5W-30 out 0W-20 In

VolvoUhu said:

CarParts Discount is where I've been getting LiquiMoly Special Tec V 0W-20. There are other places where I've also seen it including by Total and Ravensol which make special Volvo flavored 0W-20. I've not seen Castrol's version except at our dealer but I had been taking LiquiMoly to them since our first 10k service in 2018. Back then they were using 5W-30 which I wanted to avoid since we do tow a lot. About 14% of our miles driven with our T8 are towing (our 2010 has been even a higher %) year round and in extreme winter conditions over mountain passes.

See the "Extreme engine operation" section - to me that was an indication that it was the better choice overall.

Although ours is a T8, I would imagine you have the same in your owner's manual plus under our hood we have this label which was likely something they didn't want to sacrifice on for T8 models given they need to survive a higher rate of cold engine starts while the vehicle is already at speed and on/off cycles than a T6. The ICE is the same between T6 and T8 with the difference being the extra electric drive bits.

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Capndirk said:

What is specced for your engine? That Castrol is A1-B1, which is what my 09 XC90 3.2 is supposed to have. That spec has been obsoleted to A3-B3. I think the viscosity may be a little better if it crept up to 30w. I bought Mobil 1 A3-B3 0-30w from Costco. Be careful with A5-B5, though, it may not be good for earlier engines.
https://www.castrol.com/en_us/unite...astrol-edge-brand/castrol-edge.html#tab_0w-20

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