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Magnatec 10w40 after 9500 kms #4698654
03/18/18 12:08 PM
03/18/18 12:08 PM
Joined: Mar 2016
Posts: 63
South Africa
Matt97 Offline OP
Matt97  Offline OP
Joined: Mar 2016
Posts: 63
South Africa
Changed the oil today on my Mazda 323 ,B3 engine,after running 9500 kms on Magnatec .Oil was pitch black and dead thin.Expected more from a premium oil in a simple engine ? Only 8 months since the last change.Was hoping to do 15000kms on that fill however the lifter noise made me change earlier .

Re: Magnatec 10w40 after 9500 kms [Re: Matt97] #4698691
03/18/18 01:09 PM
03/18/18 01:09 PM
Joined: Jul 2009
Posts: 828
texas
danez_yoda Offline
danez_yoda  Offline
Joined: Jul 2009
Posts: 828
texas
Was this the first time using magnetec. What was used before? It could be magnetec was cleaning old sludge and possibly got some fuel dilutin that made it thin.


With any new oil change, give it a few changes and see if it gets better.

My wifes new to us 07 sienna with 25k miles did the same to us with penzoil platinum. First change wasblack and thin as [censored]. New two got better buy the fourth one, it was still pancake syrup brown/clear after 5k and then s i started pushing it to 8k. Nowadays i stick with 5k since oil is so cheap and oc are easy for me.

Last edited by danez_yoda; 03/18/18 01:10 PM.
Re: Magnatec 10w40 after 9500 kms [Re: Matt97] #4698709
03/18/18 01:32 PM
03/18/18 01:32 PM
Joined: Jul 2017
Posts: 542
Texas (south)
FermeLaPorte Offline
FermeLaPorte  Offline
Joined: Jul 2017
Posts: 542
Texas (south)
All oils thin out in my engine when they get near the recommended OCI mileage. Maybe it is something peculiar and particular to your engine. Don't rule that out.


Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.
Re: Magnatec 10w40 after 9500 kms [Re: danez_yoda] #4698755
03/18/18 02:24 PM
03/18/18 02:24 PM
Joined: Mar 2016
Posts: 63
South Africa
Matt97 Offline OP
Matt97  Offline OP
Joined: Mar 2016
Posts: 63
South Africa
It was the first time on Magnatec .Car has done 255000kms on Shell/Total 20w50 oils .Fuel dilution is a point as its only driven (many) short distances

Re: Magnatec 10w40 after 9500 kms [Re: Matt97] #4699007
03/18/18 06:34 PM
03/18/18 06:34 PM
Joined: Oct 2004
Posts: 8,487
Cincinnati, OH, USA
bullwinkle Offline
bullwinkle  Offline
Joined: Oct 2004
Posts: 8,487
Cincinnati, OH, USA
Black & thin generally means fuel dilution. Anybody in SA do UOAs? If it never gets cold there, 20W50 could handle more fuel without getting thin, it was an old standby in my younger days of leaky carburetors (Castrol GTX).

Last edited by bullwinkle; 03/18/18 06:35 PM.

06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: Magnatec 10w40 after 9500 kms [Re: Matt97] #4699114
03/18/18 07:49 PM
03/18/18 07:49 PM
Joined: Dec 2016
Posts: 7,502
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,502
Waco, TX
Originally Posted By: Matt97
Oil was pitch black and dead thin.


It will probably seem pretty thin compared to the 20W-50 you are used to.

You would need fuel dilution and also viscosity tests from an oil lab to tell you "more than what meets the eye"


"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: Magnatec 10w40 after 9500 kms [Re: Matt97] #4699159
03/18/18 08:33 PM
03/18/18 08:33 PM
Joined: Apr 2016
Posts: 1,656
Oregon
1JZ_E46 Offline
1JZ_E46  Offline
Joined: Apr 2016
Posts: 1,656
Oregon
Hard to blame the oil without a UOA.


2007 X5 4.8i: M1 HM 10W-30
2016 Countryman S: EDGE 0W-30
Re: Magnatec 10w40 after 9500 kms [Re: Matt97] #4700374
03/20/18 05:20 AM
03/20/18 05:20 AM
Joined: Mar 2016
Posts: 63
South Africa
Matt97 Offline OP
Matt97  Offline OP
Joined: Mar 2016
Posts: 63
South Africa
Oil analysis is generally only done by suppliers for big fleets,price for a one off test is prohibitive. Tend to agree with fuel dilution as its a carb engine running many stop starts.

Re: Magnatec 10w40 after 9500 kms [Re: Matt97] #4700376
03/20/18 05:22 AM
03/20/18 05:22 AM
Joined: Mar 2016
Posts: 63
South Africa
Matt97 Offline OP
Matt97  Offline OP
Joined: Mar 2016
Posts: 63
South Africa
The service manual calls for a 20w50 oil changed at 10000km intervals. Old engine design, first in use in the late eighties

Re: Magnatec 10w40 after 9500 kms [Re: Matt97] #4700389
03/20/18 05:52 AM
03/20/18 05:52 AM
Joined: Sep 2010
Posts: 7,901
Texas
4WD Online confused
4WD  Online Confused
Joined: Sep 2010
Posts: 7,901
Texas
We just changed Magnatec 5w20 that was extremely black and thick at only 4K miles. Engine has but 45K.
Same oil before and after but bought some QSUD and will give it a bit of chemical change after this ...
Odd part in seeing it so thick was a fuel smell 3.6L Pentastar generally pretty mild on oil - but this car is very much a short tripper

Re: Magnatec 10w40 after 9500 kms [Re: Matt97] #4700414
03/20/18 06:42 AM
03/20/18 06:42 AM
Joined: Jun 2011
Posts: 7,210
Mahzurrah!
KCJeep Offline
KCJeep  Offline
Joined: Jun 2011
Posts: 7,210
Mahzurrah!
Depends on the engine and use I guess. I have Magnatec in my Lincoln right now, second OCI of it. It's at over 8k miles and is dark honey colored and nothing seems odd about the consistency. But that vehicle is driven a lot, with a lot of highway commute miles, and the engine is clean.

That's the full syn 5w30 though so not exactly the same oil as the OP's either.


2018 VW Passat GT VR6 - 3k - Valvoline MST 5w40 - VW OEM filter
2012 KIA Sedona 95k - PP HM 10w30
2009 Ford Focus 133k - Supertech FS HM 5w30
2004 Jeep Grand Cherokee, gone but not forgotten.

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