LSJr video about vis, wear, viscosity, etc

[ZeeOSix]

Ford increased the recommended viscosity a grade on all Coyotes that called for 5W-20 in 2021 not to cure any kind of metallurgy issue ... they even give up CAFE credits to do so. Not a move they decided to do because they read BITOG, lol.

 

[FluidNerd]

I watch LSR vidoes like my daughter watches "Love Island". Something to do, while your munching on some popcorn.
The same can be said about this website.

Folks get all super caught up in the semantics of oil chemistry..... like if you get even a tiny bit of it wrong...... your engine is doomed.

Look at the 100's of millions of cars on the road.... every day. 99% of them have owners that are clueless about oil and filter selection. Yet, here they all are, racking up mile after mile on some of the cheapest oil and filters available. Most of them are probably at least 1 qt low too.

Yet the Speed Diagnositix folks are worried to death that their total wear metal count is 11 ppm and they want it under 10.

The roads would be littered with cars with blown up engines, if any of it made a bit of difference. But it doesnt.

It's like arguing which beer is better. It all gets you drunk.

View attachment 347689

That sounds more like BITOG actives. Worried about their engines but have no idea about engines or oils.

 

[FluidNerd]

I've always read that the specified grade was only applicable for a 70F day at sea level, no towing, easy cruising on flat/level ground with the A/C off, two 150 pound passengers with 200 pounds of luggage/gear, stock size tire, within warranty period, on the way to church. Outside of any of those parameters on the specified grade would be uncharted territory.

Anything beyond this, it's up to me to figure out how many grades to go up. I'm glad 20w-50 and 10w-60 exist.

Manufacturers specified oil viscosity is for worst possible conditions that vehicle can ever get to. They know what they are doing. Except GM.

 

[FluidNerd]

Why do you think Ford changed the viscosity from 5W-20 to 5W-30 on the V8 Coyote, and gave up CAFE credits.

Because of fuel dilution from grocery getting, like BMW did.

 

[ZeeOSix]

Because of fuel dilution from grocery getting, like BMW did.

Maybe some of that, but Coyotes aren't that big of fuel diluters, so more for reasons of engine wear and reliability due to low viscosity for the application. And a lot of people don't always baby those engines. When the Coyote was first developed in 2011, the test engineers said the engine should be running 5W-30 but the CAFE pressure made them choose 5W-20 for USA cars. Ford speced 5W-30 in some other countries without CAFE. Of course the Track Pack and the other higher performance versions of that base engine got 5W-50, and those obviously don't suffer from any low oil viscosity issues.

 

[FluidNerd]

Yet, two experts in this thread have said increases in viscosity/hths only decrease wear.

Maybe those experts should watch tests done in Lake Speed Jr. videos.
I have seen turbos blow up when too thick oils are used, and oil consumption go up when higher HTHS is used.
Most people could use thinner than recommended because they never get their engines up to operating temperature and the most wear happens at cold starts.

 

[ZeeOSix]

Maybe those experts should watch tests done in Lake Speed Jr. videos.

LSJr has made many videos where he basically says higher viscosity can reduce wear and provide more MOFT headroom - uses the Stribeck curve often to make that point. He even eluded to it in this video - he said the oils that stay in grade better resulted in less wear, which means their higher retained viscosity reduced wear compared to the oils that lost viscosity from use. He's a Triologist and understands that simple aspect.

 

[wemay]

I just watched it fully through and thought it was very good. Touched on a lot of things that are often discussed here.

Interesting comment about the moly/wear correlation.

Most engines can run on multiple viscosity oils with no noticeable wear differences. This is also suggested by many owner's manuals that show multiple grades can be used.

Viscosity is obviously super important, but so are other things.

My take, exactly.

 

[johnmyster]

That sounds more like BITOG actives. Worried about their engines but have no idea about engines or oils.

Be relieved, I slept fine last night. The engines in my driveway are still not known for wear related longevity issues and hammering absolutes out of generalizations over a few tenths of viscosity or hths is still pointless.

I haven’t looked but I’ll bet $5 none of my vehicles have a “for track use” consideration in the OM.

 

[dnewton3]

Time to take a break.
Way too much bickering with no substantive data to back up the claims.