Welcome to the North American Subaru Impreza Owners Club Saturday October 25, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 02-02-2004, 11:42 PM   #1
nicrfe1370
Scooby Newbie
 
Member#: 52292
Join Date: Jan 2004
Default Big spreadsheet of Used Oil Analyses

I have gathered all of the Used Oil Analyses (UOA) that I could find on the internet, and combined them in one relatively easy to follow Microsoft Excel spreadsheet. If you are interested, go to http://cultofthejedi.com/WRX/oilchange.xls
My thanks to Sith_Lord for hosting the spreadsheet.
* Registered users of the site do not see these ads.
nicrfe1370 is offline   Reply With Quote
Old 02-02-2004, 11:57 PM   #2
tdxflex
Scooby Specialist
 
Member#: 13634
Join Date: Dec 2001
Chapter/Region: NESIC
Location: Boston
Vehicle:
2002 WRX
WRB

Default

Great collection of sortable information here. Never knew Redline had that much more moly than all of the others.
tdxflex is offline   Reply With Quote
Old 02-03-2004, 01:07 AM   #3
nicrfe1370
Scooby Newbie
 
Member#: 52292
Join Date: Jan 2004
Default

I'm glad you enjoy the spreadsheet. Out of genuine interest, I have read many of the threads around here regarding oil use. They always seem to end up in pissing matches, and because there seems to be no objective material to reference, every crackpot who can type in caps and add finger waving graemlins feels that he is right. My desire is to inject a little objectivity in the mix, it remains to be seen if I will have any success.

Last edited by nicrfe1370; 02-03-2004 at 01:13 AM.
nicrfe1370 is offline   Reply With Quote
Old 02-03-2004, 12:13 PM   #4
moogoob
Scooby Specialist
 
Member#: 7101
Join Date: May 2001
Chapter/Region: Tri-State
Location: Toms RIver
Vehicle:
00RS I want to fill
your mouth with spiders

Default

now if i only understood all of this....
moogoob is offline   Reply With Quote
Old 02-03-2004, 12:45 PM   #5
nicrfe1370
Scooby Newbie
 
Member#: 52292
Join Date: Jan 2004
Default

Quote:
Originally posted by moogoob
now if i only understood all of this....

There is a lot of info there for sure, let me tell you the main thing to look for. If you look at "miles on sample", that is how many miles a person used the oil in question without changing the oil. Then you can scroll to the right and look at iron, chromium, lead copper, tin, aluminum, nickel, and silver. These are "wear metals". Various parts in an engine are made with these metals, and as an engine is used, tiny bits of the metal are shaved off, and fall into the oil. What we want to see is all of those numbers as low as possible, that means the engine is wearing as little as possible. At the Bob Is The Oil Guy forums, Subarus are gaining something of a legendary status as wearing the least, even with cheap Wal Mart Tech 2000 oil! Now, if all the wear metals are in the single digits, that's very good. If one or two reach the teens, that's not bad, but it might want to be watched.
According to the results in the spreadsheet, there seems to be no correlation between oil brand or weight, and the wear numbers. The number of UOAs we have to look at might simply be inadequate for legitimate statistical conclusions. Since the overwhelming majority used a synthetic and either 5W-30 or 10W-30, there is little to compare to. There are going to be other ways that one oil might be superior to another, such as how much "gunk" is left in the engine. Unfortunatley, we can't discern that from the UOAs.
I will continue to collect UOAs for the spreadhseet, and maybe there will be a time when trends become apparent. Have your oil analyzed!
nicrfe1370 is offline   Reply With Quote
Old 02-03-2004, 01:51 PM   #6
Unabomber
Big Ron
Moderator
 
Member#: 18062
Join Date: Apr 2002
Chapter/Region: MAIC
Location: I can save you a ton of cash
Vehicle:
on car parts so PM
me b4 j00 buy

Default

That's a pretty up to date report! I see my Mobile 1 Delvac results on there and I just submitted them to bobistheoilguy.com last week!
Unabomber is offline   Reply With Quote
Old 02-04-2004, 02:02 PM   #7
bluesubie
Scooby Guru
 
Member#: 767
Join Date: Jan 2000
Chapter/Region: Tri-State
Location: N.J.
Vehicle:
04 FXT

Thumbs up

Good job!!

