James Ballen wrote:
> It's a 5w-40, which I know isn't right for the WBX, although it seems to run fine...
> I am in the Bay Area, CA...so the temperatures are pretty moderate.

The 5W-40 (5 Winter 40) just means that in cold weather a cold engine
will see it as 5 weight and when the engine is warm it'll see it as 40
weight.  At operating temperature, the engine wouldn't be able to tell
the difference between that and 10W-40.

In northern Maine winters I'll use a 5W-50 or even a 0W-50 synthetic as,
at our minus temperatures, the engine wouldn't start otherwise.

Mike