Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
Heads up, this deal has expired. Want to create a deal alert for this item?
expiredphoinix | Staff posted Apr 10, 2026 12:46 PM
  1. Deal Image
Item 1 of 3
  1. Deal Image
  2. Deal Image
  3. Deal Image
Item 1 of 3
expiredphoinix | Staff posted Apr 10, 2026 12:46 PM

5-Qt Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil

w/ S&S

$14

$24

41% off
Amazon
22 Comments 8,694 Views
Visit Amazon
Good Deal
Save
Share
Deal Details
Amazon has 5-Quart Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil on sale for $14.95 - $0.75 (5%) when you check out via Subscribe & Save = $14.20. Shipping is free with Prime or on $35+ orders.

Select Advance Auto Parts Stores also have 5-Quart Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil on sale for $14.95. Select free store pickup where stock permits.
  • Note: Availability for pickup may vary by location.
Thanks to Deal Hunter phoinix for sharing this deal.

Product Details:
  • Phosphorus Replacement Technology helps extend emission system life
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards* | Seal conditioners to help reduce leaks
  • Advanced additives that help prevent engine wear | Improved Fuel Economy**
  • Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM | ILSAC GF-6 | Meets Ford WSS-M2C945-B1 | Meets Ford WSS-M2C960-A1 |* Based on API and ACEA volatility specifications | ** In 5W-20, 5W-30 and 10W-30 grades versus industry specifications

Editor's Notes

Written by Nate650 | Staff
  • About this deal:
    • Our research indicates that this deal is $8.76 less (38.2% savings) than the next best available price from a reputable merchant with prices starting from $22.96 at the time of this post.
  • About this product:
    • Rated 4.8 out of 5 stars based on over 3.2k Amazon customer reviews.
  • About this store:
  • 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 phoinix | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Amazon has 5-Quart Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil on sale for $14.95 - $0.75 (5%) when you check out via Subscribe & Save = $14.20. Shipping is free with Prime or on $35+ orders.

Select Advance Auto Parts Stores also have 5-Quart Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil on sale for $14.95. Select free store pickup where stock permits.
  • Note: Availability for pickup may vary by location.
Thanks to Deal Hunter phoinix for sharing this deal.

Product Details:
  • Phosphorus Replacement Technology helps extend emission system life
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards* | Seal conditioners to help reduce leaks
  • Advanced additives that help prevent engine wear | Improved Fuel Economy**
  • Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM | ILSAC GF-6 | Meets Ford WSS-M2C945-B1 | Meets Ford WSS-M2C960-A1 |* Based on API and ACEA volatility specifications | ** In 5W-20, 5W-30 and 10W-30 grades versus industry specifications

Editor's Notes

Written by Nate650 | Staff
  • About this deal:
    • Our research indicates that this deal is $8.76 less (38.2% savings) than the next best available price from a reputable merchant with prices starting from $22.96 at the time of this post.
  • About this product:
    • Rated 4.8 out of 5 stars based on over 3.2k Amazon customer reviews.
  • About this store:
  • 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 phoinix | Staff

Community Voting

Deal Score
+47
Good Deal
Visit Amazon

Price Intelligence

Model: Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil, 5 Quarts

Deal History 

Sale Price
Slickdeal
  • $NaN
  • Today

Leave a Comment

Unregistered (You)

Top Comments

rod4400
619 Posts
81 Reputation
Yeah and full synthetic is so cheap these days I don't know why anyone even bothers with blends.

22 Comments

Sign up for a Slickdeals account to remove this ad.

Apr 10, 2026 01:37 PM
871 Posts
Joined Apr 2021
TalentedHaddock257Apr 10, 2026 01:37 PM
871 Posts
Seems as good as the Costco deal right now. Grab this if you don't have Costco.
2
Apr 10, 2026 01:57 PM
29 Posts
Joined Jul 2018
RukuLApr 10, 2026 01:57 PM
29 Posts

Our community has rated this post as helpful. If you agree, why not thank RukuL

that's a blend
1
Apr 10, 2026 02:00 PM
518 Posts
Joined Nov 2013
SnowJunkie21Apr 10, 2026 02:00 PM
518 Posts
Quote from TalentedHaddock257 :
Seems as good as the Costco deal right now. Grab this if you don't have Costco.
Here is the link to the Costco deal which is also full synthetic. $13.25 per 5qts https://slickdeals.net/f/19388295
Apr 10, 2026 03:20 PM
871 Posts
Joined Apr 2021
TalentedHaddock257Apr 10, 2026 03:20 PM
871 Posts
Quote from SnowJunkie21 :
Here is the link to the Costco deal which is also full synthetic. $13.25 per 5qts https://slickdeals.net/f/19388295
Shipping is not free for me
Apr 10, 2026 03:29 PM
619 Posts
Joined Dec 2013
rod4400Apr 10, 2026 03:29 PM
619 Posts
Quote from RukuL :
that's a blend
Yeah and full synthetic is so cheap these days I don't know why anyone even bothers with blends.
Apr 10, 2026 08:50 PM
2 Posts
Joined May 2020
zly2625Apr 10, 2026 08:50 PM
2 Posts
Quote from TalentedHaddock257 :
Seems as good as the Costco deal right now. Grab this if you don't have Costco.
Costco is full synthetic
Apr 10, 2026 09:04 PM
663 Posts
Joined Dec 2012
fsu67Apr 10, 2026 09:04 PM
663 Posts
This is what I was looking for! I have lots of miles, light leaks and a good brand. Not sure what brand Costco is using now since they have changed over the years.

