Shell Helix (5w40 fully synthetic oil) is a known brand and reasonably priced from eurocarparts, easily available and is 229.5. If you can let me know the cost of liqui moly oil or motel oil, I will research and consider it. I change my oil every year or every 2000 miles which ever comes first. So I do need oil which is easily accessible and reasonably priced.
By the way, most engine oil comes from the same place i.e. same refinery. Mobil oil, very good oil, but you will be paying for the brand name too. That's something to bear in mind.
I do however use liqui moly additive though for my twin camshafts.
On my push rod 345cu Hemi engine, is has single over head camshafts and I just use fully synthetic 5w30 Shell Helix, even cheaper. Happy days