Toyota Crown takes 0w8 oil

But, where is there an unrestricted speed on a road of in the US highway system?

2) Do you expect Crown owners to be towing heavy loads? Probably not. They would have a real truck instead for towing duties.
It’s amusing how the discussion has moved from essentially “the engine is designed for the oil and might be damaged by a higher grade” to “the (electric) oil pump might starve the engine with a higher grade” to “the US doesn’t drive at high speed” as the moving target of silly justifications.

It helps when you understand that there is no technical reason. It gets you off this merry-go-round.
What are high speeds? That is in the eye of beholder.
The way lately Toyota does things, they will be buying more BMW engines and whole vehicles.
 
They do NOT use an electrically powered oil pump. These new Toyotas will outlast whatever POS your are currently driving.
I love how this assertion is both cocky as hell and absolutely devoid of any evidence to support it. It isn't even predicated on him driving something specifically known to not last, so he could be driving a Crown Vic and it doesn't even matter because of the total investment in the perceived omnipotence of the Toyota brand. Delicious!
 
It’s amusing how the discussion has moved from essentially “the engine is designed for the oil and might be damaged by a higher grade” to “the (electric) oil pump might starve the engine with a higher grade” to “the US doesn’t drive at high speed” as the moving target of silly justifications.

It helps when you understand that there is no technical reason. It gets you off this merry-go-round.
Yes, the target is always moving and strawman arguments made to try and justify that a thicker oil doesn't protect any better than a thinner oil. Or that if thinner oil is not used then the oil pump and engine are going to not work correctly. Even when statements are made in OMs that say a thicker oil is "better suited" (meaning it protects better) than a thinner oil in more extreme use conditions, or other countries not CAFE regulated show a whole range of viscosity options for the same exact engine based on the ambient temperature. Those statements wouldn't be in OMs if the thinnest oil called out protected the engine just as good in all possible driving conditions.

Like mentioned, why don't engines and oil pumps blow up in Minnesota, Canada or Alaska in January during cold start-up and warm up when the ambient temperature is -25F and the oil is many 100s of times thicker than when it's at operating temperature. If an engine and oil pump was so sensitive to oil viscosity, every car would be damaged and in the junk yard at very low mileage simply from cold start-ups in the winter months.
 
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If toyota really cared about that statement, then they would further define what it is to the same level of detail like "Special Operating Conditions".
That's what you think they should do, which doesn't mean that their statement that a higher viscosity oil is "better suited" for more extreme use conditions isn't correct. It is a correct statement.

Do you believe higher viscosity oil won't give better engine protection under extreme use conditions? If so, why?
 
My brother’s 2019 camry 4 cylinder A25A-FKS owner’s manual says the oil pump will survive a 15w40 .
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2023 Toyota Camry A25A-FXS, A25B-FXS, from German manual:

"In Ihrem Toyota-Fahrzeug wird “Toyota Genuine Motor Oil” «Original Toyota-Motoröl» verwendet. Toyota empfiehlt den Gebrauch von zugelassenem “Toyota Genuine Motor Oil” «Original Toyota-Motoröl». Wenn es die entsprechenden Qualitätsansprüche erfüllt, kann auch anderes Motoröl verwendet werden. Ölqualität: 0W-16: API-Klasse SN “Resource-Conserving”, SN PLUS “Resource-Conserving” oder SP “Resource-Conserving”; oder ILSAC GF-6B-Mehrbereichsmotoröl 0W-20 und 5W-30: API-Klasse SM “Energy-Conserving”, SN “Resource-Conserving”, SN PLUS “Resource-Conserving” oder SP “Resource-Conserving”; oder ILSAC GF-6A-Mehrbereichsmotoröl."

Google translation (I did not retain too much from High school when I had German as a foreign language):

"Toyota Genuine Motor Oil" is used in your Toyota vehicle. Toyota recommends the use of approved Toyota Genuine Motor Oil. If it meets the relevant quality requirements, other engine oil can also be used. Oil quality: 0W-16: API class SN “Resource-Conserving”, SN PLUS “Resource-Conserving” or SP “Resource-Conserving”; or ILSAC GF-6B Multigrade Motor Oil 0W-20 and 5W-30: API Class SM “Energy-Conserving”, SN “Resource-Conserving”, SN PLUS “Resource-Conserving” or SP “Resource-Conserving”; or ILSAC GF-6A Multigrade Motor Oil."
 
You have the part numbers for both pumps from an official Toyota source (with links) - US engine and not US engine pump part numbers to compare?
Even if hypothetically is ECU calibration, I just don’t want to believe that they would be that DUMB to limit grades, knowing that most of them are going to end up after 20-30k at quick lube places.
If that is the case, they are probably front runner for “what were they thinking “ award.
 
Just thinking out loud here and sure an expert could educate me in the process. When a 0w30oil is blended/created for example, is it 0 "weight" at the beginning with a`thickeners" package added to allow it to achieve 30, or is it a 30w to begin with and a "thinners" additive added to allow it to achieve 0w. Or somewhere in between.
 
Just thinking out loud here and sure an expert could educate me in the process. When a 0w30oil is blended/created for example, is it 0 "weight" at the beginning with a`thickeners" package added to allow it to achieve 30, or is it a 30w to begin with and a "thinners" additive added to allow it to achieve 0w. Or somewhere in between.
Time to do some searching and reading on here, not detail this thread more than it already is.
 
That's what you think they should do, which doesn't mean that their statement that a higher viscosity oil is "better suited" for more extreme use conditions isn't correct. It is a correct statement.

Do you believe higher viscosity oil won't give better engine protection under extreme use conditions? If so, why?
Since with higher viscosity oil comes with higher oil pressure relative to the thin oils, the ECU will be fooled, and limit oil flow thus volume, so that you are overly reliant on the thicker oil film, due to limiting flow, will not control the heat dissipation of the engine also, so now, your extreme use test becomes even more extreme.

I'll take the full flow of thinner oil lubricating and cooling the engine instead.

On a side note, but still applies... over in the European/Imports Oil forum, whenever their is a BMW oil question, all of the BITOG experts say use the appropriate BMW spec oil, since BMW knows best and their oil specification/certification will protect the engine, without question. But..... when there is a particular B58TU2, specifies LL-22FE++, which happens to be 0w-12, all the sudden the people that didn't question BMW engineers and their spec, now say BMW LL-22FE++ 0w-12 specification is inadequate and go with a thicker spec oil. They trusted BMW's engineers until they broke with BITOG experts' "engineering experience designing and testing BMW engines"
 
This site exists for people just to argue. It says it's about car maintenance and fluids, but it's obviously just an outlet so we don't outright punch people in the face in the real world.

Seriously, pick a side and type excrement for others to read. We're crap flinging monkeys with keyboards.
 
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