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expiredblingkblingk posted Apr 11, 2026 12:22 PM

Costco Members: 12-Pk 1-Qt Kirkland Signature Full Synthetic Motor Oil

$35

$45

22% off
+ Free S&Hat Costco Wholesale
65 Comments
23K Views
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Deal Details
Costco has for their Members: 12-Pk 1-Qt Kirkland Signature Full Synthetic Motor Oil (Various Viscosities) on sale for $34.99. Shipping is free.

Thanks to Community Member blingkblingk for sharing this deal.

Note: See this page for a full list of options. Non-members may purchase but are subject to a 5% surcharge.

Product Details:
  • Advanced Wear Protection
  • For Extended Engine Life
  • Controls Thermal Breakdown

Editor's Notes

Written by Nate650 | Staff
  • About this product:
    • Rated 4.8 out of 5 stars based on over 690 Costco customer reviews.
  • About this store:
    • If you don't have a Costco Warehouse Membership, you can sign up here.
  • Additional notes:
    • Please see the original post for additional details & give the wiki and additional forum comments a read for helpful discussion.

Original Post

Written by blingkblingk
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco has for their Members: 12-Pk 1-Qt Kirkland Signature Full Synthetic Motor Oil (Various Viscosities) on sale for $34.99. Shipping is free.

Thanks to Community Member blingkblingk for sharing this deal.

Note: See this page for a full list of options. Non-members may purchase but are subject to a 5% surcharge.

Product Details:
  • Advanced Wear Protection
  • For Extended Engine Life
  • Controls Thermal Breakdown

Editor's Notes

Written by Nate650 | Staff
  • About this product:
    • Rated 4.8 out of 5 stars based on over 690 Costco customer reviews.
  • About this store:
    • If you don't have a Costco Warehouse Membership, you can sign up here.
  • Additional notes:
    • Please see the original post for additional details & give the wiki and additional forum comments a read for helpful discussion.

Original Post

Written by blingkblingk

Community Voting

Deal Score
+80
Good Deal
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Top Comments

Sreeps
69Comments
14Reputation
I've used this oil for years. I drive vehicles that are usually 10+ years old. Oil is changed at or before 5k miles, or with the seasons (I drive my truck once a week). Never had a problem. I think most oil is probably fine as long as you're changing it. Change your oil people!
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65 Comments

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Apr 11, 2026 8:38 PM
12 Comments
Joined Apr 2019
Kraigg007Apr 11, 2026 8:38 PM
12 Comments
Quote from DealAddict :
Cheaper in store?
No in store, each box is 29.99 on sale so this deal is. Superior. I picked up 3 in the store and just order 2, 2 packs. You can't beat this deal. They even have a pack that is one box 0W-20 and one high mileage 5W-30.
Apr 11, 2026 9:06 PM
535 Comments
Joined Aug 2013
texag09Apr 11, 2026 9:06 PM
535 Comments
Wow, this is an excellent price. At this price you can change the oil twice as often and it'll cost less than one of the fancy oils like Pennzoil or Mobil 1.

I think oil analysis has shown that it's a good oil. As long as you're changing on time, I think any full synthetic you can on the shelf at any major US retailer will be fine, if it's the right viscosity for your vehicle. Unless you have a fancy vehicle or high performance.
Apr 11, 2026 9:30 PM
1.2K Comments
Joined May 2014
peterl1365Apr 11, 2026 9:30 PM
1.2K Comments
Quote from Kraigg007 :
No in store, each box is 29.99 on sale so this deal is. Superior. I picked up 3 in the store and just order 2, 2 packs. You can't beat this deal. They even have a pack that is one box 0W-20 and one high mileage 5W-30.
I don't recall seeing these in the store. In the past I've only seen the 2-pack of 5-quart bottles.

