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?
expiredRokket | Staff posted May 24, 2026 02:59 AM
  1. Deal Image
Item 1 of 4
  1. Deal Image
  2. Deal Image
  3. Deal Image
  4. Deal Image
Item 1 of 4
expiredRokket | Staff posted May 24, 2026 02:59 AM

5-qt Castrol GTX High Mileage Synthetic Blend Motor Oil (10W-30)

w/ S&S

$14

$32

56% off
Amazon
18 Comments
9,671 Views
Visit Amazon
Good Deal
Save
Share
Deal Details
Amazon has 5-qt Castrol GTX High Mileage Synthetic Blend Motor Oil (10W-30) on sale for $14.95 - $0.75 (5% Subscribe & Save discount) = $14.20. Shipping is free with Prime or on $35+ orders.Thanks to Deal Hunter Rokket for finding this deal.

Features:
  • Phosphorus Replacement Technology extends emission system life
  • Superior dispersancy fights sludge build up inside engine
  • Seal conditioners help reduce oil leaks from aging gaskets
  • Advanced additives prevent engine wear and improve fuel economy
  • Meets API SP/SN PLUS/SN/SM and ILSAC GF-6 specifications

Editor's Notes

Written by megakimcheelove | Staff

Original Post

Written by Rokket | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Amazon has 5-qt Castrol GTX High Mileage Synthetic Blend Motor Oil (10W-30) on sale for $14.95 - $0.75 (5% Subscribe & Save discount) = $14.20. Shipping is free with Prime or on $35+ orders.Thanks to Deal Hunter Rokket for finding this deal.

Features:
  • Phosphorus Replacement Technology extends emission system life
  • Superior dispersancy fights sludge build up inside engine
  • Seal conditioners help reduce oil leaks from aging gaskets
  • Advanced additives prevent engine wear and improve fuel economy
  • Meets API SP/SN PLUS/SN/SM and ILSAC GF-6 specifications

Editor's Notes

Written by megakimcheelove | Staff

Original Post

Written by Rokket | Staff

Community Voting

Deal Score
+50
Good Deal
Visit Amazon

Price Intelligence

Model: Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts

Deal History 

Sale Price
Slickdeal
  • $NaN
  • Today

Current Prices

Sort: Lowest to Highest | Last Updated 6/17/2026, 04:07 PM
Sold By Sale Price
Amazon$14.95

Leave a Comment

Unregistered (You)

Top Comments

JAX-FL
521 Posts
187 Reputation
Thats because this isnt not a bad deal.com nor not too amazing.com. Is it slick though? Id say yes, but only because its oil. nyuck nyuck.Big GrinBig Grin

18 Comments

Sign up for a Slickdeals account to remove this ad.

May 24, 2026 04:06 AM
19 Posts
Joined Apr 2026
SharpManatee101May 24, 2026 04:06 AM
19 Posts
It's not a bad deal but not too amazing either
May 24, 2026 12:50 PM
521 Posts
Joined Aug 2010
JAX-FLMay 24, 2026 12:50 PM
521 Posts
Quote from SharpManatee101 :
It's not a bad deal but not too amazing either
Thats because this isnt not a bad deal.com nor not too amazing.com. Is it slick though? Id say yes, but only because its oil. nyuck nyuck.Big GrinBig Grin
Last edited by JAX-FL May 24, 2026 at 06:01 AM.
5
May 24, 2026 04:21 PM
2,857 Posts
Joined Aug 2016
MX400ex72May 24, 2026 04:21 PM
2,857 Posts
Got one for the mowers. Quick google search suggest small engines may benefit from a syn blend more so than full syn.

Either way, it's going in the mower, which likely doesn't care much what oil you put in it.
May 24, 2026 08:28 PM
1,122 Posts
Joined Nov 2015
bilderbergMay 24, 2026 08:28 PM
1,122 Posts
Meh deal for a blend. But like MX400 said, good for lawn equipment.
May 25, 2026 05:05 PM
508 Posts
Joined Jan 2015
san-melMay 25, 2026 05:05 PM
508 Posts
Good enough.
May 25, 2026 05:13 PM
20 Posts
Joined Mar 2026
FairMustang164May 25, 2026 05:13 PM
20 Posts
just ok deal
May 25, 2026 05:45 PM
707 Posts
Joined Dec 2012
fsu67May 25, 2026 05:45 PM
707 Posts
Looks like a pretty good deal, I haven't seen too many blends on sale. I have an older truck with a few leaks and this is what I use, I don't know why when I use full synthetic it leaks much worse.

Sign up for a Slickdeals account to remove this ad.

