Toyota Crown takes 0w8 oil

My second car was a 1980 AMC Sprit with a 2.5 Iron Duke in it. It had a HUGE double thick radiator. It was about 40 inches wide and 124 inches tall and was about 3 inches thick. It held 3, THREE, I am not kidding you, 3 quarts of oil! I read in an old Hot Rod magazine there is a formula out there that lets you compute the increase and decrease of the oil capacity and cooling capacity inversely. Same reason 911's hold 3 or 4 gallons of motor oil!
 
This /\ /\ /\ /\ exactly. Engineering/production of modern internal combustion engines is better than it has have EVER been. Especially Toyotas. But the main focus is on increasing fuel economy, especially in countries where there are large tax incentives to have higher fuel economy like the US.

Once you scratch the surface just a bit and peel back a couple of layers.. it becomes clear that Toyota (and other automakers) are making major changes with these ICE vehicles in an effort to increase efficiency and fuel economy. Electric vehicles are becoming more advanced, and more popular... they must adapt in certain markets, or be pushed out.


Toyota added Exhaust Gas Recirculation to its new Dynamic Force engines. Something not found in its previous Toyota gasoline engines. They also redesigned the engine internals to accommodate even thinner oils like 0w-16 and now 0w-8.

Now think about this... Toyota, a company traditionally concerned with simplicity and reliability.... why would they add EGR which only causes more complication, and often issues... because of that slight bump in fuel economy!

Same with the variable oil pump... because of that slight bump in fuel economy!


Same with the thin oil... because of that slight bump in fuel economy!


Same with the plastic and glue to save weight... because of that slight bump in fuel economy!


Toyota is running the thinnest oil it can, while still having acceptable engine wear. I am extremely happy to see the new 2022 and 2023 Toyota's still have the broad range of oil viscosity recommendations outside of the USA. So it seems that Toyota does still indeed care about reliability, just not as much as they are about money and tax breaks in certain markets.


And to all the people saying there are multiple parts each for different regions of the world.. that would not be cost effective. Companies avoid this at all costs whether its software or hardware... both cost a lot of money to develop. Not saying it does not happen in certain instances.. but with an oil pump? I am not buying that. Now with a gauge cluster that shows kilometers instead of miles.. sure!

I don't think Toyota is quite as good as you think it does.
 
Here's the picture from the German manual
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You only included the part that is relevant to your position. But not the full excerpt from the manual.

Cliff notes. Use 0w-16. If 0w-16 is not available, 0w-20 can be used, until the next oil change and 0w-16 must be used.
I know my Land Cruiser says 0w20, of course, I run 5w30. When I was stationed in Bahrain they would run 20w50 in the same Land Cruiser, their manuals say use 0w20 - 10w30 and after that it still says you can run a high velocity oil. Those land cruisers over there have a lot of mileage running on 20w50
 
Wow, this thread has been a spastic reaction to change. My impression when I joined BITOG years ago was that it was science based, and evidence based.
I am starting to see more dogma than evidence in some conversations.

Perhaps much thinner oils with emerging technology could have great benefits. Perhaps there s a fascinating aspect of the polymer layer being formed with boron additives that is worth pondering? Perhaps science with incentive to increase efficiency, has found a way to maintain MOFT that is not based purely on base oils physical properties?

As someone who has always been eager to acquire more knowledge about engine oil technology and powertrain design, I think this is exciting.

I’m looking forward to see where this goes and learning more. This is awesome, like moving on from carberators!
 
It'll be interesting to see if whether or not another automaker specifies 0w8 like Toyota any time soon. If I had to guess I'd say Honda will be next.
 
Wow, this thread has been a spastic reaction to change. My impression when I joined BITOG years ago was that it was science based, and evidence based.
I am starting to see more dogma than evidence in some conversations.
Gonna have to wait and see how these cars fare with 250K+ miles on the engine - that's the real "evidence". These engines are specifically designed to run 0W-8, but they may not be real heathy with really high miles on them. Others aren't speced for oil that thin, and most likely would suffer more wear as a result.
 
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.
Bro, this was amazing. Worth resurrection after a year and a half.
 
The oil weight selection pages from the Middle East Crown Owner's manual, downloaded from here: https://www.toyota.ae/en/owners/owners-manual/

An oil with a higher viscosity (one with a higher value) may be better suited if the vehicle is operated at high speeds, or under extreme load conditions.

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Fuel efficiency overlords trying to eke out 0.1% additional efficiency over 0w-16. It is true stupidity. Run 0w-20 and be happy!
 
^^^ That statement has been used for years in all the Toyota OMs, even in US OMs where Toyota only recommends one low viscosity. Apparently Toyota still has a few Tribologists in the OM writing department, lol.
 
The US manual is written in a manner to try to convince the government regulators that Toyota is trying its absolute best to convince the public to use the most efficient oil possible. It really does a disservice to Toyota owners not to have a manual which looks like overseas manuals showing the range of appropriate oil weights for the ambient seasonal temperatures.

Apparently, only the weight used to obtain the official fuel efficiency estimate can be officially recommended in our backwards country.
 
The US manual is written in a manner to try to convince the government regulators that Toyota is trying its absolute best to convince the public to use the most efficient oil possible. It really does a disservice to Toyota owners not to have a manual which looks like overseas manuals showing the range of appropriate oil weights for the ambient seasonal temperatures.

Apparently, only the weight used to obtain the official fuel efficiency estimate can be officially recommended in our backwards country.
Actually, the manual is being written exactly the way they are required to write it based upon their EPA award letter.
 
Apparently y'all haven't been following Toyota quality lately. Most of what they've built the last 3 years has been junk. And their last two pickup truck launches have been disasters also. Recalled hundreds of thousands of Tundras to replace engines, new Tacomas with more issues than I care to list here, etc. Personally I never understood the hype after watching 1980s Toyotas literally rust apart, 1990s Tacomas with frames that folded like lawn chairs, 2000s V6 engines that blew head gaskets and V8 engines that ate very expensive emissions parts, etc. etc. Completely over-rated. But as it relates to this specific thread why would you trust a company with a poor track record when they say "0W8 is great!"?
 
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