A better example is a differential. All the friction and oil shearing is purely mechanical. Go drive high speed and/or tow for a long time and see how hot a differential can get.
Viscosity Grade recommendation for Death Valley
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Pressure? Honest to goodness, whatever next.
You keep trying though, I’ll give you that.
No, no it’s the “pressure”.
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Do you not realize pressure creates heat?
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yeah, the pressure on the gears under load, I would assume it relates the heat is related to friction...
Pressure does not create heat. Pressure does nothing in that regard.
You’re out of your element here.
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I’m going to ask you one question that’s gonna tell me everything I need to know, does it take torque to make horsepower, or horsepower to make torque.
Go away. Stop trying to look as though you understand things you do not.
I don’t play games on this board. I try to keep it technical and accurate.
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Yes it does. What do you think wears fluid out in a transmission and rear end. Pressure creates heat. I have been through thousands of hours in quite a few manufacturers certifications. I know what I have learned and I know what I know. If you were to just take a rear diff no load and turn just brake rotors no wheels and tires, don’t think that fluid gets hot?
Now you’re at least acknowledging that the viscous shear in the oil causes heat.
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I go along with that. If not a spark plug, what fires a Diesel engine?
Compression heat raises the temperature of the gas in the cylinder. Pressure does not. You can have pressurized gas bottles laying around all day and they are not hot. Compression is work, pressure is not.
It’s a very important distinction in the context of this discussion.
I fully agree, interesting information in this thread that went in a direction most threads here don’t. I only said your mind was made up from the start because your replies to suggestions and ideas indicate you already know what you want to do.You are absolutely correct in the sense that I have NOT read anything in this thread to change my mind and only confirmation that what I have been doing, is the right thing.
However, I learned misc other stuff so it is a good thread.
My only mistake was to say "what do you recommend?" in my op.
I meant to only say what do you use? Just to collect information and maybe revise my ways. And not necessarily that I am desperate, please help me. So it was just a data gathering and chatting thread for me.
My initial post (#1) was that I use 40 and stout 30 viscosity grade under some given condition ...
Now what are the conditions?
Long and high speed trip (speed limit is 80 mph in some parts) with a very loaded car and stuff on the roof rack and very high ambient temperatures! I explained that in post #163.
Also mentioned that I like and have used 30 grade other times (post #195) and that M1 EP 10W-30 is one of my favorites and may also try Castrol Edge (German?) 0W-30.
What do the experts say?
From @MolaKule (post #211)
"I would go up a grade from the suggested owner manual's for the temperature to be expected and have my cooling system flushed and new coolant added."
What does my OM recommend? 5W/20
What's a grade up? 30
What have I been using? 40 or 30
So we are cool!
Do I listen to experts with real PhD? Yes!
Do I listen to "internet experts"?
Most likely NOT. Unless I have a good read on them!
Do I listen to @ZeeOSix aka MOFT Chairman? Yes.
Either I have a good read on him or I think he has a master's or PhD or all of the above!
What else do I like?
In general, stout oils with narrow spread, less vm, and lower Noack if I can help! Sometimes I ignore that (narrow spread) when there is good sale on Euro 0W-40 oils having solid approvals! Also considering that they have a naturally higher vi so it (spread) doesn't bother me as much!
Now all these other distractions and taking things out of context is just the internet thing and I understand ... As an example, in this thread, the rise in the oil temperature (or lack thereof) due to its chemistry (baseoil, viscosity, spread, shearing, etc.) was NOT my main concern even though some may have assumed so. I was more concerned with having adequate MOFT due to high rmp, high load and high ambient temperature. And I mentioned that in couple of other threads by saying "Long live MOFT".
It's all about MOFT baby.
btw, were you part of the "informed community"?
If so, I may have missed your contributions. I need to go back and re-read the entire thread if I have time.
So once again, I got the info and the confirmation from the sources that matter and also learned a few tricks and other stuff including cooling system tweaks, etc. Something I knew but never applied since I'm not racing down to Vegas. However, it was a good reminder. So I'm happy with my 50/50 but flushing it with new coolant as suggested is a good idea as well.
Long short story:
I brought bunch of bees to the classroom (youthful indiscretion or stupid idea) and was sent to the principle office.
Him and bunch of teachers were talking and sometimes had a heated debate while I was waiting for my mom to get there ... and I learned tons of "inside information"!
Next day, my teacher said, you didn't learn anything, did you?
I smiled and wanted to say, obviously I missed the class subject (which I didn't care anyway) but learned much more valuable stuff, but didn't do it.
You can learn stuff in any environment. What to do with it, is another question!
The valley is at or near sea level, but to get into the valley from either east or west involves going over a pass at around 5,000 ft. That's why car manufacturers test vehicles there. It's very hot and has very big uphills.
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For the correct answer, watch the Gail Banks diff cover videos.
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simple answer is the rapid compression of air in the cylinder causes the air molecules to slide against each other ( friction) creating enough heat for combustion.
Does that cause heat in an air compressor?
Could you describe a Diesel engine as an air compressor with a fuel supply?
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definitely... and if you spray a combustible into an air compressor it could act like a diesel engine..
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It takes horsepower to make torque. Compression ignites diesel. That’s where that pressure come in ya see what I’m getting at here.
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