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Probably too close to impossible and/or cost-prohibitive to make a 0W-20 without VIIs.

Blackstone got the same viscosity as the PDS. Credit to them for that. The PDS says HTHS is 2.9 cP, which is higher than most xW-20 oils. See the typical properties section. https://www.redlineoil.com/0w20-motor-oil I prefer their 5W-20 which has 3.1 cP HTHS viscosity, which is more than...

1000 miles is enough to shear some oils that much, in my opinion. With Redline, I doubt it, but that’s without me looking up the virgin viscosity. I would expect less than .4 cST loss, assuming minor fuel dilution.

Other than boutique brands, I think most synthetic 0W-20 oils will have some VIIs. The closer the VI is to being around 140, generally the less the VII content. 5W-20 generally has less VIIs. Don’t put too much emphasis on it because the HTHS viscosity matters more than the kinematic...

Viscosity loss is most rapid early on, then tapers off. That viscosity loss from shearing happens at a faster rate than oxidation. Eventually oxidation will slowly start raising the viscosity, but most people don’t run oils long enough for the viscosity to equal the virgin viscosity. If the...

I agree that there is no AN due to lack of big ripples in the 700s on the x-axis. Bummer.

The different base oils and possibly the different VII types in the mixture can cause unpredictable deviations from calculations that assume no weird interactions. Your two oils’ base oils are similar in solubility, so the risk is minimized. I doubt weirdness will be significant in warmer...

Is AN definitely there or are you saying it might have it? That’s the first time I’ve heard anything about that beyond it possibly having it.

Due to the last SDS I saw and the very low volatility, I think PP Euro 5W-40 has mostly or maybe entirely GTL base oils, which are very close to PAO in properties/performance. There may be some alkylated naphthalene as well. Those are not listed in SDS and nothing in a VOA shows them. It does...

Good 10W-30 synthetic oils do tend to have very little VII or even none and the base oils are relatively viscous, which leads to low volatility. M1 10W-30 EP probably has fairly low volatility but I expect it to be considerably higher than QS UD 10W-30. Same is true for almost every oil. That...

Pennzoil’s website is terrible and I can’t find the product data sheets. Recently, Quaker State removed Euro 5W-40 from their website, so I can’t point you to a definitely current HTHS. Edy gave estimates above. I don’t think M1 0W-40 FS is as good, overall, as these oils, based on my testing...

I would choose based on the HTHS, because the differences are small enough and you aren’t racing the car. I rate them based on volatility and most importantly, on resistance to forming deposits. M1 0W-40 FS in its current formulation is not impressive in those categories. PP and QS Euro are...

5k to 6k mile OCIs with a LL-01 oil sounds like a great plan. PP Euro 5W-40 or QS Euro 5W-40 (same as PP) is what I’d choose in your case, assuming it’s conveniently available to you. They have excellent resistance to forming deposits and have very low volatility. I wouldn’t switch to Red Line.

Here is a picture of the cups after wiping them with rubbing alcohol. I have to sand the varnish off before the next test occurs.

I understand the desire to make an E46 engine last as long as possible. It is the last great 3 Series made, in my opinion. We need more information to give a good answer. How long are your OCIs? How clean does it look through the oil fill hole? What area do you live in?

That would great. Thank you. Perfect testing companion to its 5W-30 brother. Please let me know if you need my address again.

Thank you. Good news is that due to a BITOG member very recently sending M1 5W-30 ESP, I will be testing that next. I have also been testing some HPL oils since late 2024, but I have not been posting the results for several reasons.

This post is about using UOAs to quantify wear rate. Combining elemental UOA analysis and the PQ Index results, the wear particle size issue is greatly reduced. PQ index applies only to iron. Assuming lab errors are small, having elemental and PQ index results provides a fairly accurate...

After ending the test, I poured virgin oil into each cup and they sat until this morning. I stirred the mixtures, then drained the oils. The two M1 oils have a lot of insolubles left behind, while QS Ultimate Durability 10W-30 has almost none. The pictures are not as revealing as my eyes are...

Good video. He provides better information than the majority of people here do, in my opinion. Yet, he gets criticized in a substantial percentage of posts in threads about his videos. My favorite parts, even though I already knew it: rougher surface finish tends to require higher viscosity...