaily. But if you want to shoot out to 300 yards, and find the most accurate round you can commercially buy, you'll going to have to go through a LARGE series of trials, tasking all kinds of brands, bullet weights, bullet shapes, etc. You'll also have to chart the environmental conditions like temps and wind. And all that is important because every gun has a preference for the "one" combination for that utmost accuracy. But if you don't need the "best", there are MANY, MANY choices that are well more than good enough. It simply depends upon your quest. You see, until you set a threshold of what you need (notice I didn't say "want" but "need") then you're (pardon the pun) shootin' in the dark!
And to come full circle, the same goes for lubes.
There most assuredly is a "best" lube out there, but it would take a HUGE investment of time and money to find which one it was for your unique situation. However any of the qualified CJ-4 lubes will more than well protect your rig in nearly every situation. So your decision to make is what threshold are you going to set? Do you really need the "best" when there are probably more than a dozen lubes that are well more than good enough?
I will venture a wide-angle swag for your quest here:
If you are after a good "bang for the buck" lube and intend to change oil at OEM OCI suggested limits and there is nothing severe in your surrounding conditions, then any CJ-4 rated lube will do just fine. And that includes not only the brand names, but also there are some fine house-brand lubes as well.
So to answer your question, the answer is ...
all of them, none of them, some of them.