switching to synthetic oil

[rivercat49]

I have a new yamaha 150 4stroke with 1 hour on it. I want to switch to synthetic oil and want<br />to know if the proper time is at the first service.(10 hours) Also if using a synthetic would it still <br />be necessary to use ring free in the fuel?

 

[rickdb1boat]

Re: switching to synthetic oil

Personally, I would ring up the dealer and get his advice. After all, if something happens, he's the one ya got to deal with. Barring that, I would at least wait till it's broke in and then switch. There's so many different debates on synthetic oil here, that I would have to defer to the dealers advice for your particular motor..

 

[JB]

Re: switching to synthetic oil

Moving to General Outboard

 

[JB]

Re: switching to synthetic oil

I wouldn't switch before the end of break-in, Rivercat. Synthetics can slow down the seating of rings and bearings.<br /><br />I switched my Suzuki DF70 to Mobil 1 after 20 hours.<br /><br />Good luck.

 

[BillP]

Re: switching to synthetic oil

Like JB says your motor may not seat the rings. As a reference: Kohler voids the warranty on their small water cooled 4 stroke commercial engines for that reason. The rings don't seat, a glaze happens and compression never developes. It happens quickly. The only way to remedy this is to take the motor down and hone. Best bet is to contact your motor dealer and ask.

 

[Jammu]

Re: switching to synthetic oil

Can you tell us why you should use syntetic oil in that engine ??

 

[rivercat49]

Re: switching to synthetic oil

I have been told from a number of salesman and mechanics that the synthetics will help prevent wear and offer higher temprature protection.

 

[LubeDude]

Re: switching to synthetic oil

Everyone knows Im all for synthetics, but follow the manufactures recomendation for break in and then go for it!!

 

[Forktail]

Re: switching to synthetic oil

Your new Yamaha F150 makes no recommendation, either during break-in or normal use, for using synthetic or non-synthetic motor oils. They only specify an API certified SE, SF, SG, SH, or SJ grade 10W-30 or 10W-40.<br /><br />This outboard does not require synthetic oil, or ring-free in the fuel. But you could certainly use them, at any time if you feel they would benefit you. However, I would recommend following the change interval regardless of the type of oil used.<br /><br />I get exceptional performance and longevity in my Yamaha 4-strokes using quality conventional motor oils.