Is this engine oil good?

[Rivergator]

I came across what I consider a great substitute engine oil that seems to meet all the Mercruiser requirements and is reasonably priced at $36.94 for a 5 quart jug. That is enough to do a 4.3 ltr. engine including filter. I's called Triax Marine Ultra, is fully synthetic and I saw it on Amazon. It even includes shipping. What do you think?

 

[alldodge]

Look at the back of the bottle and read the API certification label. Think it should be SJ

 

[Rivergator]

Quicksilver so conveniently does not disclose any certification data on their oils other than FC-W. Quicksilver is at best a blend. I believe Mercury specifies a fully synthetic oil. The rating on Triax is NMMA, FC-W, API SM, JASO MA. I think that's better than OEM but I don't know what all of that means

 

[Lou C]

No one can really say. If you run it do a Blackstone oil analysis and then you’ll know. I’ve had good results with both the conventional Merc 25/40 & syn blend 25/50. I do an oil analysis at the end of each season.

 

[alldodge]

https://www.nmma.org/certification/oil/fc-w

 

[dingbat]

Look at the back of the bottle and read the API certification label. Think it should be SJ

SJ is no more.
Latest formulation is SP