-Dennis
mine is line 38.
bluesubie is offline   Reply With Quote
Old 02-04-2004, 04:32 PM   #8
wrpmission
Scooby Specialist
 
Member#: 40540
Join Date: Jul 2003
Chapter/Region: MAIC
Location: Arlington, VA
Vehicle:
2004 Impreza WRX
WR Blue

Default

anybody wanna sum this up, and tell me what oil to buy?
wrpmission is offline   Reply With Quote
Old 02-04-2004, 04:41 PM   #9
Unabomber
Big Ron
Moderator
 
Member#: 18062
Join Date: Apr 2002
Chapter/Region: MAIC
Location: I can save you a ton of cash
Vehicle:
on car parts so PM
me b4 j00 buy

Default

Quote:
Originally posted by wrpmission
anybody wanna sum this up, and tell me what oil to buy?
My 2 cents:

What is the best oil? There is no best oil. Use the type of oil recommended via your owner's manual and change it via the schedules contained within. Consumer Reports' suggestion can be found via this article. For more oil information, visit bobistheoilguy.com.
Unabomber is offline   Reply With Quote
Old 02-04-2004, 08:19 PM   #10
fliz
Scooby Guru
 
Member#: 30342
Join Date: Nov 2002
Location: #blp
Default

I looked at the sheet, and it was pretty meaningless to me

Is there a way to determine a good mileage to be replacing oil from the numbers?

What mileage do oils show an increase in the number of particulates present?
fliz is offline   Reply With Quote
Old 02-04-2004, 09:17 PM   #11
nicrfe1370
Scooby Newbie
 
Member#: 52292
Join Date: Jan 2004
Default

Nothing concrete can be determined from the spreadsheet, but I will explain what I found. If you graph "miles on sample" on the x-axis, and seprately graph lead, copper, and iron on the y-axis, you can begin to see some valuable insight. On the graph with lead, anything beyond 5900 miles and the readings start to get a little "haywire", and a little elevated. On the copper and iron graphs, 5200 miles is the point at which readings go up and become irregular. Based on what I just said, I think 5-6000 miles on an oil change is a good target. This is based on the goal of having wear so low it's almost absurd. Going over 6000 miles is not necessarily bad. Of further note, the overwhelming majority of the UOAs on the spreadsheet are of synthetic oils. So guidelines for non-synthetic or for blends would likely be a bit different.
If you look at the one example of Catrol GTX which is non-synthetic; at 5900 miles, TBN (Total Base Number, essentially an oil's reserve to fight acids) is down near 2, which is commonly held as the lowest one should go. Since Castrol GTX seems to be a well respected mineral oil, it seems that 6000 miles on non-synthetic might be the practical limit.
I hope my observations help.
nicrfe1370 is offline   Reply With Quote
Old 02-04-2004, 09:41 PM   #12
Irishman
Scooby Specialist
 
Member#: 29933
Join Date: Nov 2002
Location: Kalamazoo, MI
Vehicle:
2004 STI
Silver/Silver

Default

what do the viscocity numbers mean? is it better to be higher or lower?
Irishman is offline   Reply With Quote
Old 02-04-2004, 09:46 PM   #13
Irishman
Scooby Specialist
 
Member#: 29933
Join Date: Nov 2002
Location: Kalamazoo, MI
Vehicle:
2004 STI
Silver/Silver

Default

Does synthetic oils give you better gas mileage or is that hype?
Irishman is offline   Reply With Quote
Old 02-06-2004, 01:55 PM   #14
nicrfe1370
Scooby Newbie
 
Member#: 52292
Join Date: Jan 2004
Default

Quote:
Originally posted by Irishman
what do the viscocity numbers mean? is it better to be higher or lower?
Neither is necessarily better or worse. The reason we see that number in Used Oil Analysis reports is so that we can compare it to the known viscocity of the unused oil, to see how much the oil has thickened or thinned.
Synthetic oils do give better gas mileage which has been proven in studies. However it's a small percentage, and most relevant to truckers who want every last fraction of MPG since fuel is such a large expense for them.
nicrfe1370 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
How to dispose of used oil and fuel filters? doubledribble Service & Maintenance 25 04-14-2005 07:19 PM
what kind of engline oil and oil filter do u use? lik Vancouver Impreza Club Forum -- VIC 38 11-04-2003 06:16 AM
big chunks of silicone in my oil filter ahhhh Ghostrider Normally Aspirated Powertrain 21 11-27-2001 02:28 AM
Wich type of motor oil do you use? Santo Domingo 2.5 RS Normally Aspirated Powertrain 23 06-25-2001 10:18 PM
What type of differential oil should I use WRXwannbe Technical Forum Archive 2 07-26-2000 07:07 AM


All times are GMT -4. The time now is 02:51 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.