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!

What oil is everyone using in their boats?


cjespinoza

Recommended Posts

I was just going through the different threads on winterizing and see that Rotella oil no longer meets the requirements to use it in our boat engines.  In some of the comments people are using Delo 15W-40 instead.  I am curious if this is true for many of you.  I have a 2005 Malibu Response LXi.  Thank you for your responses.

Link to comment
4 hours ago, cjespinoza said:

I am curious if this is true for many of you. 

Well, only those of us who will bother to reply to your post.  I'm guessing we'll be the same crowd that replied to the other oil threads....

Delo for me as well.

  • Haha 2
Link to comment

I have still been using the Shell Rotella T4. I contacted Indmar in 2019 when I noticed that the SM rating was no longer present. This was their response “Keep using the Rotella, It is just fine.”

I have a 2007 with the 5.7L. 

Link to comment
44 minutes ago, RebesMalibu said:

I have still been using the Shell Rotella T4. I contacted Indmar in 2019 when I noticed that the SM rating was no longer present. This was their response “Keep using the Rotella, It is just fine.”

I have a 2007 with the 5.7L. 

Rotella is fine too.  I still use the t6 15w40 in my motorcycles.  

 

 

 

 

Link to comment
1 hour ago, RebesMalibu said:

I think I will switch to the Valvoline. I like the idea of the oil having the gasoline rating as well. 

That's why a lot of us switched to Delo.  It has both C and S ratings.

Link to comment
3 hours ago, Nitrousbird said:

Mobil One Full Synthetic in 10W40.  ~$24 for 5 quarts at Walmart.  

Same here, every two years. Analysis says that is overkill by the way.

Edited by electricjohn
Link to comment
  • 2 months later...

Shell Rotella T4 15W-40 - I've been using it for years with no issues.  Worth noting, until today, I had no idea that Rotella no longer has an API "S" category rating for gas engines.  

IMHO, Shell probably didn't change anything about Rotella or downgrade it so, it's likely the same old Rotella, minus the API "S" category on the label.  My guess is, maybe the lawyers decided that they should remove "S" from the label, since Rotella was largely designed, labeled and marketed as diesel oil, as denoted by the API "C" category.  Worth noting, on another forum, I read that some oils formulated for diesel can cause damage or shorten the life of catalytic converters, citing higher levels of phosphorous.  This was a general oil forum so, they were not talking specifically about marine engines.  Regardless, in marine applications, diesel oil formulations would not be an issue with pre-catalyzed engines but, they could be an issue with catalyzed marine engines...Who knows?

I am not going to loose any sleep over having Rotella in my engine.  I was planning on switching to a full synthetic in the spring, anyways. 

Any suggestions for 15W-40 Full Synthetic?

Link to comment
  • 3 weeks later...
On 1/6/2023 at 2:18 PM, SkiBumPMC said:

Shell Rotella T4 15W-40 - I've been using it for years with no issues.  Worth noting, until today, I had no idea that Rotella no longer has an API "S" category rating for gas engines.  

IMHO, Shell probably didn't change anything about Rotella or downgrade it so, it's likely the same old Rotella, minus the API "S" category on the label.  My guess is, maybe the lawyers decided that they should remove "S" from the label, since Rotella was largely designed, labeled and marketed as diesel oil, as denoted by the API "C" category.  Worth noting, on another forum, I read that some oils formulated for diesel can cause damage or shorten the life of catalytic converters, citing higher levels of phosphorous.  This was a general oil forum so, they were not talking specifically about marine engines.  Regardless, in marine applications, diesel oil formulations would not be an issue with pre-catalyzed engines but, they could be an issue with catalyzed marine engines...Who knows?

I am not going to loose any sleep over having Rotella in my engine.  I was planning on switching to a full synthetic in the spring, anyways. 

Any suggestions for 15W-40 Full Synthetic?

Back when I was turning wrenches on a farm, we ran Schaeffer full synthetic in everything. We never had any complaints with it other than cost, I even credit it with keeping a brand new tractor engine alive after the oil filter gasket failed and pumped all the oil out over 2 passes of the field. It ran at high RPM, high load for a couple minutes before the guy operating it decided all the red "stop engine" lights and alarms were for real. We filled the crankcase back up and it fired right off, no bearing noise, no less oil pressure than before running dry.

Link to comment

I started using Schaeffer in my Dodge diesel truck years ago when I lived in Indiana, and it was amazing what it did for cold winter starts. So I started using it in my 2005 Response LXI and it in increased my oil pressure by about 10 psi. Have been using it since.

Link to comment

Castrol EDGE Advanced Engine Oil Full Synthetic 5W-30

I forget how I came to the decision that it was the same stuff as the Indmar oil many years ago, but I've been running it ever since.

And I use this stuff in the Tranny.

Castrol Transmax Dexron VI Automatic Transmission Fluid

I think I just pick up Indmar V-Drive fluid from the dealer when I need it.

Link to comment

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.

×
×
  • Create New...