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  
T-Squared

Type of Oil for LS1

Recommended Posts

T-Squared

I bought a RLX last summer and I am doing the spring de-winterize right now. Biggrin.gif I have heard mixed reviews on what oil to run in the LS1. My dealer says 15W-40, a mechanic says 20w-50. I did research online and I really couldn't find much. It seems the hardcore Corvette guys run Mobil 1 synthethic. The oil cap says 15w-40, I want other opinions on this.

Does anybody have a LS1 in there Bu?

Your comments are greatly appreciated.

Thanks,

Tobi

Edited by ResponseLX375

Share this post


Link to post
Share on other sites
SmoothWaterMan

I assume the boat has over 100 hours, therefore you are welcome to use Mobil 1 Synthetic if you like. 15w-40 is the standard baseline, and we run it here, but 20w-50 is a good alternative if you don't have 15w-40 or you have a liking to 20w-50.

It's been beat to death around here, and everyone will reccomend to make sure you use the same grade as reccomended, but I'm not sure you can buy a sub-grade oil at your parts store. (There's a can of worms I just opened, eh?)

Peter.

Share this post


Link to post
Share on other sites
T-Squared
I assume the boat has over 100 hours, therefore you are welcome to use Mobil 1 Synthetic if you like. 15w-40 is the standard baseline, and we run it here, but 20w-50 is a good alternative if you don't have 15w-40 or you have a liking to 20w-50.

It's been beat to death around here, and everyone will reccomend to make sure you use the same grade as reccomended, but I'm not sure you can buy a sub-grade oil at your parts store. (There's a can of worms I just opened, eh?)

Peter.

My boat has around 360 hours on it. My father-in-law has a 06 VLX with the monsoon and he uses 20w-50 because 15w-40 is hard to find without the diesel additives unless your at your dealer or somewhere like Westmarine. I would imagine that 20w-50 would be a little cheaper because you wouldnt have to get it at your dealer. Dontknow.gif

Today I am taking my boat out for her Shakedown cruise, its finally warm enough here in MI. Yahoo.gif

Thanks for the Info!.

Share this post


Link to post
Share on other sites
electricjohn

Most major oil companies don't make a 15w-40 syn, including Mobil. Shell is the only one I've noticed that has that grade. 20w-50 is more common in syn.

Share this post


Link to post
Share on other sites
VinRLX

I believe Amsoil has diesel/marine rated 15w-40 synthetic. If you want to spend the $.

Share this post


Link to post
Share on other sites
T-Squared
Most major oil companies don't make a 15w-40 syn, including Mobil. Shell is the only one I've noticed that has that grade. 20w-50 is more common in syn.

Thanks for the info.

I guess I should have said 10w-30 Mobil 1. Altough I think that atleast at a min. you should be running 15w-40.

I think I am going to go with 20w-50 syn., it seems to me the best way to go. This is a big change for me since I went from my 88 Centurion with a 351 to a 00 RLX with a LS1. Malibu Rocks!! Rockon.gif

Share this post


Link to post
Share on other sites
Daman

There is no reason you can't run 15-40 diesel oil in this engine, diesel oil is very similar to non syn racing oil. Personally I use John Deere 15-40wt same as marine grade and its inexpensive. If you are changing your oil at every 100hrs then there is no issues anyway, and actually I like to change the oil around 75hrs.

Share this post


Link to post
Share on other sites
MalibuNation
I bought a RLX last summer and I am doing the spring de-winterize right now. Biggrin.gif I have heard mixed reviews on what oil to run in the LS1. My dealer says 15W-40, a mechanic says 20w-50. I did research online and I really couldn't find much. It seems the hardcore Corvette guys run Mobil 1 synthethic. The oil cap says 15w-40, I want other opinions on this.

Does anybody have a LS1 in there Bu?

Your comments are greatly appreciated.

Thanks,

Tobi

Below is the answer I got from Indmar ... I have a LS1 also:

The owners manual indicates that you need to wait till the engine has 100 hours before using synthetic oil. Mobil 1 does not make a 15W40 oil but does have a 15W50 which is what I would recommend.

Larry Engelbert

Indmar Service

Share this post


Link to post
Share on other sites
electricjohn

Any 15w-40 diesel oil with a CH-4 or CH-4+ rating is a listed oil to use in our engines. These oils will also (should) have the API SL or (even better) SM rating.

Edited by electricjohn

Share this post


Link to post
Share on other sites
LS1boarder

Uh Oh, I have an LS1 engine in my bu' and I just put Mobil 1 10w-30 in it. The engine has 30 hours on it, should I change to something else until I hit 100 hours? I've only run it about 2 hours with the new oil in it.

Share this post


Link to post
Share on other sites
electricjohn

Yea, I would, especially if your engine calls for a 40 wieght oil. Check your oil caps on the valve covers to see what grade to use. Mobil 1 is one of the thinnest syn oils made. Their 10w-30 is more like a 10w-25 right out of the bottle. Not sure if you have to wait 100 hrs before going to syn with the LS-1 engine, check on that too. For the last few years Vettes' come out of the factory with M-1 in the engine. Put the 30 wieght oil in your car instead of dumping it and $40.00 down the drain if you decide to change it out. 30 hrs on the motor? That's 7 hrs a year????

Share this post


Link to post
Share on other sites
LS1boarder

Yeah I just bought the boat and the previous owner never used it. I got pretty lucky with my purchase! So, how bad is it to leave my 30 hour engine with syn in it? I want to change it to the 15w-50, but it's a synthetic. Thanks for all your replies!

Share this post


Link to post
Share on other sites
electricjohn

I would listen to the 100 hr. recommendation. There is no need to use syn in our engines anyway. The main advantage of syn. oil today is the extended oil change intervals. If you plan on using your boat 300 hrs this year without an oil change, then syn would be a good choice. Otherwise there is no real advantage to it, being the gap between syn and conventional oil's lubricating abilities have closed considerably in the last few years.

Share this post


Link to post
Share on other sites
LS1boarder

Great!! I'll change it before my next outing. Thanks for the advice!!

Share this post


Link to post
Share on other sites

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...