All You Guys That Think OEM Recommended 16 or 20 Weight...

[kschachn]

There’s some element of truth here - Honda was very adamant 0W-20 is to be exclusively used on the 1st generation Insight and all the Civic Hybrids. The oil clearances were tight.

The reason they are adamant is due to the terms of their CAFE award letter. Its not because of the mechanical construction of the engine.

As has already been noted, if thicker oil destroyed the engine then all engines would be destroyed since even at tropical starting conditions the oil is very thick compared to the operating temperature.

 

[dnewton3]

Watch out!, this post will get closed. Some things cant be debated on BITOG. thin vs thick is one of them i guess. (Search they say) or (beating a dead horse on thin vs thick)
Borrowed time this thread is on. Might just wanna close it down now....

I just asked a question on this yesterday, and by mid afternoon - closed. I should of searched first.... My bad.

et al ...
People are free to discuss vicoscity freely, but the problems come when opinions are confused for facts, civil debate devolves into boundless arguments, and emotions end in hurt feelings. And some wonder why threads get locked?

 

[demarpaint]

et al ...
People are free to discuss vicoscity freely, but the problems come when opinions are confused for facts, civil debate devolves into boundless arguments, and emotions end in hurt feelings. And some wonder why threads get locked?

And some threads are started just to stir the pot.

 

[tolian21]

Thick is better.

 

[OVERKILL]

Do you know that for a fact. That EVERY SINGLE PART in both engines are identical.

Yes, the "Track pack" package on the Mustang GT was just an oil cooler and a programming change that altered the thermal castration mechanism. The car and engine were otherwise identical. The "regular" GT spec'd 5w-20, the track pack, 5w-50.

 

[tolian21]

Yes, the "Track pack" package on the Mustang GT was just an oil cooler and a programming change that altered the thermal castration mechanism. The car and engine were otherwise identical. The "regular" GT spec'd 5w-20, the track pack, 5w-50.

I think nissan GTR also has much thicker oil requirement for a track. I bet you can run that thicker oil for regular street use to gain better protection with a slightly worse MPG.

 

[OVERKILL]

I think nissan GTR also has much thicker oil requirement for a track. I bet you can run that thicker oil for regular street use to gain better protection with a slightly worse MPG.

Yup, GM historically called for 5w-30 in the Corvette and Camaro for DD use but if you were tracking it, they recommended 15w-50.

 

[Hermann]

If 0w-20 or 5w-20 was that bad for your car, it would blow up in the first 10,000 miles. The road sides would be littered with one year old cars by the millions and society will collapse. Geez the drama.

 

[mightymousetech]

Must be why BMW specced 10W-60 for some cars. Those darn Germans are known for loose clearances and shoddy machining after all.

They only spec'd it for one car, and that was to try and mitigate a design flaw.

 

[tolian21]

If 0w-20 or 5w-30 was that bad for your car, it would blow up in the first 10,000 miles. The road sides would be littered with one year old cars by the millions and society will collapse. Geez the drama.

Not 10k miles, maybe 200-300k miles? Who keeps cars that long anyway, and the second owner should he have any issues will blame the first owner for poor maintance. Classical.

 

[RooflessVW]

They only spec'd it for one car, and that was to try and mitigate a design flaw.

4 engines actually.

 

[BMW Dom]

4 engines actually.

BMW also specs ll-01 FE and ll-01 in the same engine. Interesting ....

 

[tyman]

Thick is better.

That's.......what...she said?

 

[demarpaint]

They only spec'd it for one car, and that was to try and mitigate a design flaw.

Interesting how they spec'd a thicker oil to try to mitigate a design flaw. It makes me wonder why not a thinner oil?

 

[RooflessVW]

BMW also specs ll-01 FE and ll-01 in the same engine. Interesting ....

In which?

Surely not the S54, S62, S65, or S85?

 

[Zee09]

Semi thin is too thick

 

[BMW Dom]

In which?

Surely not the S54, S62, S65, or S85?

I wasn't talking about the S series engines. I mean that the ll-01 FE and ll-01 can go in the same engine.

 

[Jetronic]

Boy, wait until they see winter then! I'm amazed every single Ford and Chev doesn't seize solid when we see -30C then.

Temperature has a far, FAR greater impact on viscosity than what you see as the grade on the bottle. Engines simply are not that sensitive to viscosity; they can't be, otherwise, when it gets cold, they'd all blow-up. Since they don't, and since Canada doesn't have dozers out pushing all the failed engines off the road in Alberta when it's -40C, it's pretty safe to conclude that this is a REALLY bad take.

Just to add emphasis, temperature increases viscosity a couple thousand times over what it would be at 212F. Going from a 0w20 to a 0w30 doesn't even double the viscosity.

Bearings spin when there's not enough separation...

 

[RooflessVW]

I wasn't talking about the S series engines. I mean that the ll-01 FE and ll-01 can go in the same engine.

You replying to my comment which was a reply to 10W-60 is what confused me.

I could totally see LL01FE being used in place of LL01. Plenty of people have been using regular 5W-30 (accidentally or on purpose) for forever and the engine's are generally fine as long as intervals are kept reasonable.

 

[ARCOgraphite]

A nugget of truth is the rod and crank spillage have to lube and cool the cylinder bores.
So there is a bit of truth to volume flow. Not a bearing lube issue.
And don't give me that "positive displacement oil pump" balogna.
If the oil pump has an exit ramp berfore the mains drill- that's where the "extra" oil is flowing.