I've been using M1 HM 5/30 in our daughter's Yaris for 3 years with no ill effects. The 1st couple of OCs were rather dark. I suppose that's a testament to it's cleaning ability. We bought it used and I did know exactly what oils had been used in it's 1st 8 years.
It's now 11 years old with 150k on it. Zero oil leaks, zero burning....not even a slight puff of smoke at startup when it's sat for a few days. I've never added any make up oil either. How much of that is the oil and how much of it is a testament to the durability of the 1NZ engine....I guess I can't say.
Sounds like a good rule for my Prius too.HM oils seem to work just fine for me, but seem utterly unnecessary. In some cases, the HM oil's main point is higher viscosity. All the additives in the world don't replace sufficient viscosity when it's needed. As could be the case with a slightly worn engine. With your OCI's, I'd suspect your engine has exceptionally low wear.
In your case, the standard 5W-30 M1 should be just fine throughout the engine's entire lifespan. If you feel you need more viscosity, step up to regular M1, 10W-30. Or even a 5W-40 M1, like Delvac 1.
Good points. HM oil in my Prius C engine would probably cause a drop in my MPGs.Your sacrificing engine efficiency benefits for extra wear protection and seal swelling you don’t actually need. It’s like adding a layer of carnauba wax on top of a ceramic coating. You feel good about it because you did something different and added more to your already exceptional layer of protection, but in reality you just wasted time.
I don't know much about it's 1st 8 years and 125k miles. CarFax showed a few OCs from the dealer early on. So I'm guess some bulk 5/30 conventional.....probably Valvoline, as that seems to be the bulk of choice around here.What types of oil had been used in the Yaris before you got it?
It has the same engine as my car, the 1.5L.
My car has a clean CARFAX and was in a Toyota shop for regular maintenance up to 108k miles.
Toyota FS oil was most likely what it was fed at the dealer.
HM=marketing! No gain or loss.
~11+ cst from Castrol datasheets when other's are 10-10.8cst. Some of Castrol 30 grades hit 12 cst. So, if the price is the same, skip the HM for a euro 0w30 or 5w30 and get that 11.5-12.5cst oil.
I'd skip the overhyped M1 filter and use a synth media filter, oversized if there is diameter or length room.
When an oil holds an API spec, its extra this and that means little as there are limitations.
....Use whatever brand of oil you want.
Umm. The 0w40 Euro car oil is the same price as vanilla Mobil1.Oh I intend too. But it's obvious that you don't care for M1 products (which is your prerogative).
I buy all of my oil at Meijer. They stock several brands, but M1 and Valvoline they carry the most variety of and often have them on sale....as well as M1 and Fram Ultra filters. So those are the brands I typically use.
It's just oil. I'm not going to over think it. As for HM being just "marketing"....I think there's enough info around here to counter that to some extent....at least with some brands.
And why would I want to pay a premium for a 0/40 Euro oil, when M1 HM is the same price as vanilla M1 and comes in at nearly a light 40?