[JoeyWelch]

I always used Yamaha oil & filter when I changed mine in the F250 but I am looking at one that has 115's on it, 01 models and the maintence log shows the oil being changed every 100 hrs but he has been using:

Oil Filter: NAPA 1358 Gold series
Oil: Castrol synthetic blend 10w30

Is this a problem? Should I be concerned or is the Yamaha oil just a warranty stipulation.
Anything to be concerned about? Thanks.

 

[markw4321]

Joey,

You will get many different opinions. I have 2006 twin 115's. once the warranty period was over in 2009 I switched from yamalube to Mobile one full synthetic but I still buy the Yamaha filters.
People say that automotive oil doesn't have the corrosion preventive properties of a marine grade oil. My thought is we are talking about the inside components of an engine here not the outside...

Yamalube is a synthetic blend I am told...
But Yamaha doesn't manufacture oil someone makes it for them,

When I flew in the navy we used full synthetic oils in all aircraft gearboxes and I believe in it. Mobile 1 is cheaper than yamalube as well. My 2 cents.

 

[markw4321]

Castrol is good oil. A compression check would tell you something about engine wear. I recently did mine and all cylinders both engines were around 200 psi. I have around 400 hours on the engines.

 

[JoeyWelch]

Thanks Mark. That's what I needed to hear.

 

[TheCaptKen]

As long as the oil that you use meets or exceeds Yamaha requirements, you are good.

 

[markw4321]

joey check your pm's.

 

[chad403]

You need to use Marine Grade oil. These oils contain formulas to prevent rusting and corrosion. Marine oil is made for motors to sit for long periods of time unlike cars.

 

[JoeyWelch]

A boat that belongs to me sitting up for long periods won't be a problem.

I can't sleep right if it sits very long. It's horrible!!