Ah, forgot to mention Kawasaki have a similar chart to the B&S one you mentioned before, it gos from 5W-20, for below -20C to 0, then overlapping through 10W-30, 10W40, SAE 30 and lastly SAE 40 for 20C to 40C+. So it is recommended. (PDF won't let me copy it.)
Would probably only use SAE 40 for the hottest 3 months of the year.
Just wondering what others thoughts are?
