do you guys use 10W/30 or 10W/40?

 

5W-30 because that's what the manual says, but I'm probably going to start using 10W-30 soon because they have a jug of synthetic at a good price at my local store.

Lok in your owner's manual, it tells you oil type according to temperature. Depending on where you live, you might have to use a different oil.

 

0W-30, 5W-30 or 10W-30 are the weights you should be looking at. 5W-30 is preferrable.