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Using old new oil #4758684
05/16/18 10:10 AM
05/16/18 10:10 AM
Joined: Apr 2015
Posts: 185
Canada
Broo Offline OP
Broo  Offline OP
Joined: Apr 2015
Posts: 185
Canada
While cleaning stuff in the basement, I found 6 liters of 20W50 oil lying around. They are unopened bottles of conventional Castrol GTX with a red cap which are probably about 15 years old since they were meant for a car I don't have anymore.

Instead of bringing them to the recycling center this way and therefore wasting them, I checked the manuals and the oldest car in my fleet could use it in hot temperatures.

For the time of the year that I use this car, I'm just under or at the very beginning of the 20w50 temp range.

I also have some Marvel Mystery Oil I normally use for my small engines. According to Marvel's FAQ, using 20% MMO in the crankcase lowers the oil rating by about 4 points, making it ~16W46.

I must also say that this car usually get 10W30 high mileage oil. It doesn't burn any that I ever noticed, but seeps a little in two spots. Would using this cocktail make it worse ?

What do you think of this plan ?

Should I just stick to straight 20W50 ?

20W50 with a high mileage additive ?

20W50 with both MMO and HM add ?

Not use it at all ?

Re: Using old new oil [Re: Broo] #4758692
05/16/18 10:18 AM
05/16/18 10:18 AM
Joined: Oct 2009
Posts: 388
California
Billbert Offline
Billbert  Offline
Joined: Oct 2009
Posts: 388
California
What is the API rating of the oil vs your cars requirement?


If you think you can, or if you think you can't, You are probably right.

Auto Instructor / ASE Master Tech
Re: Using old new oil [Re: Broo] #4758694
05/16/18 10:19 AM
05/16/18 10:19 AM
Joined: Oct 2004
Posts: 3,214
Midwest, Illinois
beanoil Offline
beanoil  Offline
Joined: Oct 2004
Posts: 3,214
Midwest, Illinois
Just run it straight in the car the manual says it can be run in.


beanoil: Tough under heat, real dirty afterwards.
Re: Using old new oil [Re: Broo] #4758695
05/16/18 10:20 AM
05/16/18 10:20 AM
Joined: Jan 2009
Posts: 853
PA
ridgerunner Offline
ridgerunner  Offline
Joined: Jan 2009
Posts: 853
PA
Use it for your lawn mower or chainsaw lube

Re: Using old new oil [Re: Broo] #4758700
05/16/18 10:26 AM
05/16/18 10:26 AM
Joined: Jun 2016
Posts: 3,566
MN
oil_film_movies Offline
oil_film_movies  Offline
Joined: Jun 2016
Posts: 3,566
MN
Use it, shake those bottles well since some additives in there will settle to the bottom.
Use a half-dose of HM additive with the 20w50 for the hot months. I'd skip the MMO. ... In that Tercel or Supra

Re: Using old new oil [Re: Broo] #4758712
05/16/18 10:37 AM
05/16/18 10:37 AM
Joined: Nov 2012
Posts: 84
New Jersey, USA
jrtribology Offline
jrtribology  Offline
Joined: Nov 2012
Posts: 84
New Jersey, USA
I have always loved the smell, look, and feel of Castrols conventional base stock product. I guess just as long as it doesn't contain additives that have settled to the bottom of any given brand ...

Re: Using old new oil [Re: Broo] #4758724
05/16/18 10:52 AM
05/16/18 10:52 AM
Joined: Apr 2018
Posts: 619
Canada
nap Offline
nap  Offline
Joined: Apr 2018
Posts: 619
Canada
Looks like a good time to dilute that stock with alcohol and sell it as “Eau de Castrol” laugh

Re: Using old new oil [Re: Broo] #4758730
05/16/18 10:56 AM
05/16/18 10:56 AM
Joined: Feb 2013
Posts: 11,198
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline
Joined: Feb 2013
Posts: 11,198
Phoenix, AZ
I'd get some 5w20 Castrol GTX to mix it with.


