10w-30 vs 25w-40

[hipster dufus]

wanted to pick up 30me 4 stroke oil for my 30 hp efi tohatsu 4 stroke. the fella in the parts room reccommended 25w-40. it is awfully hot in GA. water temps in high 80s. any opinions? which would u use? same price, mercury branded

 

[ondarvr]

I'm sure the guy behind the counter knows a lot more than the Factory about the oil needed for this motor.

 

[KD4UPL]

I'd put in exactly what the manual calls for; nothing else.

 

[jimmbo]

Mercury has been known to update their lube requirements. Mercury only seems to have 10W- 30 and 20W - 40/50 oils. In Canada anyway. I can't access the US site

Here the pic and text are out of sync https://www.mercurymarine.com/en/ca/...-outboard-oil/

 

[Sea Rider]

wanted to pick up 30me 4 stroke oil for my 30 hp efi tohatsu 4 stroke. the fella in the parts room reccommended 25w-40. it is awfully hot in GA. water temps in high 80s. any opinions? which would u use? same price, mercury branded

Call Tohatsu and ask them which grade oil to use in hot environments...

Happy Boating

 

[pvanv]

Page 10 of the owners manual lists Type FC-W, SAE 10w-30 or 10w-40. We prefer non-synthetic oil.