0W-20 Engine oil Brand Suggestions

Yeah, on closer exam, they are close to identical. I was trying to avoid posting the table to avoid confusing the crowd. I rounded five places to four.

 

1966 data is irrelevant. I’d like to see data from toyota engine specs from 2005 for example. My 05 called for 5w-30. I would hardly call the 4.7 a sloppy old small block v8.


I dont think anyone is dogging the 0w portion. I see the predominant question being about the 20w upper end portion

 

Cool

 

Even something as simple as,(example) Toyota using a different bearing manufacture, ( I think Koyo) since the first 5.7L was produced in 2006 until now. If they change something like that, then the machining specs. would change, because the bearing dimensions might not be Exactly the same as the new Bearing manufacture. Just something to think about, on how dimensions and specs. can change ,on the same motor, over 14 years !

 

I used to own a 2005 4.7L tundra so from memory it's 1.6 to 2.3 mils. It was a great truck but a bit doggy. The engine has tighter tolerances (different than clearance) than the 5.7L. My original post was just to try and show that engineering is a game of trade-offs.

 

Tolerances determine the Clearances. Like I said before , Engineering ( designing) a motor, is all based on, what oil is being used for the lubrication. what weight, viscosity at different temp. etc. That's the first and most important consideration. Enough Said, I'm done here. Gotta get back to work and Machine some crankshafts for some 20W-50 oil. L.O.L.

 

Of course. The 1966 data is irrelevant to making a decision about what weight motor oil to run in a UR engine. That wasn't the original topic of this thread anyway.

The sixties data was only given to show how bearing clearances have changed in 50+ years with these "modern new manufacturing tolerances", compared to how oil viscosity recommendations have changed over that time. It sheds some light on just how important these "modern new manufacturing tolerances" are to the oil viscosity recommendations.

Anyway, if you are anxious about what weight oil to run in your UR, my opinion is: You aren't going to find the final, convincing answer here, or on any other forum. If you're scared to death that 0W20 motor oil is going to harm your darlin', make a decision and take the responsibility. Personally, if I was worried, I would put 5W30 in my Tundra in a heartbeat and never look back. A decade ago, 5W30 was the standard oil used in virtually everything. The UR engine has been around longer than that, and as far as I can tell, it hasn't changed; it's a good engine, but it ain't no V12 Testarossa.

 

and it ain't no 630 cubic inch alum. Big Block "BIG BRODIE"with NOS and 1200 H.P at the Crank !!!

 

I hear ya. I run 5w-30 in mine without issue. If 0w-30 was on the shelf locally i would run that, but it’s not so I’ll stick with the 5w-30. It runs great and it never gets to freezing weather here anyways

The 5.7 is a great motor. I’ll bet my 30w oil is easier on it than a blower, which toyota endorses just fine

 

any body know the Specs for that, if not give me a call... "Modern New Manufacturing".. "Tolerances "??? 'Your Killing Me Smalls"

 

You mean TRD "Supercharger" totally different than a blower...

 

Device producing pressurized incoming air. Who cares about the semantics. There’s a handful of kits for this engine i doubt using the wrong word for the type of supercharger is confusing anyone.

 

"Tolerance(s)": A numerical method for engineers to communicate to machinists just how much half-a**ed machining is acceptable on any given part.

"Modern New Manufacturing": Manufacturing methods replacing error-prone humans with CNC machines and robots. Once accurately programmed, said machines reduce half-a**ed machining to practically zero. Human "machinists" are then reduced to machine tenders, feeding the stock and removing the parts.

 

Sorry, I guess I'm just old School "Blower"= Big forced air induction unit, sticking outta the hood , mostly used on naturally aspirated engines. runs off a pulley system, on the motor. Supercharger = basically an upside-down "blower", forced air induction unit, under the hood (replacement for intake manifold, mostly used today, on fuel injection engines. Runs off a pulley system on the motor too.
Turbo = a forced air induction system, that's powered from the exhaust system, using the engine oil, to cool the unit, in turn, adding extra heat load, to your engine oil. Not for me.

 

B.S. - C.N.C machine shit. It all depends on the M achinist setting it up. I'm amazed at how many "C.N.C machinist" Don't even know or can't even sharpen a **** drill correctly!! Go Home !!