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#4595208 - 12/05/17 03:52 PM Shelf life of motor oils???
anotheroldguy Offline

Registered: 12/04/17
Posts: 6
Loc: Florida
Hi Guys,
I am a newbie on this forum, so please be gentle...

A few days ago, I sent this email to Shell/Pennzoil Motor Oil:

"About six years ago, I moved, and apparently, I misplaced 5 one quart bottles of Platinum Full Synthetic SAE 5 W 30 motor oil. I just found them a couple of days ago. Very soon I will be due for my next oil change on my "Pride and Joy". Since this particular car has an eight quart capacity crankcase, I am 3 quarts short. My question to you is if I could safely mix or combine this "old" oil with three quarts of "new" oil. I remember reading somewhere that now Pennzoil synthetizes their oil from natural gas rather than from conventional oil stocks. I have no idea what the synthesis procedure was six years ago. I just want to make sure that this "two different oils" are miscible with one another and that I WILL NOT harm my engine."
The answer was short and sweet, somewhere along the lines of: Pennzoil Motor Oil has a shelf life of four years.We recommend you dump this oil and buy new one.

What do you guys think? Can I still safely use it or not? We are talking retail price of about $40.00 to just simply "Dump".

Thanks for your help.

#4595211 - 12/05/17 03:54 PM Re: Shelf life of motor oils??? [Re: anotheroldguy]
Vladiator Offline

Registered: 01/04/16
Posts: 722
Loc: NC
You can safely use it. Pennzoil only tells you what their lawyers want them to tell you. Reality is - you are perfectly safe. Use it with confidence.
Privet Slavyanam!

#4595218 - 12/05/17 03:59 PM Re: Shelf life of motor oils??? [Re: anotheroldguy]
StevieC Offline

Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
welcome to BITOG!

Go ahead and use it. It's fine.
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

#4595225 - 12/05/17 04:05 PM Re: Shelf life of motor oils??? [Re: anotheroldguy]
PimTac Offline

Registered: 03/04/17
Posts: 3490
Loc: Soviet State of Washington
GIve it a good shake before opening. What is your “Pride and Joy”?
2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter

#4595231 - 12/05/17 04:10 PM Re: Shelf life of motor oils??? [Re: anotheroldguy]
OneEyeJack Offline

Registered: 09/14/10
Posts: 7402
Loc: S California
You might want to be aware of the oil spec. And older spec oil would not be appropriate for some modern engines.

In a worst case, there's always the lawn mower. The oil won't go bad just sitting there and as PimTac suggested, give it a good shake.

#4595238 - 12/05/17 04:25 PM Re: Shelf life of motor oils??? [Re: anotheroldguy]
JohnnyJohnson Offline

Registered: 10/22/09
Posts: 2394
Loc: Wet side WA
Shelf life is likely longer than you're going to live!
2004 Toyota Corolla 119727
Out: QSUD 5W-30 Purolator One 5030
In: Valvoline ML 5w-30 TG4967 117530 2-8-18
2006 Duramax 73752
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73752 4-22-18

#4595243 - 12/05/17 04:39 PM Re: Shelf life of motor oils??? [Re: anotheroldguy]
sir1900 Offline

Registered: 03/12/09
Posts: 1565
Loc: Regina, Saskatchewan
Assuming it meets your vehicle's specs, then yes, go ahead and use it.

Welcome to BITOG. I think you'll like it here.
2015 Infiniti Q50
PPPP 5W-30 + Baldwin B1402

2015 Nissan Murano
Mobil1 AFE 0W-20 + FRAM XG6607

#4595244 - 12/05/17 04:43 PM Re: Shelf life of motor oils??? [Re: anotheroldguy]
Chris142 Offline

Registered: 06/05/03
Posts: 16534
Loc: Deplorable in apple valley, ca
Look at how long oils sit and are used in the car. I am sure that there are 50s and 60s cars that still have their original oils in the axles and trans etc... a few years sitting on your shelf isnt anything.
02 Wrangler super-s 10w30
87 F250 proline 15w40
04 Tahoe super-s 10w30
Z400 Lucas 10w30
KLR250 Maxima 10w40
Can am maveric edge 5w40
57 case tractor 15w40

