So I'll write this response as I go through the page. Pretty interesting stuff so far, but I want to totally stress that there are about 50,000,000,000 different types of tests for oil and any single test is not an adequate assessment of the oil's 'greatness' for your engine.
This isa test where they heat the oil to at least 380 Celcius for an hour, while it's exposed to oxygen, and give a visual indication of the deposits, oil breakdown, oil thickening (indicated by either consumption or oil breakdown), oil consumption (as indicated by ash and/or thickening) created as a result. This might simulate oil on the cylinder wall during combustion, but the oil doesn't really stay exposed to that heat and pressure.
They cooked the oil in one position then rotated the oil container so that you can see what was left behind - ash, deposits, thickened oil, sludge, varnish, polymer formation, etc.
I look at this as relevant to our engines from a consumption standpoint. What happens when a given oil is exposed to sufficient heat to generate consumption/burn off. It is NOT a test relevant to say, the ability of an oil's film strength to keep seperate a rod bearing and crankshaft under high load. This is just one example of why a c
So again, take it for what it's worth. here's a brief summary for each U.S./widely available oil I viewed on there:
Castrol Edge 0-40 shows no visual deposits
BMW 0-40 LL shows some varnishing and minor deposits
BMW SAE 0w30 LL shows some varnishing and minor deposits
BMW SAE 5w30 LL-04 shows significant cooking, coking, sludging, deposit formation, and further breakdown
i-Sint and havoline 5w40 are very similar to the last description
Valvoline Synpower 5w30 shows some varnishing and minor deposits
ENEOS 5w40 shows very slight varnishing and minimal deposits
BP Visco 5w40 shows very thick sludging/breakdown, deposits, etc.
Liqui moly 0w40 shows really no visual varnish or deposits. I see some very small pieces in there that would be filtered out.
Castrol Magnatec 5w30 "For ford engines" shows sedimentation/deposits
Mercedes 229.5 original shows significant coking/cooking of the oil
Mobil 1 0w40 "Advanced full synthetic" (US has this available) shows no real deposits and very minor varnishing
Mobil 1 0w40 "full synthetic" shows notable varnishing, no real deposits or coking
Mobil 1 0w30 AFE shows a weird band of varnish and a little bit of cooking/coking
Mobil 1 5w40 "Fully synthetic" shows clumps of oil sludge forming and a coloration I don't know what it is - probably a mineral in the oil actually fully seperating from the oil. Not good.
Motul LL04 5w40 shows moderate coking, varnish, and minor sludging. I was surprised by this one.
BP Visco 5000 SAE 5w40 shows no varnish, coking, sludging, or any signs the oil was stressed.
Lukoil Standard 10w40 shows extremely minor varnish/oil breakdown
LiquiMoly 5w50 shows alot of varnishing and thickening. This is most likely the viscosity index improvers (the things allowing it to be a 5w50) breaking down.
Pentosin Super 5w30 shows some coking and varnishing
Castrol Edge 5w30 shows very minor coking and varnishing
Castrol Edge 0w30 "Professional" shows very significant breakdown leading to clumping and early sludging. Castrol's poorest showing so far.
Shell Helix Ultra 5w40 shows clumping and sludging, pretty significant
Castrol Edge professional 5w30 shows clumping and sludging and some varnishing/thickening
BMW Original 0w40 LL-04 shows significant breakdown and sludging. Most of the oil did not survive this test.
Castrol Edge Sport 10w60 shows notable varnishing and some thickening and minor deposit formation. The test notes to compare it to Pentosin Super as well. since this is particular relevant to this forum, my comment is that this is to be expected. 10w60 has a very significant amount of viscosity index improvers to get it to operate at such extreme viscosity differences. These are very well known to breakdown - that's why 10w60 is often a 10w40 or 10w50 after just 3000-5000 miles. i think that's what we're seeing here.
Motul 300v 5w40 shows a significant amount of deposits, varnishing, but very little sludging/coking. It's an interesting mix - it's like this oil doesn't clump/sludge, but will form deposits.
Motul 8100 Clean shows almost entirely polymerization, where the oil is forming deposits in the form of polymers. Some sludging and coking.
Skipping a few here...
Total Quartz 5w40 - deposits, sludging, coking.
Honda genuine 5w30 (of all things) - Very minor thickening and varnish
Mobil Super 15w40 - a tad of varnish, no deposit, no sludging
Shell Helix Racing Ultra 10w60 - Alot of coking and sludging. Very little varnishing.
BMW High performance full synthetic 5w30 significant coking and thickening
BMW LL-01 5w30 shows some deposit formation and thickening
Castrol Edge Professional 5w30 alot of coking and deposits
Elf Evolution CRV 0w30 Ash seperation/formation and varnishing
Kendall full synthetic 0w20 very minor deposit formation and varnishing
Mobil One 10w60 alot of thickening, varnishing, and some minor deposit formation
Quartz Total 10w40 - one of the best showings - no signs of deposits, varnish, thickening, etc.
Shell Helix Ultra 0w40 significant clumping and early sludging
Castrol Edge Professional LL-III 5w30 deposits forming and significant thickening of the oil
Redline 5w40 is varnishing and shows deposits forming and ash generating
Fuchs Titan GT1 5w40 significant breakdown/cooking/coking
Fuchs Titan GT1 pro 5w30 - excellent showing, bit of varnish/thickening but no signs of deposits or cooking of oil
Liqui Moly SynthOil 5w40 High Tech - Some thickening and varnish but fairly minor
Liqui Moly 0w30 - very minor deposits and thickening, even a slightly better showing than their 5w40