On Tue, 1 Nov 2005 14:36:30 -0900, "Lets Fly"
wrote:

Hi Everyone

I have a Cessna 180H (66), the previous owner used 15W50, i since changed to
SAE 50 W 100 in summer and was looking to go to SAE 30 W 65


Depends on the climate you live in. If you live up north that isn't a
bad idea. If you live in Texas 40 should do it for you. Look at the
recommended temperature ranges given for each type of oil. That'll
give you a good idea of what you should do.

z