I now use Castrol 5W50 in my '85 Westy and have had no issues with it
for the last two years.

When it's cold the engine "Thinks" it has 5 weight in it and after the
engine warms up it "Thinks" it has 50 weight in it.

The 5W50 allows cold weather starts such as in the -0� F temperatures we
have in northern Maine and it also offers the necessary higher viscosity
for extended freeway travel.  Remember, with a functioning thermostat,
the engine, when warmed up, won't know if it's summer or winter.

Mike

Jack R. wrote:
> I always ran Castrol, QT, 5W50 Full Syntec Motor Oil; it seemed to cover me
> well in the winter as well as the summer in my 1.9L WBX.
>
> Any concerns with this oil? Other's experiences?
>
> What is the "oil brand and weight of choice for all season application" in a
> 2.1L?
>