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

 

[tpenfield]

Here is the rear labeling . . .

 

[paulswagelock]

Triax might be ok oil. The thing is, they mislead with certifications. Their oil is not NMMA certified, that is easy to look up.

 

[dingbat]

Should be able OK to use on those 20 hour, end of season oil changes.

 

[jlh3rd]

eh.....fwiw.

 

[Bt Doctur]

mercruiser V6 flat tappet motor .I use this runs cooler, has high zinc, and has much better oil pressure when hot

Shell Rotella 5 gal. 15W-40 T4 Motor Oil​