Pat Goff can tell you the peril of running cheap oil in your motor. I would run Yamalube & Ring Free.
Check out domo-line.com Even with paying cheaper it's going to be cheaper than buying it retail. The dealerships are a rip-off.
As an example I run Evinrude XD-100 and get it for $34.50 delivered to my door.
2015 Seaark 1872 MV CC
Etec 90 HP
Bitter Gun Owner