Hans Brouwer wrote:
>
> The engine (165,000 kilometres) runs better (less noisy) with  Valvoline
> 20W50 than with Mobil 1 15W50. I blame it on the Mobil 1 being thinner than
> the Valvoline.
>
> Is there a synthetic 20W50?
>
> Hans Brouwer

Mobil 1 does come in a 20w50 but you will have a hard time finding it at
Wal-Mart etc.

Redline also makes a 20w50 synth oil, as do others.

TBerk