Char's new tranny and Oil change. - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Reply
 
 
 
Thread Tools Search this Thread
Old 04-22-2007, 04:34 PM   #21
Senior Member
Posts like a Turbo
 
LeSabreUltra's Avatar
 
Join Date: Feb 2007
Location: Alabama
Posts: 494
Thanks: 0
Thanked 0 Times in 0 Posts
LeSabreUltra is on a distinguished road
Default

What about Royal Purple? I've heard that stuff is really good. Just found a source for it, too. It'* going in both of my cars.
.
.
.
LeSabreUltra is offline   Reply With Quote
Old 04-22-2007, 04:59 PM   #22
Senior Member
True Car Nut
 
Join Date: Sep 2004
Location: Farmington, Minnesota =MWBF '05 SURVIVOR= =CEBF '06 SURVIVOR= =August '06 COTM=
Posts: 9,130
Thanks: 0
Thanked 0 Times in 0 Posts
LakevilleSSEi is on a distinguished road
Default

Both very good lubricants, but I lean to the most experienced.

Not much comparative data out there. Do have RP motocycle data and they seem to be a little more volitile and didn't fair as well in viscosity shear stability. Don't know if you can relate that to their other oils, but in general, AMSOIL is the only one with additive packages geared for longer intervals. (More for your money)

AMSOIL is actually comparable price wise if you buy it the correct way

Here is a response from AMSOIL tech support I saw was asked some time ago:

Quote:
As you may know, Royal Purple is big in racing circles. The chemistry they use is something we choose not to use. One of our big selling points is extended drain intervals. Some additive chemicals can cause adverse conditions when used for long periods.

Royal Purple uses a different chemistry than most. They are one of only a handful of marketers using Moly in their oil. Moly is a solid, specifically banned by Cummins, due to excessive valve train wear.

Moly (Molybdenum Disulfide) is a processed mineral that is similar in appearance to graphite. Moly has good lubricating properties when used either by itself (in dry power form or as an additive to oil or other lubricants). Particles of the Moly can come out of suspension and agglomerate. This can actually clog oil filters or oil lines and the rest normally settles in the bottom of the oil pan. This seems to be more likely when using extended drain intervals. The only test we ran on RP involved their 20W50 Racing oil versus our AMSOIL Series 2000 Synthetic 20W50 Racing Oil (TRO). We ran two 4 ball wear tests with different parameters, a spectrographic baseline, FTIR scan and volatility tests. The Royal Purple showed a significantly high volatility rate with a 12.51% boil off rate. This compares to TRO with a 4.47% volatility rating. Wear scars were also smaller with the TRO. For example the TRO left a .41mm scar and the RP oil left a .66mm scar. There was also a surprising difference in the viscosity index. The RP has a VI of 129 versus 155 for the TRO. The higher the VI, the better the viscosity stays in place at high temperatures.
This information was provided by AMSOIL Tech Department. They had an independent lab test Royal Purple against AMSOIL. The results are posted above. They have found Moly in Royal Purple. As stated above, this can have negative effects on your engine.

-Nate
LakevilleSSEi is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Oil and oil filter change Danthurs Normal Maintainence 0 03-04-2009 04:10 PM
Oil Change- Oil Leak guls 1992-1999 5 03-04-2009 08:32 AM
Change the oil pan drain plug without changing the oil too 93-SSE General GM Chat 16 10-23-2007 04:47 PM
Oil gauge/DIC change oil now question. Pearl_bonnie02 2000-2005 7 11-01-2006 07:14 PM
Oil Change and now Tranny problems? pfogle 1992-1999 25 01-31-2004 07:11 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:07 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.