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#4758684 - 05/16/18 11:10 AM Using old new oil
Broo Offline


Registered: 04/11/15
Posts: 150
Loc: 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 ?

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#4758692 - 05/16/18 11:18 AM Re: Using old new oil [Re: Broo]
Billbert Offline


Registered: 10/09/09
Posts: 379
Loc: California
What is the API rating of the oil vs your cars requirement?
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#4758694 - 05/16/18 11:19 AM Re: Using old new oil [Re: Broo]
beanoil Offline


Registered: 10/17/04
Posts: 3045
Loc: Midwest, Illinois
Just run it straight in the car the manual says it can be run in.
_________________________
beanoil: Tough under heat, real dirty afterwards.

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#4758695 - 05/16/18 11:20 AM Re: Using old new oil [Re: Broo]
ridgerunner Offline


Registered: 01/14/09
Posts: 813
Loc: PA
Use it for your lawn mower or chainsaw lube

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#4758700 - 05/16/18 11:26 AM Re: Using old new oil [Re: Broo]
oil_film_movies Offline


Registered: 06/13/16
Posts: 2696
Loc: 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

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#4758712 - 05/16/18 11:37 AM Re: Using old new oil [Re: Broo]
jrtribology Offline


Registered: 11/20/12
Posts: 84
Loc: 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 ...

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#4758724 - 05/16/18 11:52 AM Re: Using old new oil [Re: Broo]
nap Offline


Registered: 04/27/18
Posts: 555
Loc: Canada
Looks like a good time to dilute that stock with alcohol and sell it as “Eau de Castrol” laugh

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#4758730 - 05/16/18 11:56 AM Re: Using old new oil [Re: Broo]
Nick1994 Offline


Registered: 02/19/13
Posts: 10442
Loc: Phoenix, AZ
I'd get some 5w20 Castrol GTX to mix it with.
_________________________
2015 Hyundai Sonata 2.4L 82k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 229k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 146k Mobil 1 HM 10w40 & Fram Ultra

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#4758731 - 05/16/18 11:56 AM Re: Using old new oil [Re: Broo]
jayg Offline


Registered: 10/04/12
Posts: 1211
Loc: 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.
_________________________
‘17 Ram 1500 Ecodiesel- RT6 5w40
'15 Prius C Napa 0w20
'73 240Z 10w30 VWC from '73
'73 Triumph Tiger 750 M1 5w50
'67 BSA 441 Victor Special M1 5w50





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#4758743 - 05/16/18 12:13 PM Re: Using old new oil [Re: Billbert]
Broo Offline


Registered: 04/11/15
Posts: 150
Loc: 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.

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#4758755 - 05/16/18 12:26 PM Re: Using old new oil [Re: Broo]
IndyIan Offline


Registered: 09/23/08
Posts: 9150
Loc: 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, 210km M1 5W30
18 Outback 2.5 CVT 10km 0W20 "bulk subaru" whatever that is

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#4758759 - 05/16/18 12:28 PM Re: Using old new oil [Re: IndyIan]
Broo Offline


Registered: 04/11/15
Posts: 150
Loc: 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.

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#4758800 - 05/16/18 12:59 PM Re: Using old new oil [Re: Broo]
maxdustington Offline


Registered: 01/21/17
Posts: 1014
Loc: Toronna
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?


Edited by maxdustington (05/16/18 01:01 PM)
_________________________
03 Jetta AWP/09A 200k kms
Edge 0W40 + Mann 719/30

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#4758877 - 05/16/18 02:41 PM Re: Using old new oil [Re: Nick1994]
StevieBoy Offline


Registered: 08/06/12
Posts: 169
Loc: Central Florida
Originally Posted By: Nick1994
I'd get some 5w20 Castrol GTX to mix it with.
+1 Me Too! 50/50


Edited by StevieBoy (05/16/18 02:48 PM)
_________________________
2018 Grand Cherokee Limited
25th Anniversary Sterling Edition

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#4758914 - 05/16/18 03:35 PM Re: Using old new oil [Re: Broo]
JC1 Offline


Registered: 11/29/08
Posts: 3106
Loc: 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.
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