We finally got some... 0W-8.

[kschachn]

I’d post another example of an EPA letter detailing the restrictions and requirements placed on the automaker in regards to recommendations, but clearly that would be a pointless exercise.

 

[Shel_B]

It’s just about engine oil. I myself was thinking to use a thicker grade oil to reduce start up rattle on one car that specs thinner. You and 06 are pretty fair. Actually discuss without judging so much. A little bit. In Australia is pretty good data. But the USA is a lot colder. If they reduced the clearances like the article I posted states, maybe it is still fine to use thicker in Australia using the same engine because it’s warmer. They still say 0 16 preferred in Australia, with no CAFE. What’s the explanation for that? Maybe Australia words their version of CAFE differently, if they have one. The underlying point is did Toyota reduce the bearing clearances to use 0 8 or 16. If they did then using these should be fine, referencing my article above. Not just fine, but preferred in their words.

No warmer than Death Valley, California ... High temp 134-deg F

 

[Fair enough]

No warmer than Death Valley, California ... High temp 134-deg F

That’s true. But I don’t know if Australia gets as cold as the USA.

 

[Glenda W.]

Link the regulations to read first hand. You claim oil cap and push the oil. Preferred is push the oil . They say can use thicker in harsh, so there you go they are not regulated by cafe. But lets see the source first hand. How long is this going to take I have better things to do like walk the dog for an hour. Maybe by Monday, I have a lot to do.
You probably should learn more about journal bearings before you write, how’s that. Is that the topic? Think about it. No it isn’t.

Link to regulations. You’ll probably want to skip the dog walk…..

https://www.govinfo.gov/content/pkg/FR-2022-05-02/pdf/2022-07200.pdf

 

[ZeeOSix]

Link the regulations to read first hand. You claim oil cap and push the oil. Preferred is push the oil . They say can use thicker in harsh, so there you go they are not regulated by cafe. But lets see the source first hand. How long is this going to take I have better things to do like walk the dog for an hour. Maybe by Monday, I have a lot to do.
You probably should learn more about journal bearings before you write, how’s that. Is that the topic? Think about it. No it isn’t.

Every post you make here seems to be more delusional and pushes the troll meter farther to 100%. You need to learn a lot more about journal bearings to participate in any technical discussion on how they actually operate - you obviously have many misconceptions about them. Stop trolling and go do your own research and learn something since you don't seem to believe anything anyone says here.

This has been posted many times over the years, and even mentioned in this thread. These are some of the highlights from the EPA's response to Honda and Ford when they wanted to start using thinner oils. These kind of EPA requirements are still in effect today - maybe even more stringent now. I'm not going to spoon feed you anymore on this stuff ... get on the 'net, do some searching and learn on your own since you don't seem to believe anyone on this board.

 

[ZeeOSix]

Some of the very old antique boats I had the pleasure of being around were gravity lubricated. There was a big glass bowl above the engine with copper lines running everywhere to lubricate things, including the bearings. All of the leakage ended up in a giant brass drip pan below the engine that you had to periodically empty.

I happened to come across this from a very old SAE paper, and sounds like what you were describing.

 

[Chumango]

Link to regulations. You’ll probably want to skip the dog walk…..

https://www.govinfo.gov/content/pkg/FR-2022-05-02/pdf/2022-07200.pdf

Any help with finding the relevant section of this 383 page document?

 

[Glenda W.]

Link the regulations to read first hand. You claim oil cap and push the oil. Preferred is push the oil . They say can use thicker in harsh, so there you go they are not regulated by cafe. But lets see the source first hand. How long is this going to take I have better things to do like walk the dog for an hour. Maybe by Monday, I have a lot to do.
You probably should learn more about journal bearings before you write, how’s that. Is that the topic? Think about it. No it isn’t.

Link to regulations part 2. Better clear your schedule….

https://www.nhtsa.gov/sites/nhtsa.gov/files/2024-06/CAFE-2027-2031-HDPUV-2030-2035_Final-Rule_web_0.pdf

 

[OVERKILL]

I happened to come across this from a very old SAE paper, and sounds like what you were describing.

