> Don't shoot me!  Stupid question.  Just want to be sure...

 > 10W40 in the summer and
 > in the winter????

 > 1.9 and 2.1's.

20w50. Period. If you want to use Synthetic try 15W50.  You shouldn't
be using 10W40 in the summer unless you are in Antarctica (or using
some other engine than a wasserboxer.)

It's all in the manual (including temperature ranges). Bentley too. And
about 300,000 messages in the archives.