I'm helping a friend install a new Suzuki 140hp 4 stroke on his bay boat. The dealer says to run any kind of 10/40 oil. I suggested that he run Suzuki Oil. The dealer again says any 10/40 will do. Do any forum members have a reccomendation?
Any approved (by Suzuki) petro 10/40 is fine for break in, Bob. Be sure he doesn't use any synthetic during break in.<br /><br />After break in of my Suzi I switched to Mobil 1, but I think any oil that meets the specs put forth in the Owner's Manual will do just fine.<br /><br />While outside advice can be good or bad, the Owner's Manual is your best advisor.<br /><br />Good luck.
We use Chevron 10-40, service manual has different wts for different temps zones. On some engines that see a lot of hours we use 15-40 Chevron delo 400.
