Go Back  Offshoreonly.com > Technical > General Q & A
Marine Lubrication >

Marine Lubrication

Notices

Marine Lubrication

Thread Tools
 
Old 11-20-2006, 12:07 PM
  #941  
Registered
 
Join Date: Oct 2005
Location: New Hartford CT
Posts: 756
Likes: 0
Received 1 Like on 1 Post
Default Re: Marine Lubrication

Originally Posted by Hydrocruiser
This was posted on a site that tests synthetic oils:

Ever since Mobil lost their lawsuit against Castrol (they objected to the fact that Castrol "synth" was made from Group III base stock instead of being truly synthesized), and the court decided that the word "synthetic" was related to oil performace, not exactly how it was made, most manufacturers of "synthetic" oils switched to using Group III base. Mobil 1 was one of the last holdouts.
Can't speak about other oils because I don't use them, but Spectro Oil's full synthetic is still a group IV PAO, no group 3 at all. Ken
minxguy is offline  
Old 11-20-2006, 04:36 PM
  #942  
Registered
 
Join Date: Aug 2005
Location: Manitowoc, WI
Posts: 67
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Marine Lubrication

Originally Posted by minxguy
Can't speak about other oils because I don't use them, but Spectro Oil's full synthetic is still a group IV PAO, no group 3 at all. Ken
AMSOIL is also still a Group IV with adds of V with the exception of the XL line of car oils.

http://www.amsoil.com/products/motor...spx?zo=1132530
o2man98 is offline  
Old 11-20-2006, 07:17 PM
  #943  
Gold Member
Gold Member
Thread Starter
 
Hydrocruiser's Avatar
 
Join Date: May 2004
Posts: 5,762
Likes: 0
Received 1 Like on 1 Post
Arrow Re: Marine Lubrication

Originally Posted by o2man98
AMSOIL is also still a Group IV with adds of V with the exception of the XL line of car oils.

http://www.amsoil.com/products/motor...spx?zo=1132530
The old Series 3000 and 2000 were GRP IV. I understand.

I am not switching to a GRP IV. personally over this.

If I see a flashpoint drop on a brand then I would be alerted to a possible concern. To date I do not see this happening.

Amsoil..M-1..Redline..RP...etc are all good.

Last edited by Hydrocruiser; 11-20-2006 at 07:21 PM.
Hydrocruiser is offline  
Old 11-21-2006, 12:00 PM
  #944  
Gold Member
Gold Member
 
Rage's Avatar
 
Join Date: Sep 2005
Location: Missouri
Posts: 1,987
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Marine Lubrication

Attached is chart of Blackstone Lab analysis of Mercury 25W40 and Mobil1 20W50 V Twin used in my Mercruiser 496.
It is not a good A - B comparison because the 25W40 was run 90 hours in a dead stock 496HO (425hp) and the Mobil 1 20W50 VTwin oil was then run 80 hours after the same engine had been converted to a Gen1 HP3 (~525hp) except the 5150rpm rev limit remained. Both were driven exssentiall the same. The only changes were HP3 heads, HP3 cam and HP3 valve train (except a lower load valve spring was used in lieu of the high load Nascar valve springs) and addition valve relief was added to the stock pistons (while still in the engine). The lower end of the engine was not dissassembled.

That being said I am still more than a bit surprised by the dramatic increase in wear versus the Mercury 25W40 and what appears to me to be generally high wear numbers with the Mobil1 20W50 VTwin oil versus the Blackstone "UNIVERSAL AVERAGES".

Comments/thoughts on these results are solicited.
Attached Files
File Type: pdf
496 BLACKSTONE OIL ANALYSIS.pdf (11.7 KB, 173 views)
Rage is offline  
Old 11-21-2006, 03:06 PM
  #945  
Registered
 
sleeper_dave's Avatar
 
Join Date: Apr 2005
Posts: 725
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Marine Lubrication

So you ground a valve relief into the pistons while they were still in the motor?

I'd figure a lot of your wear metals are from doing that. Did you do an oil change shortly after the modifications, or is that v-twin oil the stuff you put in when you got done hopping it up? I would think that the new cam and valvetrain would result in more metal in the oil.

