Yes they do. As in helping to ensure an adequate film thickness. But you have to add mechanical devices and complexity to do that with low HT/HS oils.Cooler temps to allow for the low viscosity and low oil capacity.
Yes they do. As in helping to ensure an adequate film thickness. But you have to add mechanical devices and complexity to do that with low HT/HS oils.Cooler temps to allow for the low viscosity and low oil capacity.
Most Korean engines have very high oil temperatures, 270F is not uncommon in the summer.Yeah from what I read the oil temps on the Nissan 3.0tt are kept around 160-180F. Which I guess makes sense to prevent the 0w20 from shearing too quickly.
For thicker oil. Everyone knows that modern engines are designed with much tighter tolerances and thats partly why they need thinner oil. Reduced emissions and improved fuel economy and other reasons for it but the notion that thicker oil is always better is the old way of thinking.The tolerances are too tight for what?
Really?For thicker oil. Everyone knows that modern engines are designed with much tighter tolerances and thats partly why they need thinner oil. Reduced emissions and improved fuel economy and other reasons for it but the notion that thicker oil is always better is the old way of thinking.
How do you explain engines used in other countries without CAFE type mandates specifying a whole range of oil viscosity? Or motorcycles (no CAFE) that also specify a whole range of viscosity? If you look at the journal bearing and piston to cylinder wall clearances on a new car/truck/motorcycle to ones built 35 years ago the clearances are not really tighter now.For thicker oil. Everyone knows that modern engines are designed with much tighter tolerances and thats partly why they need thinner oil. Reduced emissions and improved fuel economy and other reasons for it but the notion that thicker oil is always better is the old way of thinking.
Yeah from what I read the oil temps on the Nissan 3.0tt are kept around 160-180F. Which I guess makes sense to prevent the 0w20 from shearing too quickly.
For thicker oil. Everyone knows that modern engines are designed with much tighter tolerances and thats partly why they need thinner oil. Reduced emissions and improved fuel economy and other reasons for it but the notion that thicker oil is always better is the old way of thinking.
....
The mantra that "engines with tighter clearances need thinner oil" for proper lubrication is a misconception that somehow got traction through people trying to justify using CAFE driven low viscosity oil.
It's impressive. And I believe there's an updated version too.
I believe it's made by Shell / SK to Mobis specifications.Indeed, Kia's/Total's "Turbo Oil" is a bit intriguing, I wonder what the dealership gets for a quart...
My Genesis Coupe 2L turbo came from the factory with 5w20. They quickly changed that to 5w30 minimum with a TSB. I usually ran 0w40. Been on 5w30 for the last two changes. Going back to 0w40 though due to fuel dilution. I do go 5k mile OCI.Daughters 2020 KIA Soul 1.6T calls for 5w30 on the cap.
Everyone knows?For thicker oil. Everyone knows that modern engines are designed with much tighter tolerances and thats partly why they need thinner oil. Reduced emissions and improved fuel economy and other reasons for it but the notion that thicker oil is always better is the old way of thinking.
Tolerances or clearances?For thicker oil. Everyone knows that modern engines are designed with much tighter tolerances and thats partly why they need thinner oil. Reduced emissions and improved fuel economy and other reasons for it but the notion that thicker oil is always better is the old way of thinking.
I just love the way you do this. Then they have nothing to withstand your knowledge and understanding. You've taught me a good bit on these forums. Thank you.Really?
”Much tighter tolerances”?
Tighter than what engines, what vintage, exactly?
If this were true, that tighter tolerances are a characteristic of “modern” engines, then how could Toyota, or any other manufacturer “back-specify” a thinner viscosity on older engines?
They aren’t modern, and therefore must have looser tolerances, right?
So, they clearly can’t handle a lower viscosity, because of the lack of those ”much tighter tolerances” in older engines.
And yet, whose older, looser engines are getting updated, lower viscosity, oil specifications.
Which couldn’t work, unless…those old engines had the same tolerances…