Keeping the engine cooler

Toyota 0W20 is no slouch, what I get. Bottles look like Mobil now, fwiw. Every day price cheap as dirt.

 

Asked and answered.

Cooler engines can run longer....to a point.
However (comma!) engines up in the frozen North....which generally speaking, is anything above I-40...tend not to last as long and require these weird devices called block heaters.

Cooler running engines may last longer but they're dirtier.
This is why the cooling system had a thermostat, which is designed to keep it operating within a specific temperature range.
Engines have a design operating temperature, which is more or less 90-degrees-C.
As stated above that's somewhere around 195-degrees for those who don't want the metric system shoved up their school systems.

This is why I sometimes advise people not to worry about running designer oil blends in their engines because they live where it's warm.
I promise you.........AGW hasn't gotten that bad.
Even if you're engine is running flat out at 108mph (170+ kph where they habla metric) IN Aridzona.......IN July, then it's going to be the same temperature as it is when it's crawling through snow at 40kph, in Yellowknife, NWT.......in February.................or around 190-degreesF.

If I used a Prius as a Taxi, and it's a good car for that, I'd use Mobile-1......but only because it's widely available and I'd use the OEM oil filters only because Amazon will deliver them to my door for less than $5 a pop if you buy them by the half dozen.

I'd also reduce my OCI to 5,000 and assiduously monitor my oil level every other fill-up.

Good Luck!!

 

If you plan to run the Prius engine for hours at 5000+ rpm in extreme conditions yes! Put the best stuff in it! Otherwise it be fine!

 

Toyota Genuine is made by ExxonMobil.

 

Could be, any documentation on that? just curious.

 

Here you go. (TGMO=Toyota Genuine Motor Oil). This isn't to say that TGMO and Mobil1 oils are the same; ExxonMobil formulates the Toyota oil to whatever Toyota's specifications are, and there's speculation at BITOG that the Toyota oil may actually use more-refined base stocks with a higher viscosity index than Mobil1-branded oil. For instance, TGMO 0W-20 has a slightly lower quoted kinematic viscosity at 100C (8.5 cSt) than Mobil1 0W-20 (8.7 cSt).

 

Thanks for that! That's all I've used on ours, about 11~12 changes so far (every 6 months), no issues. Using it on a couple of (in the family) Honda's too.

 

The word you're looking for is "snarky," not "snivelly."

And, he was being snarky since you're considering spending significantly more money on a product because you believe the dubious claims of the manufacturer--the very entity whose claims should be suspect and met with a healthy dose of skepticism because they have a vested interest in getting you to buy their product.

 

Snivelly: In a whiny or tearful way.
Snarky: Snide and sharply critical.
(Definitions courtesy of the Oxford English Dictionary).

I'm not sure what you mean by "grill and lower diffuser air vent directors," as Toyota lists no such parts. Are you thinking of the duct panels in front of the radiator, behind the bumper cover?