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Would it preclude them from running higher viscosity oils? Edit: disregard, already answered in the thread.

Why no euro oils?

Not to start a thin vs thick debate, but by "better oil" do you mean something like HPL/Amsoil/etc. or also a thicker grade like 5W-30?

Interesting. I assume that the Euro specs are more stringent in this regard?

Interesting, so he was telling you to stick with the FS for your BMW if I'm understanding you correctly?

Did he mention anything about how it compares with 0w-40 FS?

I'm comparing the '23 and '24 manuals for the Corolla. They both seem to have the same engine: '23: '24 But the sump capacity seems to have changed '23: '24: Why did they reduce the sump capacity as well?

Sorry to hear how it ended, and I hope everyone was safe. How many miles did you have on it before that?

Thanks! Given the lowish TBN in my report, it seems that a 4K mi OCI is going to push the oil to its limit on this engine. Is this a valid conclusion?

What do you think is doing the cleaning then? As per their website, this oil "Helps provide exceptional cleaning power".

Interestingly enough, less Ca and Moly compared to my last run of the same oil. I had run Valvoline 5W-30 EP before that first run, so perhaps it's the left over oil affecting the numbers as well as the viscosity. Before this OCI, I ran a mix of 5qt Valvoline XL-III 5W-30 (5qt) + 1.9qt...

I'm running SAE 40 EC right now in my Kia (6.89qt sump) and the rest filled with M1 5W-30 EP. Similar winter temps to what you mentioned.

I think they're known for having high moly in their oils.

That makes sense, but what about during the warmup phase? The 40 grade is quite a bit thicker than 20 grade when cold, correct?

Nope! Just something I picked up from flight simulators.

Probably GDI.

There was a little when I changed it (< 0.5qt if I were to guess looking at the dipstick). I found that the oil starts to really darken at around ~3.2K miles and that seems to be where where the consumption starts. This is another reason I'm keeping OCIs to < 4K miles on this engine going...

This is for a sample taken back in Sept. Since then, it's had one OCI on Valvoline XL-III 5W-30, and it currently has M1 ESP 5W-30 (almost due for another change, which I intend to use OA to analyze since they supposedly offer better fuel dilution measurements).

There has to be an upper limit though, correct? Otherwise wouldn't we be able to run 15W-60 in engines recommending 0W-20?

What's the correct way to think about this (or the proper terminology to use, I've seen people use "tolerance" or "clearance")?