View attachment 251293

Sounds similar! This was a van Blerck (that was later "upgraded" to the high speed model that featured a primitive oil pump).

Here's the "high speed" version. You can see the oil tank at the front and the copper lines running to the poppets and cylinders.

Here's one with the gravity oil tank and lines:

Here's a couple of singles with the little glass oil cups:

This one has 4!

I'll see if I can find some more

 

[Fair enough]

Same thinking here led to my previous comments.
Some of the makes advertised 25 millionths plain bearing runout versus 50 millionths for class 7 ball bearings. Runout is not clearance I know that. On these most of them the clearance is finely adjustable. They do not burn out with light spindle oil.

Hardinge Cataract Screwcutting Toolroom Lathe

Cataract Lathes - high-precision American-made for toolroom and experimental shop work

www.lathes.co.uk

The history of engines oiling evolution probably is interesting to the group here. Later on someone said the pressurized oil is dirty lets clean it with some rags. Now people argue for endless decades about which oil filter is best for them and everyone else.

I read some points about the requirements of oil in the manual, but not going to dig through the government document without a search tool. I see preferred doesn’t exempt from not putting an oil chart. But they
My side finger hit the post button. I did walk the dog last night for over an hour and had to use a flashlight due to this. This morning at 8 he got another 45 min walk. Now I have to feed him. He gets a lot of good things to eat. So I still have better things to do. A dog is more important than trying to mind read Toyota and speculate why they say 0w 8.

 

[OVERKILL]

@ZeeOSix some more:

 

[ZeeOSix]

Same thinking here led to my previous comments.
Some of the makes advertised 25 millionths plain bearing runout versus 50 millionths for class 7 ball bearings. Runout is not clearance I know that. On these most of them the clearance is finely adjustable. They do not burn out with light spindle oil.

Hardinge Cataract Screwcutting Toolroom Lathe

Cataract Lathes - high-precision American-made for toolroom and experimental shop work

www.lathes.co.uk

Why bring run-out into the discussion when we're talking about journal bearing clearance. Some quick searching shows that plain journal bearings used in lathe spindle bearings were only used to around the mid 1940, then they started using roller bearings of various designs. Also some searching shows that the plain journal bearings used in old lathe spindles were adjusted to run a clearance of around any other normal plain journal bearing of around 0.001 inch of clearance per 1 inch of journal diameter. Some journal bearings in modern day ICE could run tighter than those old lathe bearings. Journal bearings in old lathes were relatively low speed and probably not really lubricated that well, not like they are in an ICE oiling system. They couldn't run super tight like you think anyway (same with any other plain journal bearing) without any kind of active cooling or lots of forced oil flow. They also wore out relatively quick if the clearance was too tight and not lubricated very well. Running a journal bearing too tight, even with good lubrication can cause them to over heat, cause more wear and shorten their life. Those old lathe journal bearings typically used oil that was around ISO 32 (150 SSU at 100 degrees F). That basically equates to a heavy 10 grade to light 20 grade oil (not what I'd call anything as thin as 0W-8 grade at 100C). So seems these old lathes using just plain journal bearings are nothing "magical" ... they are just the everyday journal bearing. Obviously they started using roller bearings on lathe spindles around 80 years ago for something better suited in this application.

The history of engines oiling evolution probably is interesting to the group here. Later on someone said the pressurized oil is dirty lets clean it with some rags. Now people argue for endless decades about which oil filter is best for them and everyone else.

Back in the "goodtimes" days ... seems nothing has changed.

I read some points about the requirements of oil in the manual, but not going to dig through the government document without a search tool. I see preferred doesn’t exempt from not putting an oil chart. But they
My side finger hit the post button. I did walk the dog last night for over an hour and had to use a flashlight due to this. This morning at 8 he got another 45 min walk. Now I have to feed him. He gets a lot of good things to eat. So I still have better things to do. A dog is more important than trying to mind read Toyota and speculate why they say 0w 8.

I agree, you should probably just focus on walking and feeding the dog ...

 

[M56959]

Enough.