Sign up for a Slickdeals account to remove this ad.

Apr 10, 2026 09:16 PM
155 Posts
Joined May 2023
SmartWallaby9457Apr 10, 2026 09:16 PM
155 Posts
Synthetic lasts longer, at 4500 - 5k miles.
Only for people doing their own oil changes.
2
Apr 10, 2026 09:21 PM
113 Posts
Joined Oct 2009
rafbdfApr 10, 2026 09:21 PM
113 Posts
Nice deal thanks OP
Apr 10, 2026 09:30 PM
200 Posts
Joined Sep 2014
megamarkApr 10, 2026 09:30 PM
200 Posts
Thanks OP. I stocked up. Walmart used to stock this at around $24 but I haven't been able to find it in a while.
Apr 10, 2026 09:52 PM
78 Posts
Joined Dec 2013
MonarzApr 10, 2026 09:52 PM
78 Posts
same deal at costco
Apr 10, 2026 11:58 PM
836 Posts
Joined Oct 2007
CowboyjloveApr 10, 2026 11:58 PM
836 Posts
Not a real Synthetic but a blend
1
Apr 11, 2026 01:29 AM
286 Posts
Joined Oct 2010
vess68Apr 11, 2026 01:29 AM
286 Posts
Quote from RukuL :
that's a blend
Thanks, I almost missed that
Apr 11, 2026 02:27 AM
2,426 Posts
Joined Oct 2008
asukaApr 11, 2026 02:27 AM
2,426 Posts
Syn Blend 5w-20 is a good option if you have a car you're getting rid of when the warranty ends.

If you want 300,000 miles you want an API SQ full synthetic.
3

Sign up for a Slickdeals account to remove this ad.

Apr 11, 2026 03:23 AM
10 Posts
Joined Apr 2018
OrangeKitten1930Apr 11, 2026 03:23 AM
10 Posts
10w30 same price...think small engines.

Leave a Comment

Unregistered (You)

Related Searches

AutosMotor OilCastrolAmazon

Popular Deals

See All
Found by doublehelixx
Yesterday 03:29 PM
Forum Thread
2-Pack Heleman Magnetic Door Stopper/Catch (Silver) $5.99 + Free Shipping w/ Prime or on $35+$5.99$12
50% off
1
Found by douggiestyle
Today 03:46 AM
Forum Thread
Refurb/Excellent: 49mm Apple Watch Ultra 2 GPS + Cellular Smartwatch $314.87$315$799
60% off
2
Found by jk6812
Today 01:37 AM
Forum Thread
3-Pack Men's Cotton-Stretch Boxer Briefs (Various, Limited Sizes) from $7.43 + Free Shipping w/ Walmart+ or on $35+
0
Found by Rokket
Today 01:15 AM
Forum Thread
7" Vampliers vPlus Stripped Screw Extractor Pliers $31.97 & More + Free S&H w/ Prime or $35+$32$38
15% off
1
Found by phoinix
Yesterday 10:27 PM
Forum Thread
[Prime, AC] $26.21 | 6-Piece 28-Oz vancasso Bohemian Style Ceramic Soup Bowls at Amazon$26$46
43% off
1

Trending Deals

See All
Found by SAO2
Today 02:33 AM
Forum Thread
T-Mobile TCL NXTPAPER 70 Pro On Us Free with Any Trade via 24 month bill credits$200
7
Found by kivfer
Yesterday 04:50 PM
Forum Thread
Zalman CUBIX-G Micro-ATX PC Case, MATX Case with 3 X 120mm FRGB Fans Pre-Installed, Panoramic View Tempered Glass Panels, USB Type-C Port, Fits up to 280mm GPUs $30 FS @newegg
9
Found by phoinix
Today 01:38 AM
Forum Thread
[Prime] $3.99* | 12-Pk 7" x 8" AIDEA Non Scratch Wire Dishcloth Cleaning Pads at Amazon$3.99$5.99
33% off
1
Found by jk6812
Today 03:27 AM
Forum Thread
115AW Dyson Car+Boat Handheld Vacuum $229.00 + Free S/H$229$300
23% off
0
Found by Immortalsolitude
Today 01:38 AM
Forum Thread
Flex Track 15ft for Kids, Build-Your-Own Creative Race Track Set, Vibrant Orange & White with Toy Cars & Parts $10.39$10$22
54% off
1