Slickdeals is community-supported. We may get paid by brands for deals, including promoted items.

frontpagephoinix | Staff posted Apr 14, 2026 06:34 AM

Item 1 of 3

frontpagephoinix | Staff posted Apr 14, 2026 06:34 AM

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

w/ S&S

$14

$24

41% off

Amazon

7 Comments 8,857 Views

Get Deal at Amazon

Good Deal

Bad Deal

Save

Amazon has 5-qt Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil on sale for $14.95 - $0.75 (5% Subscribe & Save discount) = $14.20. Shipping is free with Prime or on $35+ orders.

Note: You have the flexibility to manage your Subscribe & Save subscription at any time after your order ships. View Subscribe & Save filler items and our current Subscribe & Save Frontpage deals to unlock up to extra 15% savings when you have 5 or more items in your current monthly subscription.

Thanks to Deal Hunter phoinix 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

This offer matches previous Front Page deal that earned 19+ thumbs up.
Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
If you're not a student, there's also a free 1-Month Amazon Prime trial available.

Original Post

Written by phoinix | Staff

Note: You have the flexibility to manage your Subscribe & Save subscription at any time after your order ships. View Subscribe & Save filler items and our current Subscribe & Save Frontpage deals to unlock up to extra 15% savings when you have 5 or more items in your current monthly subscription.

Thanks to Deal Hunter phoinix 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

This offer matches previous Front Page deal that earned 19+ thumbs up.
Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
If you're not a student, there's also a free 1-Month Amazon Prime trial available.

Original Post

Written by phoinix | Staff

Deal Score

+53

Get Deal at Amazon

Price Intelligence

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

Deal History

Sale Price

Slickdeal

$NaN

Today

Post Date	Sold By	Sale Price	Activity
04/10/26	Amazon	$14 Frontpage	4
04/29/26	Amazon	$14 Frontpage	24

Current Prices

Sort: Lowest to Highest | Last Updated 5/4/2026, 10:36 PM

Sold By	Sale Price
Amazon	$14
The Home Depot	$20.97

Unregistered (You)

7 Comments

lawrence1007

Apr 14, 2026 09:52 PM

149 Posts

Joined Feb 2017

lawrence1007Apr 14, 2026 09:52 PM

149 Posts

When you can buy full synthetic at this price why buy blend

Core2Quad

Apr 14, 2026 09:57 PM

6,058 Posts

Joined Mar 2006

Core2QuadApr 14, 2026 09:57 PM

6,058 Posts

Quote from lawrence1007

When you can buy full synthetic at this price why buy blend

Where? The only deal around $14 I've seen is the costco 4x jug deals, but no 10W-30.

Last edited by Core2Quad April 14, 2026 at 03:02 PM.

asuka

Apr 16, 2026 10:47 AM

2,483 Posts

Joined Oct 2008

asukaApr 16, 2026 10:47 AM

2,483 Posts

Quote from Core2Quad

Where? The only deal around $14 I've seen is the costco 4x jug deals, but no 10W-30.

Think the idea is that it's only about $10 more, which works out to $0.0034 per mile extra.

For me, it boils down to how long you plan to own it. Great oil if your car can support it and you're selling at the end of the warranty period.

Modern car, you're hoping will last hundreds of thousands of miles, with turbo and/or timing chain, I'd pay the extra and get an API SQ rated full synthetic.

Core2Quad

Apr 16, 2026 05:09 PM

6,058 Posts

Joined Mar 2006

Core2QuadApr 16, 2026 05:09 PM

6,058 Posts

Quote from asuka

Modern car's don't use 10W-30 though. This is for an older vehicle.

You can get full synthetic oil from Walmart though for $18 any day that is high mileage.

I do know on my older Lexus that ran 5W-30 that this particular oil stopped my oil leak. When I ran regular full synthetic the oil leak came back.

Kraken09

Apr 17, 2026 01:03 PM

1,145 Posts

Joined Aug 2018

Kraken09Apr 17, 2026 01:03 PM

1,145 Posts

Quote from lawrence1007

When you can buy full synthetic at this price why buy blend

I'd love a link to that deal. I need 0w20 so if you can find that at $14 I need to know.

KushKing420

Apr 18, 2026 03:34 AM

96 Posts

Joined Jan 2020

KushKing420Apr 18, 2026 03:34 AM

96 Posts

Quote from Kraken09

I'd love a link to that deal. I need 0w20 so if you can find that at $14 I need to know.

Costco has Kirkland brand 5 quarts for 15 on sale right now.

Kraken09

Apr 18, 2026 07:17 PM

1,145 Posts

Joined Aug 2018

Kraken09Apr 18, 2026 07:17 PM

1,145 Posts

Quote from KushKing420

Costco has Kirkland brand 5 quarts for 15 on sale right now.

If I had a membership it would be great but then it wouldn't really be $14.00. good deal though

Unregistered (You)

Autos Auto Parts & Supplies Motor Oil Motor Oil Castrol Amazon

Rating:	(4.8 out of 5 stars)
Reviews:	3,283 Amazon Reviews
Manufacturer:	Castrol
Model Number:	03110
Product SKU:	B00GSX43WE
UPC:	79191231104
ASIN:	B00GSX43WE
Brand:	Castrol
Item Dimensions LxWxH:	11.9 x 9.5 x 4.5 inches
Item model number:	03110
Manufacturer:	Castrol

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

$14

$24

Editor's Notes

Original Post

Editor's Notes

Original Post

Community Voting

Price Intelligence

Deal History

Current Prices

Leave a Comment

7 Comments

Leave a Comment

Related Searches

Popular Deals

Trending Deals

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

$14

$24

Editor's Notes

Original Post

Editor's Notes

Original Post

Price Intelligence

Deal History Deal History includes data from multiple reputable stores, such as Best Buy, Target, and Walmart. The lowest price among stores for a given day is selected as the "Sale Price". Sale Price does not include sale prices at Amazon unless a deal was posted by a community member.

Current Prices

Leave a Comment

7 Comments

Leave a Comment

Related Searches

Deal History