Oils aint oils?? - BMW Forum - BimmerWerkz.com
Product Reviews A place to review purchased products and new products for your BMW.

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 04-14-2010, 10:12 AM
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Posts: 2,405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice
(Thread Starter)
Oils aint oils??

Well in my endless probing around the internet I came across the Royal Purple oil brand. Its not a brand that I had heard much about, and definitely have no experience with. I was specifically interested in their claims relating to their Automatic Transmission Fluid and it's ability to keep the transmission 20F cooler than other oils, so I contacted them and asked them to confirm that the MAX ATF was the correct product for use in the 740iL (E38) gearbox. They responded that it was and put me in touch with the Australian distributor and their website, they had an article by one of the Australian car magazines which didn't test the ATF, but it did do an engine oil test (of sorts) which rated the Royal Purple product fairly highly. So if you are interested in reading that article visit http://www.royalpurple.com.au/articl...supplement.php , it makes some interesting observations about some well known synthetic oils, and how poorly they performed in this particular test. I am interested in other members experience with this brand.

Now back to the ATF discussion, when I had the transmission oil changed (137000km) for the first time I suspect, it was nasty, black and smelly. The problem is that you only get roughly half of the oil out by dropping the pan, there is a lot left within the torque converter which is diluted by the fresh oil and progressively removed in subsequent changes. The Australian Royal Purple distibutor offered up this suggestion on getting more oil out of the system with each change:

Before removing the auto pan, disconnect the return line to the transmission cooler and run the engine which will pump all the fluid out, then remove pan change filter and total refill from there.



This procedure will not harm anything and is the best way to get all the fluid out in one hit and as Chris advised using a flush in an auto is flirting with danger.



A couple of questions come to mind straight away,
1. What sort of pressure is the oil coming out of the oil cooler at?
2. The torque converter will eventually run out of oil, but is this a problem for a short time, given that as soon as the oil output falls, you turn off the engine?
3. How do you refill the torque converter once you have dropped the pan, changed the filter, seal & gasket? Is it simply a matter of filling the pan as per normal, then starting the engine for a minute to fill the torque converter body and ATF radiator, top up the pan and thenrestart the car a couple of times, checking the oil level to make sure that everything is as it should be?

Any thoughts on this suggestion by the RP Australian guy, who commented that they had a fleet of BMW hire cars that were using the RP engine and ATF oils without issue.
brettski is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 04-14-2010, 11:39 AM
Help from over the pond
 
marti5's Avatar
 
Join Date: Sep 2008
Location: IPSWICH. U.K.
Posts: 3,242
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
marti5 is on a distinguished road
1. Pressure is farily high but not so you cant control it....

2. No problem there as they are fitted dry in the first place.

3. Youve answered you own question just follow the fill procedure as normal but this time it will probably take about 10ltrs

But you will still have fluid in the VCB so it wll only be about 90% drained of the old fluid and you dont want to be taking the VCB apart believe me.

VELVET BLUE UK INDIVIDUAL , IM THE LAST
UNITED WE STAND DIVIDED WE FALL

I stepped in a plate of Pasta the other day - now I have to worry about my Carbonara footprint!
marti5 is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > General Category > Product Reviews


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Who should use Synthetic Oils? Answered. brettski FAQ's and DIY's 0 01-31-2010 01:22 AM
Switching OILS MEDSTUDENT87 5-Series (E12,E28, E34, E39, E60) 5 01-05-2010 03:29 AM
Valvoline Oils jas81172 3-Series (E21, E30) 0 11-29-2009 05:33 AM
Synthetic vs Petroleum oils mnichols M-Series (M1, M3, M5, M6) 2 02-12-2008 11:29 PM

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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome