Sierra Engine Oil

[vaboatdoc]

Ive been using sierra stern drive 25W-40 engine oil in my engine. I have a 4 cylinder 3.0L inboard\outboard. Is this a good oil to use or should i be using the 10W-30 oil? Ive heard that because of the load these engines see that it is better to use a heavier weight oil. I live in a relatively mild climate.

 

[fyrfightr]

Re: Sierra Engine Oil

25w40 is the proper weight oil to use per the Merc Manual.

 

[bruceb58]

Re: Sierra Engine Oil

Oh NO!!!!!!!!!!!!!!!!!!!

Another oil thread!!!!!!!

 

[Fun Times]

Re: Sierra Engine Oil

You are more then likely better off sticking with what you have already ran in the past, Changing oil brands and weight's now after using the other stuff for so long is just really not the best choice to do to the engine, Drive, Ect,.
And like fyrfightr said, 25w40 is the proper weight oil to use per the Merc Manual.
Just my "02" worth is all.

 

[Gary H NC]

Re: Sierra Engine Oil

Oh NO!!!!!!!!!!!!!!!!!!!

Another oil thread!!!!!!!

LOL!!......Here we go again!

Stick to the oil you have been using...10w-30 is not a good choice.

 

[havasuboatman]

Re: Sierra Engine Oil

The Sierra oil is exactly the same as the Merc oil in every sense but one... Price.