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Just clarifying technical information ... too much misconception about multi-viscosity oil (no surprise really). Sorry you can't keep up in the discussion or don't want to expand your oil knowledge, and instead jump in the middle trying to say something is wrong when it isn't, lol

Better re-read what I said. You might be misundertanding who's saying what. What part of what I said do you think I'm wrong about? ... be specific. Read carefully. Again, the W rating is NOT determined by how it "flows" at cold temperature . Read the post right about this one. The W rating...

There's a lot of misinformation even like this on the 'net. Words and terms matter when talking about technical subject matter. There is not an actual viscosity number except for just the max dynamic (cP units) viscosity limit associated with the W grade side of a multi-viscosity oil. Look at...

Wherever you snatched that from isn't quite there technically. The number in front of the "W" does NOT signify the actual viscosity as they mention. It only signifies a "W" Grade rating. The W grade specifications shown in the SAE J300 table is based only on a max viscosity limit for each...

I recall a YouTuber with a car channel talk about how he thought running a 5W-20 on the track would be "better" because it would help keep the oil temperature down some. Then after he ran a few track sessions he discovered his journal bearings were pretty wiped out. He's lucky he didn't seize...

If you look into HTHS viscosity, a very small difference in viscosity can mean a lot in terms of engine wear protection. The differences in viscosity certainly can be significant depending on the use conditions of the vehicle. You wouldn't track your car with 0W-20 oil would you?

Technical discussions don't seem to be your "thing". 🙃

Understanding multi-viscosity oil seems to be one of the most misunderstood topics on a car chat board ... which seems pretty ironic actually. Understanding the deep details of oil filters might actually be more misunderstood than motor oil. 😄

Didn't sound like it originally (post 67), and you still strive (below) to think it should be 30W-5 instead of 5W-30. I know ... I already mentioned that in a previous post 107. The SAE W grades came to be in 1933. You still think it should be backwards simply based on the fact that you...

The numbers aren't backwards (ie, 30W-5) because that's not how oil viscosity grades are defined by the SAE. Peolple misunderstand it because they can't realize that the W grade and the hot viscosity grade are two totally different ways to grade oil viscosity. The SAE started trying to define...

Olive oil is nearly the same viscosity at 130F as a 20 grade motor oil. Go with some 0W-8 if you want thinner, lol.

Having motor oil discussions on chat boards is like watching the movie "Idiocracy". 😄

LoL ... something else you're wrong about, that "we agree". 🙃 Castrol's statement you locked onto is only correct in a specific context. Seems context isn't understood anymore. Everyone knows that a 0W will flow better at 0F (and no, 0W has nothing to do with 0F) than a 10W will - that's...

Look at these figures: "Testing Motor Oil Viscosity" and "SAE Viscosity Grade Specifications". Source: https://pqia.org/resource-center/

Tests used to determine the W grade. These are NOT gravity flow tests. They are done in special test machines to measure the dynamic viscosity at cold temperatures. The HTHS viscosity (at 150C and shear rate of 1 million/sec) is also done in a special dynamic viscosity test machine...

I don't need to see anything again. What Castrol said is basically correct in the context I mentioned. 0W flows better than 5W and 5W flows better than 10W, etc. But the W grade is not determined by a "flow test" measurement. That's the context and focus of this discussion. You took the...

That sentence has nothing to do with how the "W" grade is determined. You're taking that sentence out of context of this discussion. That sentance simply means that the lower the "W" rating, the better it flows when cold. Anyone living in very cold climates knows that. Only a bone head would...

You really don't know the facts. Do some self research, because what I explained is how it's done. There is no "flow test" under gravity involved to determine the cold "W" grade rating. Research it. The only test done by measuring the oil flow under gravity is for the KV100 kinematic...

Do some research - the info on how these measurements of viscosity are done for the "W" rating is easily found. The two viscosity measurements (cold cranking and pumpability) that determines the "W" grade are not flow tests. Only the hot KV100 (kinematic viscosity at 100C) is a gravity flow test.

Which post of yours are you referring to that was "right from the beginning"? Not all of your posts are correct.