Those used to go on sale regularly for $24.99. That was a real bargain.
Apr 11, 2026 10:37 PM
559 Comments
Joined Jul 2011
Greg007Apr 11, 2026 10:37 PM
559 Comments
Quote from superjon27 :
Which is a better value between this and the larger 2-pack? Or do they come out to about the same?
I think this is cheaper, but only available in 5w-30
1
Apr 11, 2026 11:08 PM
722 Comments
Joined Sep 2011
TAZ11Apr 11, 2026 11:08 PM
722 Comments
The 2 5qt jugs are 20¢ cheaper per qt.
Apr 11, 2026 11:08 PM
88 Comments
Joined Jul 2019
IndigoThread534Apr 11, 2026 11:08 PM
88 Comments
Quote from Sreeps :
I've used this oil for years. I drive vehicles that are usually 10+ years old. Oil is changed at or before 5k miles, or with the seasons (I drive my truck once a week). Never had a problem. I think most oil is probably fine as long as you're changing it. Change your oil people!
Either it meets rating standards or it doesn't. The rest is marketing.
Apr 11, 2026 11:15 PM
678 Comments
Joined Sep 2022
helloooomcflyApr 11, 2026 11:15 PM
678 Comments
Learned this years ago working for a big box auto parts retailer. Oil is essentially refined by two companies: Ashland and BP and private labeled for the likes of the Kirkland Kountry Klub, etc. If you look at the bottom back of the label, you should see "Made Here" and/or a refinery company's logo. 🤓

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Apr 11, 2026 11:17 PM
4.6K Comments
Joined Oct 2008
warsawsApr 11, 2026 11:17 PM
4.6K Comments
Quote from helloooomcfly :
Learned this years ago working for a big box auto parts retailer. Oil is essentially refined by two companies: Ashland and BP and private labeled for the likes of the Kirkland Kountry Klub, etc. If you look at the bottom back of the label, you should see "Made Here" and/or a refinery company's logo. 🤓
AndConfused
1
Apr 11, 2026 11:17 PM
200 Comments
Joined Aug 2019
CrazyBuckeyeApr 11, 2026 11:17 PM
200 Comments
Dang it, this is a very good deal and Costco has some other big packs of oil on sale, but I only need 0W-20 for our vehicles so I don't want to buy a pack that has 5W-30 etc included.
Apr 11, 2026 11:18 PM
34 Comments
Joined Jul 2023
Slkmaster2000Apr 11, 2026 11:18 PM
34 Comments
This is only marginally cheaper than Walmart supertech which is the same oil more or less. I think it's $17 for 5 quarts at Walmart. Lukewarm deal IMO
Apr 11, 2026 11:18 PM
4.6K Comments
Joined Oct 2008
warsawsApr 11, 2026 11:18 PM
4.6K Comments
Quote from CrazyBuckeye :
Dang it, this is a very good deal and Costco has some other big packs of oil on sale, but I only need 0W-20 for our vehicles so I don't want to buy a pack that has 5W-30 etc included.
Then don't buy 5w30 is my recommendation
Apr 11, 2026 11:19 PM
200 Comments
Joined Aug 2019
CrazyBuckeyeApr 11, 2026 11:19 PM
200 Comments
Quote from warsaws :
AndConfused
I think he's saying you really don't have to look for specific name brands and pay more for this brand or that brand. The costco brand synthetic is likely exactly as good as the valvoline synthetic etc. That makes these prices really good.
Apr 11, 2026 11:20 PM
200 Comments
Joined Aug 2019
CrazyBuckeyeApr 11, 2026 11:20 PM
200 Comments
Quote from TAZ11 :
The 2 5qt jugs are 20¢ cheaper per qt.
That's how I usually buy it from costco, the 2x5 Qt jug pack. The only issue is if you have a vehicle that uses a bit more than 5 Qts (like my honda uses 5.7qts), you don't have enough for an oil change if you just have one 5 qt jug, so you end up having to buy an additional quart anyway.
Apr 11, 2026 11:22 PM
200 Comments
Joined Aug 2019
CrazyBuckeyeApr 11, 2026 11:22 PM
200 Comments
Quote from warsaws :
Then don't buy 5w30 is my recommendation
Well yeah, of course I won't be buying the 5w30, but Costco has these big packs on sale for a good price but they are 5w-30 or mix different types of oil.

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Apr 12, 2026 12:51 AM
2.7K Comments
Joined Nov 2010
CreditGuyApr 12, 2026 12:51 AM
2.7K Comments
Well, my 06 Land Cruiser, 06 RAV 4 and 1995 Ranger all take 5w 30. I must say however I'm getting too old to be climbing under those things to change the oil. It's not nearly as easy as it used to be.

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