Welcome to the North American Subaru Impreza Owners Club Friday December 26, 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 01-24-2002, 12:34 AM   #1
knightsnke
Scooby Newbie
 
Member#: 9461
Join Date: Aug 2001
Location: clifton
Vehicle:
2002 WRX
Blue

Default oil flushing a myth?

I was wondering if flushing the oil out after a oil change is worth it. Meaning after you empty out all the old oil put in a liter or 2 of new oil let it drain out then close the oil drain and fill the new oil up? thanks all
* Registered users of the site do not see these ads.
knightsnke is offline   Reply With Quote
Old 01-24-2002, 02:35 AM   #2
Alan
Scooby Specialist
 
Member#: 3601
Join Date: Jan 2001
Chapter/Region: NWIC
Location: Tigard, Oregon
Vehicle:
2006 WRX Wagon
BRIGHT BLUE!

Default

A far better way to flush the lubrication system is to refill the engine with oil, after draining the old oil, then run it a few miles, THEN change the oil & filter. I do this ever 10,000 miles and it makes the oil system quite clean. Cheap thrill, all it cost is about 4 quarts of oil - maybe $3-4.
Alan is offline   Reply With Quote
Old 01-25-2002, 03:34 AM   #3
Jung918
Scooby Specialist
 
Member#: 10969
Join Date: Oct 2001
Location: Orange County
Default

THey sell oil flushes at pep boys... You simply add the oil flsuh to your old oil and let it run for like 5 minutes and then drain it... But i hear that with synthetic oil that it really is not nessecary...
Jung918 is offline   Reply With Quote
Old 01-28-2002, 01:28 AM   #4
Joelk
Scooby Newbie
 
Member#: 7790
Join Date: Jun 2001
Chapter/Region: MWSOC
Location: Minneapolis
Vehicle:
2003 wrx
sy

Default

Diesel fuel works well also. Seriously... Fill your engine up with that, run it for a few SECONDS, then drain it out. It does a very good job of removing any build-up. I don't think you'd ever need to do this unless the engine has been sitting for a LONG time, probably a technique best used on lawnmower engines anyway....
Joelk is offline   Reply With Quote
Old 01-28-2002, 11:59 AM   #5
jhuang76
Scooby Newbie
 
Member#: 1284
Join Date: Apr 2000
Vehicle:
2005 Legacy GT
Royal Blue Pearl

Default

The safest bet is to just change your oil frequently. As far as the diesel fuel suggestion - do it at your own risk. Fuel dilution of oil can be a major concern due to viscosity modifications and possible interaction with the additives/byproducts in the oil.
jhuang76 is offline   Reply With Quote
Old 01-28-2002, 02:07 PM   #6
Richard L.
Scooby Specialist
 
Member#: 8465
Join Date: Jul 2001
Chapter/Region: NWIC
Location: Puget Sound, WA
Vehicle:
'00 2.5RS Coupe, AW
'93 GMC Typhoon AWD

Default

Be careful when using oil flush. If your engine has pretty high mileage and lots of sludge, using an oil flush might dislodge a big piece of sludge or deposit which could clog an oil gallery.

AMSOIL makes a pretty safe synthetic oil flush:

1) http://www.amsoil.com/products/aef.html
2) http://www.pecuniary.com/synthetics/engineflush.html

In fact, it is recommended that you use this flush before switching from conventional motor oil to AMSOIL synthetic motor oil.

--
Richard
Richard L. is offline   Reply With Quote
Old 02-27-2002, 08:14 AM   #7
Frederf
Scooby Specialist
 
Member#: 15622
Join Date: Feb 2002
Location: Campbell, CA
Vehicle:
2002 WRX SW
WRB

Default

Sounds like a good idea... but what do you mean only costs 3-4$? A full treatment of engine oil costs me at least 25$!
Frederf is offline   Reply With Quote
Old 02-27-2002, 10:46 AM   #8
Alan
Scooby Specialist
 
Member#: 3601
Join Date: Jan 2001
Chapter/Region: NWIC
Location: Tigard, Oregon
Vehicle:
2006 WRX Wagon
BRIGHT BLUE!

Default

Well, if you are changing your own oil - as I do - then the extra cost of putting in 4 quarts of new oil after draining the old oil is $3-4. One does not need premium or synthetic to run through the engine for 10 minutes. Then the "cleaning oil" is drained and tossed, the filter is changed, and you've got a really clean engine inside.

