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frontpagejongasse posted Today 01:31 PM
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  1. Deal Image
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Item 1 of 2
frontpagejongasse posted Today 01:31 PM

Costco Members: 4-Pk 5-Qt Kirkland Signature Full Synthetic Motor Oil (various)

+ Free Shipping

$54 each

$70

Costco Wholesale
81 Comments 11,739 Views
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Deal Details
Costco Wholesale has for its Members: 4-Pack 5-Quart Kirkland Signature Full Synthetic Motor Oil (various) for $53.99 each. Shipping is free.

Thanks to community member jongasse for sharing this deal.

Note, Non-Members may purchase but are subject to a 5% surcharge

Available Options:

Editor's Notes

Written by slickdewmaster | Staff
  • About this Offer:
    • This sale price matches this very popular FrontPage Deal which received over 360 Thumbs Up from the community.
    • $16 manufacturer's savings is valid 8/28/25 through 9/21/25 or while supplies last. Limit 5 per member.
  • Reviews:
    • Highly rated receiving 4.8 Stars out of 5 Stars based on over 2990 Customer Reviews.
  • If you don't have a Costco Warehouse Membership, you can sign-up here

Original Post

Written by jongasse
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for its Members: 4-Pack 5-Quart Kirkland Signature Full Synthetic Motor Oil (various) for $53.99 each. Shipping is free.

Thanks to community member jongasse for sharing this deal.

Note, Non-Members may purchase but are subject to a 5% surcharge

Available Options:

Editor's Notes

Written by slickdewmaster | Staff
  • About this Offer:
    • This sale price matches this very popular FrontPage Deal which received over 360 Thumbs Up from the community.
    • $16 manufacturer's savings is valid 8/28/25 through 9/21/25 or while supplies last. Limit 5 per member.
  • Reviews:
    • Highly rated receiving 4.8 Stars out of 5 Stars based on over 2990 Customer Reviews.
  • If you don't have a Costco Warehouse Membership, you can sign-up here

Original Post

Written by jongasse

Community Voting

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Top Comments

jackbauer24
6161 Posts
740 Reputation
Buy now or regret later, and besides oil doesn't have an expiration date, and you can also return at the store if you decided if you don't need it. Buy now or regret later.
geekwithoutacause
4128 Posts
300 Reputation
synthetics is closer to 10, easily.Store it normally and will be fine.
rczrider
2629 Posts
911 Reputation
The shelf life of unopened, full synthetic oil is long enough to considered "forever".It's far more likely a person with 5+ jugs of unopened oil, who only changes oil yearly, will trade up to an EV and have no use for the oil rather than having to toss it because it's "bad".

80 Comments

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Today 01:41 PM
3,401 Posts
Joined Nov 2012
Hogan773Today 01:41 PM
3,401 Posts
great deal. so this was out there before at this price?

gotta decide whether really need to pounce now as I only change oil once a year and already have several other jugs "in inventory" in the garage
2
Today 01:43 PM
42 Posts
Joined Feb 2015

This comment has been rated as unhelpful by Slickdeals users.

Today 01:47 PM
3,401 Posts
Joined Nov 2012
Hogan773Today 01:47 PM
3,401 Posts
Quote from Wierts :
Oil has a shelf life. Use what you've got and then replenish supply.
yeah makes sense. and most likely there will be a similar deal next year or 18 months out or whenever I need to resupply. or heaven forbid I have to pay an extra 3 dollars haha slickdeals brain is something that I need to push back on sometimes!
1
1
1
Pro
Today 01:48 PM
6,161 Posts
Joined Jun 2007
jackbauer24
Pro
Today 01:48 PM
6,161 Posts
Quote from Hogan773 :
great deal. so this was out there before at this price?

gotta decide whether really need to pounce now as I only change oil once a year and already have several other jugs "in inventory" in the garage

Buy now or regret later, and besides oil doesn't have an expiration date, and you can also return at the store if you decided if you don't need it. Buy now or regret later.
1
Pro
Today 01:49 PM
3,838 Posts
Joined Jan 2016
Soopersoak
Pro
Today 01:49 PM
3,838 Posts
Kirkland Signature 5-Quart 0W20 & 5W30 Full Synthetic Motor Oil, 4-pack - https://www.costco.com/kirkland-s...91506.html
Today 01:49 PM
3,401 Posts
Joined Nov 2012
Hogan773Today 01:49 PM
3,401 Posts
Quote from jackbauer24 :
Buy now or regret later, and besides oil doesn't have an expiration date, and you can also return at the store if you decided if you don't need it. Buy now or regret later.
now that is Slickdeals brain for sure!
6
Pro
Today 01:50 PM
6,161 Posts
Joined Jun 2007
jackbauer24
Pro
Today 01:50 PM
6,161 Posts
Quote from Wierts :
Oil has a shelf life. Use what you've got and then replenish supply.

How long is the oil shelf life? As long as it is still in the sealed container.

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Today 01:50 PM
232 Posts
Joined Apr 2020
jAyJr1105Today 01:50 PM
232 Posts
Quote from Wierts :
Oil has a shelf life. Use what you've got and then replenish supply.
Please point us to the lab results that says oil degrades sitting on the shelf.
2
Today 01:51 PM
4,128 Posts
Joined Jul 2005
geekwithoutacauseToday 01:51 PM
4,128 Posts
Quote from jackbauer24 :
How long is the oil shelf life? As long as it is still in the sealed container.
much longer than what you will need to store it for. Don't worry about it.
Today 01:53 PM
42 Posts
Joined Feb 2015

This comment has been rated as unhelpful by Slickdeals users.

Today 01:54 PM
498 Posts
Joined Dec 2009
LekzToday 01:54 PM
498 Posts
Quote from Wierts :
Oil has a shelf life. Use what you've got and then replenish supply.
yeah, a shelf life of a couple million years(synth motor oil has a shelf life of ~5 years and so do the additives in it while sealed in bottle)
Today 01:56 PM
4,128 Posts
Joined Jul 2005
geekwithoutacauseToday 01:56 PM
4,128 Posts
Quote from Lekz :
yeah, a shelf life of a couple million years(synth motor oil has a shelf life of ~5 years and so do the additives in it while sealed in bottle)
synthetics is closer to 10, easily.Store it normally and will be fine.
Today 01:56 PM
42 Posts
Joined Feb 2015

This comment has been rated as unhelpful by Slickdeals users.

Today 01:56 PM
39 Posts
Joined Nov 2014
Kevinnn90Today 01:56 PM
39 Posts
Is this deal also available in store?

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Today 01:58 PM
2,629 Posts
Joined Jun 2014
rczriderToday 01:58 PM
2,629 Posts
Quote from Wierts :
Quote from Hogan773 [IMG]https://api-web.slickdeals.net/images/misc/backlink.gif[/IMG] :
great deal. so this was out there before at this price?

gotta decide whether really need to pounce now as I only change oil once a year and already have several other jugs "in inventory" in the garage

Oil has a shelf life. Use what you've got and then replenish supply.
The shelf life of unopened, full synthetic oil is long enough to considered "forever".It's far more likely a person with 5+ jugs of unopened oil, who only changes oil yearly, will trade up to an EV and have no use for the oil rather than having to toss it because it's "bad".

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