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Flushing an Engine with Flushing Oil? #4678762
02/26/18 02:57 PM
02/26/18 02:57 PM
Joined: Dec 2015
Posts: 13
Shropshire
jtaylor2005 Offline OP
jtaylor2005  Offline OP
Joined: Dec 2015
Posts: 13
Shropshire
Hi All,

Going to be doing an oil change soon on my Diesel. It's tuned to about 50% more than stock HP so want to give it a good treat. It's nearly at 100k miles now so I want to do a flush.

I have found some SAE 30 flushing oil. Is it worth running that through first to clean out the engine? I'd like to try and keep my new oil as clean as possible as I am going to get some really good quality stuff.

If it's worth doing what would be the best procedure to follow?

Thanks laugh

Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4678779
02/26/18 03:15 PM
02/26/18 03:15 PM
Joined: Jun 2014
Posts: 2,442
Phoenix, Arizona - USA
SirTanon Offline
SirTanon  Offline
Joined: Jun 2014
Posts: 2,442
Phoenix, Arizona - USA
Seems like a waste to me. It would help, however, to know what kind of oil you normally run in that engine. If your normal oil is a quality oil, then I'd say don't waste the time/money running that SAE30 "flushing oil" through it. Just drain and refill with the good stuff.


2010 Ford Fusion SE - 2.5 liter/6F35 Trans - 261,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 56,000mi
Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4678782
02/26/18 03:17 PM
02/26/18 03:17 PM
Joined: Aug 2010
Posts: 5,651
Champlain/Hudson Valley
Kira Offline
Kira  Offline
Joined: Aug 2010
Posts: 5,651
Champlain/Hudson Valley
I'm going to guess that there's no need for a "flushing oil".
If there is history of neglect there might be a use for a solvent style cleaner but then again, the avalanche of opinions here recommend a short OCI or two with cheaper oils. You don't appear to have that option.

Common use with fair or better maintenance? Just use your good oil.
What engine in what vehicle did you tune so heartily?

Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4678783
02/26/18 03:18 PM
02/26/18 03:18 PM
Joined: Feb 2015
Posts: 2,195
Slovenia EU
Kamele0N Offline
Kamele0N  Offline
Joined: Feb 2015
Posts: 2,195
Slovenia EU
Thats my advice...

Look online...and try to find cheapest ester oil you can get (its usually motocycle oil) and use it as a top off oil just before your OCI

Thats it....


2011 Hyundai i30 1.4 CVVT Shell Helix Ultra 5w40
1997 Toyota Landcruiser KZJ95 3.0 TD Shell Rimula R6M 10w40
Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4678804
02/26/18 03:38 PM
02/26/18 03:38 PM
Joined: Dec 2015
Posts: 13
Shropshire
jtaylor2005 Offline OP
jtaylor2005  Offline OP
Joined: Dec 2015
Posts: 13
Shropshire
Dammit!! Again wrong forum section! It's a 2l HDI engine. It's been a great car to me so I am determined to keep it really nice laugh

General consensus is that it's not worth flushing if good quality oil has been used previous. That has been the case with it as it's usually had shell helix ultra 5w40 oil.

Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4678806
02/26/18 03:43 PM
02/26/18 03:43 PM
Joined: Feb 2015
Posts: 2,195
Slovenia EU
Kamele0N Offline
Kamele0N  Offline
Joined: Feb 2015
Posts: 2,195
Slovenia EU
Why are you complicating then? OCD? smile


2011 Hyundai i30 1.4 CVVT Shell Helix Ultra 5w40
1997 Toyota Landcruiser KZJ95 3.0 TD Shell Rimula R6M 10w40
Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4678823
02/26/18 03:54 PM
02/26/18 03:54 PM
Joined: Dec 2015
Posts: 13
Shropshire
jtaylor2005 Offline OP
jtaylor2005  Offline OP
Joined: Dec 2015
Posts: 13
Shropshire
100% OCD :P

Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4678896
02/26/18 04:51 PM
02/26/18 04:51 PM
Joined: Dec 2011
Posts: 1,731
War Eagle
toneydoc Offline
toneydoc  Offline
Joined: Dec 2011
Posts: 1,731
War Eagle
You are already using good oil. No need to flush


1994 Jeep 159k Mobil 5000 5w30
2014 Camry 34k Havoline 5w20
2018 Jeep Cherokee 2k FactFill
2014 HD Ultra 40k Mobil1 15w50
2012 Rav4 37k Pennzoil Platinum 5w20
Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4678938
02/26/18 05:42 PM
02/26/18 05:42 PM
Joined: Oct 2014
Posts: 11,821
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,821
Idaho
What are you going to be flushing out?


"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf
Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4679001
02/26/18 06:58 PM
02/26/18 06:58 PM
Joined: Aug 2014
Posts: 68
Texas
DallasTexas Offline
DallasTexas  Offline
Joined: Aug 2014
Posts: 68
Texas
I have used Kreen on my E300 diesel with almost 278-300k miles, with outstanding results. My nephew is still driving it with almost 336k mile.


06 E320 CDI 98k miles
14 Sienna 33k miles
96 E300 297k miles Donated
Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4679086
02/26/18 08:06 PM
02/26/18 08:06 PM
Joined: Mar 2004
Posts: 20,747
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 20,747
Upstate NY
Run synthetic 5W40 and change it at reasonable interview. Your engine will most likely blow up from tuning before it has and oil related issues.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4679131
02/26/18 08:49 PM
02/26/18 08:49 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
Originally Posted By: jtaylor2005
Going to be doing an oil change soon on my Diesel. It's nearly at 100k miles now so I want to do a flush


Diesel engines do make "black" oil.....

But I have been wrenching on diesels for almost 40 years,
and I have never seen ANYTHING that looked like "sludge"
like you'd see in gas/petrol cars from the 60's and 70's and 80's.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4679143
02/26/18 08:59 PM
02/26/18 08:59 PM
Joined: Jul 2005
Posts: 8,816
Maricopa, AZ
dave1251 Offline
dave1251  Offline
Joined: Jul 2005
Posts: 8,816
Maricopa, AZ
You are using a high quality oil. Just continue using it at reasonable intervals.


make the inside of your engine oil cap white.
don't use.
Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4679187
02/26/18 09:36 PM
02/26/18 09:36 PM
Joined: Feb 2014
Posts: 2,285
Kansan,1911 45ACP fan
Marco620 Offline
Marco620  Offline
Joined: Feb 2014
Posts: 2,285
Kansan,1911 45ACP fan
Just run a air compressor at low power into crankcase to rid excess oil. Make sure all moisture is gone first before. I do this rarely but find afterward my car takes a bit more oil.


15' Civic 179k.0w20 Redline/Archoil9100,Eibach,Yokohama/Borla Exhaust/Tein Suspension/Fu7317/Redline Si-1
Right to work state proud. Non union household
Re: Flushing an Engine with Flushing Oil? [Re: jtaylor2005] #4679295
02/26/18 11:21 PM
02/26/18 11:21 PM
Joined: Sep 2015
Posts: 5,844
Kalifornia Kollective
BrocLuno Online content
BrocLuno  Online Content
Joined: Sep 2015
Posts: 5,844
Kalifornia Kollective
Over the road trucks go 1,000,000 miles without any "flushing"... 20,000 mile oil changes and just good HDEO.

Many of those engines are are well over 1 hp/cu in and run the distance.

What do you think needs flushing?

Last edited by BrocLuno; 02/26/18 11:22 PM.

Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
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