Exactly - and for @Ducati996 - I would lean towards an A3/B4. It is a higher viscosity than specified for your engine, but fuel economy is no longer an issue for you. More importantly, A3/B4 is a long drain interval specification that was recommended by Volvo a decade or two ago to clear up previously sludged engines. Not your engine, exactly but Volvo’s recommendation is the important bit.A5/B5 comes from ACEA A5/B5 and it defines the minimum quality level of a product, specifically for european engine oils. A for gasoline cars, B for diesels so in this case it's a dual spec.
A5/B5 means it has a reduced veiscosity (for fuel economy reasons) but it has to stay in grade during use so needs at least some shear stability. This is a bit contrary to Ilsac oils. Another requirement is reduced volatility compared to API oils.
I haven't looked at the restore and protect 5W-30 in detail but if you need a cleaning oil for a reasonable cost that's the way to go.
Here is the service bulletin: https://www.lydellmotorsltd.com/Files/PDF/aera-bulletin.pdf
Again, not your engine, but it is exactly your situation and manufacturer.
So, the 5W30 Restore and Protect is a reasonable approach for you. I would not run it much past 5,000 miles, though, without checking the filter for contamination. If it works as advertised (and I have no personal experience with it) then your filter will accumulate carbon bits as a result, and changing the filter before it plugs up it’s important.
My personal experience with cleaning up a Volvo Engine (again, earlier generation than yours) and the resultant filter debris, is outlined here:
Thread 'Volvo Cartridge C&P Mahle 2002 Volvo V70XC using HPL 0W30'
https://bobistheoilguy.com/forums/t...mahle-2002-volvo-v70xc-using-hpl-0w30.384625/