Jump to content

Welcome to TheMalibuCrew!

As a guest, you are welcome to poke around and view the majority of the content that we have to offer, but in order to post, search, contact members, and get full use out of the website you will need to Register for an Account. It's free and it's easy, so don't hesitate to join the TheMalibuCrew Family today!

Sign in to follow this  
WBL skier

SM/CG vs. SJ/CG4 oil--does it matter?

Recommended Posts

WBL skier

I purchased some diesel oil last night (Rotella 15w40 SM/CG) for my Indmar monsoon. The indmar manual calls for SJ/CG4 oil. Does this difference matter? I wasn't able to find any SJ/CG4 oil, it was all SM. Maybe is has just been updated and is fine to use? Thanks.

Share this post


Link to post
Bobby Light

The SM oil is a newer API standard and can be used instead of SJ. It has a better addative package, use away.

Share this post


Link to post
WBL skier

Thank you!

The SM oil is a newer API standard and can be used instead of SJ. It has a better addative package, use away.

Share this post


Link to post
85 Barefoot

To OP, it is my understanding that as the ratings get "better", the lower ratings are all surpassed. In other words, at the time of your manual, SJ was standard, M follows J in the alphabet, and is approved for use in any engine requiring a rating "below" the Oil's rating letter.

Share this post


Link to post
Slayer

To OP, it is my understanding that as the ratings get "better", the lower ratings are all surpassed. In other words, at the time of your manual, SJ was standard, M follows J in the alphabet, and is approved for use in any engine requiring a rating "below" the Oil's rating letter.

I have the same understanding.

Share this post


Link to post
electricjohn

Correct, SN rating came out recently and reflects an improvement in the oil to work properly with direct injected engines. It is also better than SJ, SL, and SM rated oil in non DI engines. As for the diesel rating, they are now up to CJ-4, which is a low soot formulation. Again better than CG or CG-4. There is no such thing as a bad oil anymore.

Share this post


Link to post

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...