Oilpinion. Mobil1 75,000+ High Mileage oil at 192k?

So your real question is: will 0-20 hurt my engine? Not will my vehicle benefit by 0-20.
I doubt it will hurt your engine.

Thank you.
Being a Registered Tree-hugger and Greenie, I mustrive for optimal fuel mileage.
Not worried about engine damage - I accelerate gently and on emergencies try to not overly stress the engine going up mountain grades.
Just wondering if Mobil1 High Milage is ideal for a two-year-old engine, or use 0W-16 specified.

Toyota has several vehicles with the exact same engine. The ones built 5+ years ago have a oil viscosity recommendation of 0w-20. Exact same engine built 2 years later and the oil recommendation changed to 0w-16. And now it’s 0w-8. In all probability any of those oil viscosities will be fine.

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Which came first. 0W-8 engines or engines which use 0W-8 to gain higher fuel mileage figures?

@Robert-Gift

We all KNOW you’re a troll

We REPEATEDLY tell you to to use the approved fluids, correct procedures, etc.

And you ALWAYS ignore us and do everything incorrectly

You just keep coming back because you’ve got nothing better to do with your life

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It is meant for engines with weeping seals, do you leak any oil? If not, 0w-16 is ideal for your car, and will provide slightly better mpgs.

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Thicker oil (to a point) is better for piston ring seal, and with your 193K miles it might help it some, all the bearings and such will also have some wear and more clearance (we are talking in the 0.001" range, NOT 0.1") and so the thicker oil can help there also, BUT, it could affect the VVT system… So run the thicker oil and IF it throws a CEL or fuel mileage decreases then you can just change back to the OEM oil… Don’t over think this…

The A25A-FXS engine in your Lexus has used 0W-16 engine oil in the US market since it was introduced in 2019.
That engine was later certified using 0W-8 engine oil for the Toyota Crown.

If you lived outside the United States, you would have more oil viscosity choices.

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