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mixing synthetic and non-synthetic oil #4498790
08/26/17 03:55 PM
08/26/17 03:55 PM
Joined: Aug 2017
Posts: 1
Baltimore County
bella1 Offline OP
bella1  Offline OP
Joined: Aug 2017
Posts: 1
Baltimore County
my 2008 toyota tacoma calls for 6.3 quarts of 0W-20 oil. I added a 5 qt container of 0W-20 synthetic blend, and then topped off with 1 qt of 5-W20 conventional oil. Is that okay to mix?

Re: mixing synthetic and non-synthetic oil [Re: bella1] #4498797
08/26/17 03:59 PM
08/26/17 03:59 PM
Joined: Sep 2005
Posts: 5,688
MIchigan
Warstud Offline
Warstud  Offline
Joined: Sep 2005
Posts: 5,688
MIchigan
Perfectly fine. That synthetic blend is mostly conventional anyway. You just diluted it even more.

Re: mixing synthetic and non-synthetic oil [Re: bella1] #4498798
08/26/17 04:00 PM
08/26/17 04:00 PM
Joined: Sep 2016
Posts: 1,418
Minnesota
bioburner Offline
bioburner  Offline
Joined: Sep 2016
Posts: 1,418
Minnesota
You just added more non synthetic to the already low amount of synthetic of the blend. No problem
Warstud beat me

Last edited by bioburner; 08/26/17 04:01 PM.


97 Ford E350 D,99 F350 dually D
13 Scion Xb
12 Ford Transit Connect
06 Nissan Xterra
03 K1200 BMW
07 Kawasaki KLR650
13 Madass
Re: mixing synthetic and non-synthetic oil [Re: bella1] #4498808
08/26/17 04:20 PM
08/26/17 04:20 PM
Joined: Oct 2014
Posts: 11,864
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,864
Idaho
Why ask? Just curious.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: mixing synthetic and non-synthetic oil [Re: bella1] #4498809
08/26/17 04:22 PM
08/26/17 04:22 PM
Joined: Jul 2015
Posts: 3,772
MD
AirgunSavant Offline
AirgunSavant  Offline
Joined: Jul 2015
Posts: 3,772
MD
Pennzoil now addresses this on their website.

Re: mixing synthetic and non-synthetic oil [Re: bella1] #4498819
08/26/17 04:40 PM
08/26/17 04:40 PM
Joined: Jul 2017
Posts: 542
Texas (south)
FermeLaPorte Offline
FermeLaPorte  Offline
Joined: Jul 2017
Posts: 542
Texas (south)
The mix is ok. It is mostly 0w20 so no problem there. Had it been something like diesel motor oil 5w40 and then 0w20, well, it would be a different story


Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.
Re: mixing synthetic and non-synthetic oil [Re: CT8] #4498845
08/26/17 05:24 PM
08/26/17 05:24 PM
Joined: Jun 2015
Posts: 4,225
New England
Virtus_Probi Offline
Virtus_Probi  Offline
Joined: Jun 2015
Posts: 4,225
New England
Originally Posted By: CT8
Why ask? Just curious.


Lots of FUD about mixing the two has been spread around...I had a guy at a Midas tell me that I could never go back to using conventional if I switched to synthetic in my RAV4. He gave me a bit of a shock but I guessed that he was probably full of it, and I was right.
The very existence of synthetic blends tells us that mixing the two is OK.


2014 Forester XT, 86000 miles
Last Change;
M1 5W30 d1G2
Tokyo Roki 15208AA170 filter
Re: mixing synthetic and non-synthetic oil [Re: bella1] #4498851
08/26/17 05:35 PM
08/26/17 05:35 PM
Joined: Jun 2014
Posts: 2,475
Phoenix, Arizona - USA
SirTanon Offline
SirTanon  Offline
Joined: Jun 2014
Posts: 2,475
Phoenix, Arizona - USA
I do this all the time.. sometimes I mix conventional with synblend, sometimes I mix conventional with full synthetic, and sometimes I mix syn blend with synthetic..

.. heck, I've even mixed "high-mileage" with conventional, syn-blend, or synthetic.

Never had what I felt was a bad UOA using any of these.

For what it's worth, this UOA below was (I think) a mix of Castrol Synblend, Valvoline NextGen Maxlife, and Valvoline NextGen conventional... some was 5w30 and some was 5w20.. as you can see, the results were just fine:



2010 Ford Fusion SE - 2.5 liter/6F35 Trans - 262,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 57,000mi
Re: mixing synthetic and non-synthetic oil [Re: bella1] #4498977
08/26/17 09:16 PM
08/26/17 09:16 PM
Joined: Aug 2004
Posts: 4,646
Katy, Republic of Texas
blupupher Offline
blupupher  Offline
Joined: Aug 2004
Posts: 4,646
Katy, Republic of Texas
Many "conventional" oils are a blend anyway, so no harm done.
The cost of "syn blend" (how much syn, nobody is telling) is not justified for what you get.

No harm done, no real benefit either.

I have mixed blends, conventional and synthetic. It is oil in my engine, that is what matters most.


2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
1994 Honda VT1100: Peak 15w-40/PSL/2500 mile OCI

Re: mixing synthetic and non-synthetic oil [Re: bella1] #4499284
08/27/17 09:41 AM
08/27/17 09:41 AM
Joined: Oct 2015
Posts: 2,660
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline
Joined: Oct 2015
Posts: 2,660
Balearic Islands , Spain
No problem at all.


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.

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