Yes, GTL can have high(er) VI from start.
LSJr - Viscosity Breakdown: The Silent Engine Killer Revealed!
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Yes, GTL can have high(er) VI from start.
He’s kind of an M1 0W-40 hater and really trashed the SN formula a lot in many videos with Porsche guys that push Driven. Perhaps rightfully so, but there wasn’t any real evidence. If he has more data like he shared in this video I’d love to see it.
I agree with you he’s really stepped up his YouTube game and appreciate real info and data.
He can trash it all he wants, because it’s baseless. M1 0w40 for a looooong time has been one of the most-certified oils, and meeting the highest manufacturer performance-based requirements. One may not personally like or use the M1, but to “trash” it is to announce one’s ignorance of Mobil’s expertise, oil testing and proven results.
Dave from HPL spoke very highly of the previous M1 0w40 formula with high oxidation(ester). I’m not sure about the new triple action formula. Once Dave runs it through his lab we should know. Maybe Lake knows something we don’t?
Maybe "trash it" is too strong of a description on my part, but I agree with you.
Exactly, There are folks out there that will tell us to "Start with a lower grade viscosity b/c it doesn't sheer as bad" but they must not realize the higher viscosity oil still ends up being a higher grade when the run is over. We hear it on this board, "Run 0w-30 b/c it's more shear stable than 0w-40", as an example but that 0w-40 may very well end up being the the better option for higher viscosity still. A 0w-40 vs 5w-40 would have much less of a difference though & virtually no difference in wear.
edyvw
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Don't forget Noack, too. Also, remember: "as thin as possible, as thick as necessary." There is always a balance.
I would always run Castrol Edge 0W30 over Motul 5W40, Mobil1 0W40 or Castrol 0W40. Only reason I don't is track, and crap load of Motul I have on the shelf. If I did not do track in summer, I would still run Edge 0W30. On track, your argument stands. It is better to have bunch of margin, especially if running longer OCI and tracking car. But street use? Shear stable 0/5W30 would always be my choice over 0W40. But that is where I draw the line as far as how thin I would go.
Good video. Good on HPL/dave.
It’s also interesting to finally see what’s been going on in the industrial world, finally making a jump to automotive.
The compressor and gear oil industry is at times both light years ahead of the automotive side, while also being decades behind.
It’s also interesting to finally see what’s been going on in the industrial world, finally making a jump to automotive.
The compressor and gear oil industry is at times both light years ahead of the automotive side, while also being decades behind.
Patman
Staff member
Probably because there are way more people using M1 0w40 than Castrol 0w40.
I was looking at the Euro version. 3.5 HTHS
edyvw
$50 site donor 2025
Maybe they would do if Castrol 0W40 was available at Wal Mart like before.
What I'm confused about, is why does the No VII Euro 5W20 have an HTHS of ~3.26, while the 10W20 have a lower HTHS of ~2.8?
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Nice way to spend the evening watching this video.
Different base oil. It’s got a lower HTHS but is more viscous in the cold. The 10w20 is perfect for year-round use anywhere south of about Nashville in cars that call for a 20 grade.
Since I’m considering using a 20 grade in an engine that’s always called for a 30 grade, the higher HTHS of the 5w20 is high enough to keep everything happy, where the 2.76 HTHS of the 10w20 likely would not.
Thank you for the explanation. What is the reason behind you using a 20 grade for an engine that calls for a 30 grade? Fuel economy?
Possibly some mpg. Maybe not, since HTHS is more responsible for mpg than viscosity and it’s very close to a 30 grade in that respect. I’ll probably pull a sample at about 1000-1500 miles just to make sure everything is looking good. It’s more of just a trial.
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Does LSJr participate in this forum?
Not that we're aware of. I'm sure he reads stuff here, but unless he's incognito probably doesn't post.
I don't blame him.
Yeah why would he bother to post here for free when he could be making all that clickbait revenue on YT?
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First off, hats off to David to be able to stand next to this guy for however long that study took place because that guy could talk a cat off a fish wagon.
Second, I’d be curious to see what the changes are to the Mobil1 FS 0W40 and if David still feels the same about this oil as he did in the past. Was it a reduction in calcium? Have they dropped their PAO content bellow 30-35% again? I’m very curious because I was thinking of giving the Mobil1 FS a try in a Toyota that calls for 0W20…and it doesn’t bother me a bit it will shear into a 30 weight.
Second, I’d be curious to see what the changes are to the Mobil1 FS 0W40 and if David still feels the same about this oil as he did in the past. Was it a reduction in calcium? Have they dropped their PAO content bellow 30-35% again? I’m very curious because I was thinking of giving the Mobil1 FS a try in a Toyota that calls for 0W20…and it doesn’t bother me a bit it will shear into a 30 weight.
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