"Better" would be a tad more HTHS as below 2.9 mPa.s is marginal. So substituting a litre of similar/same line oil in the next heavier grade would accomplish that.I made the switch to Castrol Edge EP 0W-20.
It's very smooth and quiet, extremely yummy motor oil
I guess this thread can be closed now.
ex: I sourced and ran VW 508/509 Porsche C20 approved 0W20 in my Jetta turbo. The engine was clattery and wouldn't make power.
Oil was burning off at a alarming rate. I added a litre of M1 0W40 FS then, surprisingly, all was well for the next 6000+ miles until I turned the lease in. You want a "good" oil, but you need the appropriate viscosity for the engine. The specific build clearances and design of your sample engine will dictate the viscosity required.
If your engine runs well with your oil choice, then no further adjustment is warranted.