#4595262 - 12/05/17 05:15 PM Re: Shelf life of motor oils??? [Re: anotheroldguy]
NormanBuntz Offline

Registered: 07/27/13
Posts: 2020
Loc: Outer Banks, NC
Any Pennzoil employee telling you that its synthetic oil has a four year shelf life is a nitwit. Make sure it has the right API rating for your vehicle, and give it a good shake before pouring.
"What is it, the first hole I dug?"
2017 Honda Odyssey SE
2013 Honda Accord LX
2007 Honda Ridgeline RTS
2007 Infiniti M35

#4595263 - 12/05/17 05:17 PM Re: Shelf life of motor oils??? [Re: anotheroldguy]
SilverSnake Offline

Registered: 05/29/13
Posts: 571
Loc: Florida
There are many BITOG members who will tell you to use oil in sealed containers regardless of age. They tend not to believe anything the oil companies say. Everything the oil companies say or do is a conspiracy to sell you more oil. The same members will also tell you that getting the maximum number of miles or the most time out of an oil change is paramount. They would have you spend all your oil change money on UOAs to prove that old oil is still good. Some of these members will also tell you that 50 year oil in the crankcase of a barn find is perfectly good. IMO if you care about your vehicle, give the old oil to one of the members I mentioned above and buy some new oil for your car.

Edited by SilverSnake (12/05/17 05:18 PM)
2016 Charger, 6.4L-485 HP (PUP 0W-40)
2017 BMW 330i, 2L-248 HP (BMW 0W-20)
2018 Jeep GC, 3.6L-295 HP (PUP 0W-20)
2008 20KW Generac (Amsoil 10W-30/30)

#4595276 - 12/05/17 05:34 PM Re: Shelf life of motor oils??? [Re: anotheroldguy]
Artem Offline

Registered: 10/30/10
Posts: 5086
Loc: Florida
Send a sample for analysis, just for kicks and giggles.

If it was a beater, I wouldn't hesitate. But for a "pride and joy" automobile... I'd buy new Lube.
2014 Mazda 3 Hatch 2.0L & 6spd - Idemitsu 0w20 Synthetic @ $0.75 a quart.

#4595293 - 12/05/17 05:50 PM Re: Shelf life of motor oils??? [Re: anotheroldguy]
K23Turbo Offline

Registered: 02/05/09
Posts: 222
Loc: Pennsylvania
Use every last drop of your old stock. Mix away.

#4595295 - 12/05/17 05:51 PM Re: Shelf life of motor oils??? [Re: anotheroldguy]
blupupher Offline

Registered: 08/27/04
Posts: 4335
Loc: Katy, Republic of Texas
Sealed bottle stored inside (not exposed to severe temp extreme cycles), I would use it so long as it met the vehicle spec.

Last year I had some Pennzoil Platinum (Pre GTL) made in 2009 that I used in my car. I had no worries about using it.
No, I did not do a VOA or UOA on it. I had no question about it.
I have a stash of oil that will be almost as old or older when I finally use it, not concerned one bit.

I remember some place did some VOA and UOA on oil that had been sitting on the shelf for 30 years and it was fine.
I think Valvoline says a 5 year shelf life.

It is a sue happy world, and they are only covering their rear ends.
1994 Honda VT1100C: Peak 15w-40/TG/2500 mile OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI

#4595331 - 12/05/17 06:33 PM Re: Shelf life of motor oils??? [Re: blupupher]
Dallas69 Offline

Registered: 02/11/14
Posts: 1617
Loc: Texas
The worst that can happen is additives may settle to the bottom which is why we shake the bottles.
Shake and pour baby.
2009 Galant-ultra oil and filter
1987 Ford F-150 302
Smittys 5-30
Motorcraft filter

#4595336 - 12/05/17 06:37 PM Re: Shelf life of motor oils??? [Re: anotheroldguy]
johnchui1984 Offline

Registered: 11/14/17
Posts: 45
Loc: Richmond VA, Washington DC
I think if the seal is not broken, the oil is ok to use. Just shake the oil before pouring it into your engine smile
2016 Nissan Versa S-Plus CVT
Castrol Magnatec + Fram Ultra

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