Personally I would use 20/50 only if I felt the oil pressure was low.
   Before I went to Mobil 1 (15W50), I used 15W40 Rotella T from Shell.

I use 15W40 in all my vehicles other than my vanagon.

Larry A.

bueses wrote:
> I dropped the 84 Westy off at my longtime local vw mechanic for a quick once
> over, fuel lines, coolant hoses, change the oil, double check my aux.
> battery installation, etc. before heading to see the man burn.
>
> When I told him, I had 20/50 weight dino oil in it, he said he could do that
> but didn't recommend it. Thought 10/30 or 10/40 at the highest to not blow
> out seals, etc.
>
> I know we have beat this to death recently, but I can't seem to access the
> archives. Help? What weight oil for a 1200 mile  rd. trip to BFE Nevada w/
> temps over 100?
>
> TIA,
>
> Tom
>