Fuel is high and flashpoint is low, though. Tune issues, maybe? Or maybe the extra 100 hp just takes a lot out of a motor?
sleeper_dave is offline  
Old 11-21-2006, 03:10 PM
  #946  
Gold Member
Gold Member
Thread Starter
 
Hydrocruiser's Avatar
 
Join Date: May 2004
Posts: 5,762
Likes: 0
Received 1 Like on 1 Post
Arrow Re: Marine Lubrication

Originally Posted by Rage
Attached is chart of Blackstone Lab analysis of Mercury 25W40 and Mobil1 20W50 V Twin used in my Mercruiser 496.
It is not a good A - B comparison because the 25W40 was run 90 hours in a dead stock 496HO (425hp) and the Mobil 1 20W50 VTwin oil was then run 80 hours after the same engine had been converted to a Gen1 HP3 (~525hp) except the 5150rpm rev limit remained. Both were driven exssentiall the same. The only changes were HP3 heads, HP3 cam and HP3 valve train (except a lower load valve spring was used in lieu of the high load Nascar valve springs) and addition valve relief was added to the stock pistons (while still in the engine). The lower end of the engine was not dissassembled.

That being said I am still more than a bit surprised by the dramatic increase in wear versus the Mercury 25W40 and what appears to me to be generally high wear numbers with the Mobil1 20W50 VTwin oil versus the Blackstone "UNIVERSAL AVERAGES".
Comments/thoughts on these results are solicited.
Good observation.

The reason the universal average is higher is because increased detergency specific to the product frees up sludge and metal particles thereby increasing "wear metal content" from a long time back.

We have known this for a while.

Last edited by Hydrocruiser; 11-21-2006 at 03:12 PM.
Hydrocruiser is offline  
Old 11-21-2006, 03:15 PM
  #947  
Gold Member
Gold Member
Thread Starter
 
Hydrocruiser's Avatar
 
Join Date: May 2004
Posts: 5,762
Likes: 0
Received 1 Like on 1 Post
Arrow Re: Marine Lubrication

FYI..I checked my sources and a trend is that there is a blending of PAO III. (highly refined) and IV. basestocks occuring to various degrees. Some synthetics are 100% GRP III. and some 100% GRP IV.

This does not worry me for the most part as synthetics still have the edge and the products are continuing to perform well vs. non-premium conventionals.

I suspect based on oil tests that it is safe to say that the more a product costs on average.. the more GRP IV. is in the formulation.

I would not "diss" a premium oil such as Mercury 25W-40 or Kendall 20W-50 as they work well and conversely would not say all "synthetics" are "equal" either.

As far as synthetics go the rule is the more it costs the better the product performs. You do get what you pay for.

Last edited by Hydrocruiser; 11-21-2006 at 03:20 PM.
Hydrocruiser is offline  
Old 11-21-2006, 04:34 PM
  #948  
Registered
 
Join Date: Oct 2004
Location: Lake Havasu City, AZ
Posts: 63
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Marine Lubrication

I've followed this thread for some time, and I'm more confused then ever. I don't care what an oil change costs, if I can extend engine life, but I don't know what the best oil would be.
phebus is offline  
Old 11-21-2006, 08:10 PM
  #949  
Gold Member
Gold Member
Thread Starter
 
Hydrocruiser's Avatar
 
Join Date: May 2004
Posts: 5,762
Likes: 0
Received 1 Like on 1 Post
Arrow Re: Marine Lubrication

Originally Posted by phebus
I've followed this thread for some time, and I'm more confused then ever. I don't care what an oil change costs, if I can extend engine life, but I don't know what the best oil would be.
Amsoil Premiums/Mobil-1 EP & V-Twin/Redline/Royal Purple

Pick the right viscosity and you are good to go.

If you are paying $6-9/qt you got the good stuff in the crankcase.
Hydrocruiser is offline  
Old 11-21-2006, 08:59 PM
  #950  
Registered
 
berns29scarab's Avatar
 
Join Date: Jul 2004
Location: Toms River, NJ
Posts: 7,141
Received 10 Likes on 7 Posts
Default Re: Marine Lubrication

Originally Posted by Hydrocruiser
Amsoil Premiums/Mobil-1 EP & V-Twin/Redline/Royal Purple

Pick the right viscosity and you are good to go.

If you are paying $6-9/qt you got the good stuff in the

crankcase.
so your recommendation for a pair of 280 hour 502 mpi's would be what...this thread is confusing as hell...lmfao going to change out whats in there now when i winterize her with a basic 10/40...then in the spring (i already have wix filters) you'd use which...
berns29scarab is offline  


Quick Reply: Marine Lubrication


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.