2015 Hyundai Sonata 2.4L 90k Motorcraft Synthetic Blend 5w30 & OEM
2000 Toyota Camry 2.2L 232k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 148k Mobil 1 HM 10w40 & Fram Ultra
Re: Using old new oil [Re: Broo] #4758731
05/16/18 10:56 AM
05/16/18 10:56 AM
Joined: Oct 2012
Posts: 1,265
Rabbit Creek, Alaska
jayg Offline
jayg  Offline
Joined: Oct 2012
Posts: 1,265
Rabbit Creek, Alaska
I'm using 45 year old oil in my 240z and have for 6 years. Stored properly and meeting the spec of the engine it's going in, it will be fine.


2018 Ford Ecosport AWD- Napa 0w20
2017 Ram 1500 Ecodiesel- CP Triton ECT 5w40
1973 Datsun 240Z 10w30- VWC from '73
1973 Triumph Bonneville 750- M1 5w50
1967 BSA 441 Victor Special- M1 5w50




Re: Using old new oil [Re: Billbert] #4758743
05/16/18 11:13 AM
05/16/18 11:13 AM
Joined: Apr 2015
Posts: 185
Canada
Broo Offline OP
Broo  Offline OP
Joined: Apr 2015
Posts: 185
Canada
Originally Posted By: Billbert
What is the API rating of the oil vs your cars requirement?


Good call, I'll check it out when I'm back home.

Re: Using old new oil [Re: Broo] #4758755
05/16/18 11:26 AM
05/16/18 11:26 AM
Joined: Sep 2008
Posts: 9,240
Ontario, Canada
IndyIan Offline
IndyIan  Offline
Joined: Sep 2008
Posts: 9,240
Ontario, Canada
The tercel and the supra would probably handle it OK, but you have to watch higher revs when the oil is cold as it may not drain back from the head as fast as its pumped up there. Partially sludged drain back holes won't help things.
You should do a before and after 0-60 test on the Tercel. I think it will be significantly slower with the 20W50.


07 Focus ZXW, 5spd manual, 218km M1 5W30
18 Outback 2.5 CVT 15km 0W20
Re: Using old new oil [Re: IndyIan] #4758759
05/16/18 11:28 AM
05/16/18 11:28 AM
Joined: Apr 2015
Posts: 185
Canada
Broo Offline OP
Broo  Offline OP
Joined: Apr 2015
Posts: 185
Canada
Originally Posted By: IndyIan
You should do a before and after 0-60 test on the Tercel. I think it will be significantly slower with the 20W50.


I don't think it can be any slower unless it's broken down. We're talking 23-25 seconds 0-60 here.

There's no way I'll use this oil in my Supra, even though the manual says I could.

Re: Using old new oil [Re: Broo] #4758800
05/16/18 11:59 AM
05/16/18 11:59 AM
Joined: Jan 2017
Posts: 2,217
VW Fanboy Island
maxdustington Offline
maxdustington  Offline
Joined: Jan 2017
Posts: 2,217
VW Fanboy Island
1. Send some of it for a VOA
2. I am sure someone would pay shipping or pick it up locally. Vintage 20W50 for BITOG hipsters! EDIT: Where do you live in Canada?

Last edited by maxdustington; 05/16/18 12:01 PM.

03 Jetta AWP/09A 205k kms
Edge 0W40 + Mann 719/30
Re: Using old new oil [Re: Nick1994] #4758877
05/16/18 01:41 PM
05/16/18 01:41 PM
Joined: Aug 2012
Posts: 169
Central Florida
StevieBoy Offline
StevieBoy  Offline
Joined: Aug 2012
Posts: 169
Central Florida
Originally Posted By: Nick1994
I'd get some 5w20 Castrol GTX to mix it with.
+1 Me Too! 50/50

Last edited by StevieBoy; 05/16/18 01:48 PM.

2018 Grand Cherokee Limited
25th Anniversary Sterling Edition
Re: Using old new oil [Re: Broo] #4758914
05/16/18 02:35 PM
05/16/18 02:35 PM
Joined: Nov 2008
Posts: 3,379
Oshawa, Ontario Canada
JC1 Offline
JC1  Offline
Joined: Nov 2008
Posts: 3,379
Oshawa, Ontario Canada
I had an 84 Tercel and I think the crankcase held 4 quarts for an oil change. I'd use 3 qts of the 20w-50 and mix in a quart of 5w-30.


2015 Grand Caravan SXT Plus 5w-20 Valvoline SynPower/Fram Ultra Filter
1997 Honda Civic CX 5w-30 PPPP/Fram Ultra Filter
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