Quote:
Originally Posted by mechanicalmoron
On frequent oil changes:
It's partly just paranoia, of course.
Many of us got started with cars with pretty shitty cars. We've experienced firsthand how there's a lot more to an oil than just how it theoretically behaves when it fails, they've all got that figured out pretty fine. It's really the things that oil's formed as engines malfunction, and wear, and have not been maintained, and have been abused, and originally hand design flaws and planned failures and jobs that they'd need and intentional obsolescence and all that jazz. Oil that's well under it's change interval often has lots of water, chunky stuff from outside the engine, chunky stuff from inside the engine, wear metal crud, fuel contamination, and that's not even counting how the engine was dirty from two hundred thousand miles and thirty years of neglect before you even bought it.
All that leads to diesel oils with very aggressive detergents and slightly boosted weights and stupid cheap prices performing pretty fuckin' amazing in real world use on multi-owner vehicles.
Also, if it's still in the car, you can't know how well the oil's doing, or how well your engine in general is doing. You can take a sample, but when it's 15 dollars to drop and fill, why not just do that and know you've got any bad stuff and given it the best go at life you can, and still check out what you took out?
T6 isn't the world's best oil, but from my somewhat lay and paranoid point of view on oil, it seems to be a great cheap (somewhat) synthetic on the thin side of 40 weight that you can put in just about anything. If you magicked a fresh fill of rotella 5w-40 into any random car you see on the street, you can be pretty sure that car would do better and live longer for it.
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Sure, it works okay. The detergent package isn't actually that aggressive, and it's more focused on keeping particulates suspended than actually cleaning (because diesel spec), but sure. It's also pretty shit at not foaming, which is important for an engine running to 7500+ rpm.
The issues with neglect and "crud" should be solved in one oil and filter change, so not sure why that's a factor to consider. I've changed every car I've ever owned over to synthetic and they are all better for it for sure.
T-6 is a perfectly serviceable oil that is an improvement over the dino junk a lot of people put in their cars, but it's far from the best option.