Steve Barker LT wrote:
small engines haven't changed. The only reason they are recommending the
multigrades is for emissions ratings. Also, it is more likely someone will
have a multigrade on their shelf than a straight weight. Small engines use
straight 30.

But what I am saying is that synthetic multi grade such a 5w30 really
is a straight weight. That is the way it is made. It doesn't get as
thick when it gets cold and is far superior for small hot running
engines. It doesn't have all or need those Viscosity Improvers used to
make conventional multi-grade.

Just take a look at the manufacturers literature and you will see they
even say multi-grade conventional is OK.

http://www.briggsandstratton.com/dis...sp?docid=64066