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Only in Russia someone would run SAE 20W-50 at −30 ℃ and ignore the good old saying "Do not race a cold engine."

I have been doing a roughly 10k-mi/1-yr OCI on my Prius Prime PHEV with the free Toyota maintenance. However, it has expired and I will buy the $150 per three oil changes/tire rotations/multipoint inspections ($50 an oil change) AdvantageCare package available in my area so that I can get an oil...

This the new Toyota engine architecture. It is specifically designed with a "continuous variable-capacity oil pump" for "low-viscosity engine oil," the latter of which is SAE 0W-16. The next-generation Toyota engines will be designed for "ultra-low-viscosity engine oil" (JASO GLV-1), which is...

Enough with that! You can't even get synthetic oil in Mexico, let alone SAE 0W-16.

There is no such study. All the longest-lasting engines run SAE 0W-20 or SAE 0W-16, and none of them are thick-Euro-oil-running European engines. https://www.iseecars.com/car-lifespan-study

This is interesting, given that Red Line High-Performance is a boutique oil. It is almost at the ILSAC level apart from a slightly elevated phosphorus (ILSAC maximum: 800 ppm). It is also mid-SAPS (0.6% < SA ≤ 0.8%). This goes along what I have been saying about all API-SP oils having reduced...

You can calculate it two at a time.

𝛼 is an empirically determined parameter.

This is the first time I heard about the "triple-action formula." The values I used are for the version with API SP and dexos1 Gen 3. M1 EP 0W-20 SP/dexos1 Gen 3 is still OK to use. The HTFS viscosity decreased by 0.15 cP and VII content increased by 1.75% (hence a higher VI of 181), but that...

More details were provided at the LA Auto Show. Also play the video under "related media." https://pressroom.toyota.com/poised-for-performance-2023-toyota-prius-prime-revealed/

I put a few Mobil 1 API-SP oils into the HTFS/VII calculator. They don't provide HTHS in the PDS, but I can estimate it by adjusting it so that the base-oil viscosity index (BO VI) ~ 135. That said, most API-SP Mobil 1 oils have a reduced VII content and a higher HTFS viscosity...

I like that. Here are the Lamborghini Huracán, 2023 Prius Prime, and Tesla Model 3.

Different viscosity grades share the identical additive pack for a given oil line because that's how the additive packs get tested and approved for blending—only the base oil (BO) and amount of viscosity-index improver (VII) differ.

I want one!!! "hybrid reborn" concept: Gen 5 designed from scratch for a new era of PHEVs 2.0 L engine 220 hp (223 PS) combined power 0–62 mph in 6.7 s 13.6 kWh battery improved battery power (that will hopefully let the defogger operate without ICE unlike in Gen 4) battery mounted under rear...

Here is the German owner's manual. Nothing changes. An ILSAC 0W-20 is recommended for the Toyota 2GR-FKS engine: https://d24bc9lyrt5en5.cloudfront.net/Customer-Portal-Admin/emanuals/LEXUS/OM9A020M_v1.pdf https://www.lexus.de/customer/manuals

Official oil recommendations are not found on oil-blender websites. They are found in owner's manuals. Let's see the German owner's manual then.

I think the OP's car has a Toyota A25A engine. Nevertheless, the Lexus UK owner's manual recommends an ILSAC 0W-20 for 2GR-FKS: https://d24bc9lyrt5en5.cloudfront.net/Customer-Portal-Admin/emanuals/LEXUS/OM48K51E.pdf

Toyota neither "requires" nor recommends an ACEA-C3 oil for this engine in Europe. The oil recommendation in Europe for the Toyota A25A/A25B-FXS engine is the same as in the US: SAE 0W-16 ILSAC GF-6B or API SN and above. It is the same language for thicker oils in certain driving conditions or...

Moreover, this oil recommendation is for cars equipped with a gasoline particulate filter (GPF) or diesel particulate filter (DPF). You cherry-picked a GPF-equipped car to falsely claim that Honda recommends mid-SAPS ACEA C2 instead of ILSAC in Europe. Honda does not even sell GPF-equipped cars...

@edyvw uses SAE 0W-20 in his Honda.