May 25, 2026 05:53 PM
171 Posts
Joined Aug 2018
GreyTent1404May 25, 2026 05:53 PM
171 Posts
no matter what, it is most important that you actually change your oil. The type is the least important
May 25, 2026 06:05 PM
1,995 Posts
Joined Dec 2007
AssaultLifeMay 25, 2026 06:05 PM
1,995 Posts
Good deal.
May 25, 2026 07:14 PM
6,641 Posts
Joined Mar 2011
ballershanelleMay 25, 2026 07:14 PM
6,641 Posts
Quote from fsu67 :
Looks like a pretty good deal, I haven't seen too many blends on sale. I have an older truck with a few leaks and this is what I use, I don't know why when I use full synthetic it leaks much worse.
. Convention would be better and just change like we always 3k miles
2
May 25, 2026 10:47 PM
707 Posts
Joined Dec 2012
fsu67May 25, 2026 10:47 PM
707 Posts
Quote from ballershanelle :
. Convention would be better and just change like we always 3k miles
I still change it at 3,000 even though it's blend, it's really hard to find a conventional 10W30 5qt jug at this price
May 26, 2026 06:34 PM
74 Posts
Joined Mar 2017
MacaraMay 26, 2026 06:34 PM
74 Posts
Nice deal
May 27, 2026 05:18 PM
216 Posts
Joined Oct 2025
SiennaAlpaca1565May 27, 2026 05:18 PM
216 Posts
Quote from GreyTent1404 :
no matter what, it is most important that you actually change your oil. The type is the least important
Exactly. I've almost never cared what oil I use so long as I change it regularly. All my vehicles make it to 300,000 I get rid of them because I'm tired of looking at them or I get rear-ended.
May 27, 2026 05:20 PM
216 Posts
Joined Oct 2025
SiennaAlpaca1565May 27, 2026 05:20 PM
216 Posts
Quote from bilderberg :
Meh deal for a blend. But like MX400 said, good for lawn equipment.
Hardly matters what you put this in since it's happy it has an oil change.

Sign up for a Slickdeals account to remove this ad.

May 27, 2026 05:28 PM
216 Posts
Joined Oct 2025
SiennaAlpaca1565May 27, 2026 05:28 PM
216 Posts
Quote from fsu67 :
Looks like a pretty good deal, I haven't seen too many blends on sale. I have an older truck with a few leaks and this is what I use, I don't know why when I use full synthetic it leaks much worse.
Full synthetic is smaller on a molecular level. Just like you must have imagined since it does leak out faster. High mileage oils have additional additive in them that is supposed to help swell rubber seals. Not all gaskets just some of the rubber seals. This may possibly slow down your leak depending on how bad it is. Full synthetic which won't be high mileage, pretty much for this reason will dump right out of an older vehicle with leaky seals. I've almost always been happy with nonsynthetics and frequent oil changes. If I run a full synthetic I still change the oil early then others do at about 5000 miles and it hurts me every moment after 3000 to watch the gauge.

Leave a Comment

Unregistered (You)

Related Searches

AutosMotor OilMotor OilCastrolAmazon

Popular Deals

See All
Found by phoinix
Jun 15, 2026 08:44 AM
Forum Thread
$799.99* | 49″ SAMSUNG Odyssey OLED G9 Dual QHD QD-OLED G-Sync Compatible Curved Gaming Monitor, 144Hz, 0.03ms (G91SD) at Amazon$800$1,300
38% off
2
Found by ppxyz1
Today 04:30 PM
Forum Thread
Philips Wi-Fi Smart Door Lock w/ Fingerprint ID, Keypad, Auto Lock & App Control $54.99 & More + Free Shipping w/ Prime$55$190
71% off
0
Found by neomatrixviper
Today 10:32 AM
Forum Thread
Philips Norelco - OneBlade 360 Pro Hybrid Face & Body Electric Trimmer QP6552/70 - Black $52.99 Bestbuy.com
1
Found by SickerDealer
Jun 11, 2026 11:30 PM
Forum Thread
adidas Women's Grand Court Shoes (Arctic Night / Cloud White / Gold Metallic) $27$27$75
64% off
0
Found by Immortalsolitude
Today 02:31 AM
Forum Thread
[S&S] e.l.f. Glossy Lip Stain Shades 4 Days Kit, Long-Lasting Lip Stains For A Sheer Pop Of Color & Subtle Gloss Finish, Vegan & Cruelty-Free, 4 Shades $11.40$11$24
54% off
0

Trending Deals

See All
Found by hawkblu09
Today 03:37 PM
Forum Thread
12V 6A Temola Automatic Car Battery Charger & Maintainer w/ Pulse Repair & Digital Display $11.49 + Free Shipping w/ Prime or on $35+$11$23
52% off
1
Found by FrugalForever
Today 07:49 PM
Forum Thread
PUMA Men's Court Shoe White Various Sizes $19.97 + FS Costco.com$20$76
73% off
2
Found by Eragorn
Today 05:58 PM
Forum Thread
Nintendo eShop Deals: Risk of Rain 2 $6.24; Dispatch $24; Red Dead Redemption $25; L.A. Noire $25 & More$6.24$25
75% off
5
Found by Bojjihuntindeals
Today 06:31 PM
Forum Thread
10-Item Dungeon Defenders 2 Complete DLC Chest Bundle (PC Digital Download) $20$20$324
93% off
0
Found by Bojjihuntindeals
Today 06:46 PM
Forum Thread
Chaps Men's Holiday Blackwatch Blazer (42S, Green Navy) $20.70 + Free S&H w/ Walmart+ or on $35+$21$80
73% off
0