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frontpagemg3 posted Apr 06, 2026 10:31 AM
frontpagemg3 posted Apr 06, 2026 10:31 AM

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

+ Free S&H

$54 each

$70

Costco Wholesale
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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 mg3 for sharing this deal.

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

Available:

Editor's Notes

Written by qwikwit | Staff
  • The sale is valid 4/6/26 through 5/3/26. While supplies last. Limit 5 per member.
  • This offer matches the previous and popular Frontpage Deal from August 2025, which received +203 community votes.
  • If you don't have a Costco Warehouse Membership, you can sign-up here

Original Post

Written by mg3
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 mg3 for sharing this deal.

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

Available:

Editor's Notes

Written by qwikwit | Staff
  • The sale is valid 4/6/26 through 5/3/26. While supplies last. Limit 5 per member.
  • This offer matches the previous and popular Frontpage Deal from August 2025, which received +203 community votes.
  • If you don't have a Costco Warehouse Membership, you can sign-up here

Original Post

Written by mg3

Community Voting

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+304
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Top Comments

hmrambling
3593 Posts
2593 Reputation
Click on the warehouse on the bottom of your app. Then click that you want to shop your warehouse.

I'm able to easily see that my warehouse doesn't carry most weights and that I'd need to order it online.
mg3
535 Posts
346 Reputation
It's warren oil, the same people who make supertech. I'm thinking if you are changing every 5000 miles (especially given that it's so cheap to do so with this), it'll be no issues. But obviously, ymmv
Janerl
571 Posts
513 Reputation
Interestingly, from I can see, it's $30 for 2x 5qt in-store so online is actually cheaper. I really like that the Costco app lets you check in-store inventory and prices now.

294 Comments

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Apr 06, 2026 06:53 PM
1,255 Posts
Joined Sep 2022
TealIdea227Apr 06, 2026 06:53 PM
1,255 Posts
Quote from DealHunterNYC212 :
Is this also good for lawn mowers and power washers? 10-30 is recommended but ChatGPT says I can use 5-30 oil
It will probably never make a difference in the real world, but the distinction between modern 5W-30 and 10W-30 in an air-cooled engine is HTHS viscosity ... maybe (depends on the oil.) I use Rotella 15W40 in a Kawasaki FH541V.
Pro
Apr 06, 2026 07:02 PM
3,146 Posts
Joined Sep 2011
E4300
Pro
Apr 06, 2026 07:02 PM
3,146 Posts
Quote from nottrollin :
You can change it whenever you want. I'm not going spend $40 to "test" my oil only to find out I need to change my oil.
I recently adjusted my valves on my 15 year old Honda and the vallve train looked great inside, with no varnish, deposits or sludge. That's what I wanted out of 5K OCI. And I have the peace of mind knowing it'll easily last another 100K miles, for me or the next owner.

For $600 in oil changes over 15 years, that was money well spent, IMO.

As a Slickdealer, I was getting the oil "Free After Rebate" for the majority of that time, so I didn't actually even spend $600. It was Free, just the cost of filters.


I've seen plenty of engines after 10K OCI and they usually look like crap inside once they get over the 100K mark, (ie out of warranty) .
5K Toyota OCI light was the norm for decades. Then the German came out with 10K to 15K OCI. So Toyota had to bump up the OCI to 10K to maintain the "lower cost of operation" theme. Only have to last past warranty period, right? Unfortunately, thin oil, marginal electric oil pump pressure, high load turbo, direct injection, reduced bearing surface area, and weaker block design killed the Toyota V35A.

New replacement V35A engine still blow up after 6000 miles.

https://www.youtube.com/watch?v=ChdjfKHueLg

https://www.youtube.com/watch?v=1-_v6S6P5Ec
2
Pro
Apr 06, 2026 07:02 PM
2,849 Posts
Joined Dec 2008
Marlin1975
Pro
Apr 06, 2026 07:02 PM
2,849 Posts
Quote from ConsumerAdvoCat :
Do they oil for older or high mileage cars?


Yep this one...

https://www.costco.com/p/-/kirkla...4000405607
Apr 06, 2026 07:11 PM
2,981 Posts
Joined May 2018
TimlessApr 06, 2026 07:11 PM
2,981 Posts
Quote from nottrollin :
You can change it whenever you want. I'm not going spend $40 to "test" my oil only to find out I need to change my oil.
I recently adjusted my valves on my 15 year old Honda and the vallve train looked great inside, with no varnish, deposits or sludge. That's what I wanted out of 5K OCI. And I have the peace of mind knowing it'll easily last another 100K miles, for me or the next owner.