Quote:
Originally posted by Frederf
Sounds like a good idea... but what do you mean only costs 3-4$? A full treatment of engine oil costs me at least 25$!
Alan is offline   Reply With Quote
Old 03-25-2002, 10:03 AM   #9
shortlid
Scooby Newbie
 
Member#: 10297
Join Date: Sep 2001
Chapter/Region: Tri-State
Location: Nashua, NH
Vehicle:
2003 Legacy GT Sedan
Silver, 4EAT, 42k

Default don't

Motor flush is just Kerosene and it can damage newwer enginbe seals!! It is only for Fire trucks that never get up to operating temp for like 10 years of life!
shortlid is offline   Reply With Quote
Old 03-25-2002, 07:08 PM   #10
GLwagon
Scooby Specialist
 
Member#: 16696
Join Date: Mar 2002
Chapter/Region: MWSOC
Location: Baraboo, WI
Vehicle:
2002 WRX Sedan Stg2
2013 OBW roll'n at 30+mpg

Default

I can tell you one thing for shure...
if you buy an old cheep junker with high miles for playing with
DO NOT use any type of over the counter "engine flush"
you may/will remove sludge that was keeping the motor happy
also if any thing chunky comes makes it to the pickup it might clog it too.
this is only a problem on cars that people used Old Pensoil on or neglected badly...
I think they reformulated the mix in the 90's...
Also... Using a Synth. (like Mobil1) in an old jallopy does wonders for creating leaks in engines you never knew you had...
GLwagon is offline   Reply With Quote
Old 03-25-2002, 07:16 PM   #11
hotrod
Scooby Specialist
 
Member#: 14141
Join Date: Jan 2002
Location: 13.239@102.85 @ 5800 ft on 13T
Vehicle:
2002 Impreza WRX

Default drain it hot, no flush

Waste of time , money and oil.

The safest way to do it is to not change the oil until the engine is hot. Run a couple errands (ie go buy the oil and filter). Come home drain the oil immediately, and let it drain for several minutes. I wait until it stops dripping.

The thin oil will drain almost completely, without any risk of oil contamination of the new oil, or any of the problems with rinsing out seals so they leak.

Modern oils especially the synthics are very good detergent oils. The habit of using a flush oil orginated many decades ago when lots of people used non-detergent motor oils, so gunk would collect in the bottom of the oil pan, and in the cylinder head valleys.

Larry
hotrod is offline   Reply With Quote
Old 03-26-2002, 01:46 AM   #12
Sam2
Scooby Specialist
 
Member#: 15265
Join Date: Feb 2002
Location: Austin Texas
Vehicle:
2002 WRX Wagon
WR Blue

Default Re: oil flushing a myth?

Quote:
Originally posted by knightsnke
I was wondering if flushing the oil out after a oil change is worth it. Meaning after you empty out all the old oil put in a liter or 2 of new oil let it drain out then close the oil drain and fill the new oil up? thanks all
Not sure you got simple answer. Just put oil in top and let drain out bottom does nothing really because its not going though the engine really, just draining to the pan.

Agree most else said here. High miles engine is best left alone.

Kerosene is cheap effective flush, $1 gallon as good as anthing you'll buy $2 quart. For most part, nowadays, none of this needed. Gas, oil, and engines all cleaner than in 1960.

Change oil. If oil is black as tar at 1000 miles, then change it again, repeat short change intervals as and if needed.
Sam2 is offline   Reply With Quote
Old 03-26-2002, 01:50 AM   #13
Sam2
Scooby Specialist
 
Member#: 15265
Join Date: Feb 2002
Location: Austin Texas
Vehicle:
2002 WRX Wagon
WR Blue

Default

> This is only a problem on cars that people used Old Pensoil on or neglected badly...

Even worse.... Quaker State....
(both old high content parrifin wax oils)
Sam2 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
Drain and refill A/T tranny oil in-between each full tranny oil flush? dcwrx2 Service & Maintenance 8 02-25-2009 05:30 PM
Engine oil flush in a 00RS, yay or nay??? Rallly2000 Normally Aspirated Powertrain 16 08-15-2008 01:24 PM
25,000 miles and switching over to synthetic oil - do i need an engine oil flush? anthonyrb98 Service & Maintenance 1 04-25-2005 07:21 PM
Oil Flush Idea Sideshowbob Service & Maintenance 17 02-12-2005 10:57 AM
Oil Flush? blitzpb Service & Maintenance 2 01-28-2004 01:30 PM


All times are GMT -4. The time now is 02:50 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.