We’d recommend running Yamalube 4M marine oil in both outboards. Yamalube’s new 4M Full Synthetic is intended primarily for use in Yamaha’s new V MAX SHO four stroke outboards, but it also provides tangible benefits for other Yamaha and non-Yamaha four stroke outboards as well. Using it will result in lower internal friction and you’d most likely see a small increase in fuel economy (maybe 5% or so). Oil change intervals remain the same as Marine Performance 4M (100 hours or annually).

I have a 02- 200 four stroke on my 22 grady White seafarer,and the 06-f150 on my Aquasport Osprey 200.should I switch to full synthetic on both.Thanks for posting your videos.