For $600 in oil changes over 15 years, that was money well spent, IMO.

As a Slickdealer, I was getting the oil "Free After Rebate" for the majority of that time, so I didn't actually even spend $600. It was Free, just the cost of filters.


I've seen plenty of engines after 10K OCI and they usually look like crap inside once they get over the 100K mark, (ie out of warranty) .
Toyota and Honda warranty is only 60k
Apr 06, 2026 07:12 PM
4,245 Posts
Joined Jul 2006
budsterApr 06, 2026 07:12 PM
4,245 Posts
Didn't they used to recently sell the 2 pack of 5 qt jugs online? Only see the 4 pack now. Anyone know if they still sell the 2 pack in-store and if so, what's the sale price?
Apr 06, 2026 07:12 PM
2,981 Posts
Joined May 2018
TimlessApr 06, 2026 07:12 PM
2,981 Posts
Quote from E4300 :

5K Toyota OCI light was the norm for decades. Then the German came out with 10K to 15K OCI. So Toyota had to bump up the OCI to 10K to maintain the "lower cost of operation" theme. Only have to last past warranty period, right? Unfortunately, thin oil, marginal electric oil pump pressure, high load turbo, direct injection, reduced bearing surface area, and weaker block design killed the Toyota V35A.

New replacement V35A engine still blow up after 6000 miles.

https://www.youtube.com/watch?v=ChdjfKHueLg

https://www.youtube.com/watch?v=1-_v6S6P5Ec
So 5k oil cahnges will save the V35A?
1
Pro
Apr 06, 2026 07:21 PM
3,146 Posts
Joined Sep 2011
E4300
Pro
Apr 06, 2026 07:21 PM
3,146 Posts
Quote from Timless :
So 5k oil cahnges will save the V35A?
No. Multiple failures, per my previous post. Toyota uses machining contaminants to limit liability. Why not include those same V35As found on hybrid in the recall?

Higher viscosity oil will buy a little more time before failure. That's the GM strategy to get out of warranty repair.
1

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Apr 06, 2026 07:25 PM
175 Posts
Joined Jan 2015
F3lix3Apr 06, 2026 07:25 PM
175 Posts
Great deal in for 1!!!!!
Apr 06, 2026 07:28 PM
2,981 Posts
Joined May 2018
TimlessApr 06, 2026 07:28 PM
2,981 Posts
Quote from E4300 :

No. Multiple failures, per my previous post. Toyota uses machining contaminants to limit liability. Why not include those same V35As found on hybrid in the recall?

Higher viscosity oil will buy a little more time before failure. That's the GM strategy to get out of warranty repair.
So basically actual design issue and best to avoid the current V35A.
Pro
Apr 06, 2026 07:29 PM
253 Posts
Joined Sep 2016
StevePGH
Pro
Apr 06, 2026 07:29 PM
253 Posts
in for a case of 4 and a smaller case of 12 for oil changes on my new F150. Just bought some ramps to start doing my oil changes.
1
Pro
Apr 06, 2026 07:30 PM
253 Posts
Joined Sep 2016
StevePGH
Pro
Apr 06, 2026 07:30 PM
253 Posts
duplicate.
Apr 06, 2026 07:37 PM
4,653 Posts
Joined Jan 2007

This comment has been rated as unhelpful by Slickdeals users.

Apr 06, 2026 07:49 PM
125 Posts
Joined Oct 2014
TeamInflationFighterApr 06, 2026 07:49 PM
125 Posts
how does this compare in quality to Mobil 1 fully synthetic?
Apr 06, 2026 07:49 PM
693 Posts
Joined Jul 2005
mychaluvaApr 06, 2026 07:49 PM
693 Posts
Picked this up last time, but haven't used enough to restock yet. Bummer... great deal. Hopefully I'll catch it next time.

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Apr 06, 2026 07:50 PM
62 Posts
Joined Sep 2015
alex_k16Apr 06, 2026 07:50 PM
62 Posts
Quote from Ilovedeals :
Annoyed toyota says i should use 0w-16 for my car because it isnt very common and can't grab deals like this
walmart has it 0w16 good price

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