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


Registered: 04/11/15
Posts: 106
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 ?
_________________________
2006 Ford Ranger 3.0L V6 5AT
2005 Toyota Echo 1.5L I4 5MT
2004 Toyota Sienna 3.3L V6 5AT
1984 Toyota Supra 2.8L I6 5MT
1981 Toyota Tercel 1.5L I4 3AT

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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: 353
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: 2930
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 Online   content


Registered: 01/14/09
Posts: 764
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: 2432
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 Online   content


Registered: 04/27/18
Posts: 235
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: 9992
Loc: Phoenix, AZ
I'd get some 5w20 Castrol GTX to mix it with.
_________________________
2015 Hyundai Sonata 2.4L 77k PU 5w30 & OEM
2000 Toyota Camry 2.2L 228k M1 AFE 0w30 & Wix
1996 Jeep Cherokee 4.0L 145k M1 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: 1191
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.
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‘17 Ram 1500 Ecodiesel 5w40 Rotella T6
'15 Prius C Napa Full Syn 0w20
'87 Land Cruiser 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: 106
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.
_________________________
2006 Ford Ranger 3.0L V6 5AT
2005 Toyota Echo 1.5L I4 5MT
2004 Toyota Sienna 3.3L V6 5AT
1984 Toyota Supra 2.8L I6 5MT
1981 Toyota Tercel 1.5L I4 3AT

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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: 9041
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.
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07 Focus ZXW, 5spd manual, 206km M1 5W30
18 Outback 2.5 CVT 5km FF

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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: 106
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.
_________________________
2006 Ford Ranger 3.0L V6 5AT
2005 Toyota Echo 1.5L I4 5MT
2004 Toyota Sienna 3.3L V6 5AT
1984 Toyota Supra 2.8L I6 5MT
1981 Toyota Tercel 1.5L I4 3AT

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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: 406
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)
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03 Jetta AWP/09A 200k kms
TGMO 0W20 "Legend" & Hella Magnet Filter

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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: 158
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)
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2018 Grand Cherokee Limited
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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: 2899
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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