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frontpageFrugie posted May 03, 2026 06:34 PM

Item 1 of 3

frontpageFrugie posted May 03, 2026 06:34 PM

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

w/ S&S

$14

$24

41% off

Amazon

13 Comments 9,993 Views

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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. [discuss]

Note: Availability for pickup will vary by location.

Thanks to community members Frugie & PhoTheNguyen85 for finding 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 johnny_miller | Staff

About this deal:
- This price matches recent Frontpage Deals.
- Please see the original post for additional deal ideas & give the forum comments a read for helpful discussion.
About this product:
- Rated 4.8 out of 5 stars based on over 3.2k Amazon customer reviews.
About this store:
- 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 Frugie

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 johnny_miller | Staff

About this deal:
- This price matches recent Frontpage Deals.
- Please see the original post for additional deal ideas & give the forum comments a read for helpful discussion.
About this product:
- Rated 4.8 out of 5 stars based on over 3.2k Amazon customer reviews.
About this store:
- 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 Frugie

Deal Score

+42

Get Deal at Amazon

Price Intelligence

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

Deal History

Sale Price

Slickdeal

$NaN

Today

Post Date	Sold By	Sale Price	Activity
05/19/26	Amazon	$14 Frontpage	23
05/18/26	Amazon	$14 Popular	1
05/17/26	Amazon	$14 Frontpage	13
04/17/26	Amazon	$14 Frontpage	37
04/10/26	Amazon	$14 Frontpage	23

Current Prices

Sort: Lowest to Highest | Last Updated 5/25/2026, 12:58 AM

Sold By	Sale Price
Amazon	$14.95

Unregistered (You)

13 Comments

asuka

May 03, 2026 11:14 PM

2,549 Posts

Joined Oct 2008

asukaMay 03, 2026 11:14 PM

2,549 Posts

Great for a syn blend. API SP. I'd use this in older cars with no turbo or timing chain.

But all my cars do today, so I use API SQ rated with as thick as I can get away with.

EBGwd

May 04, 2026 01:15 AM

350 Posts

Joined Jan 2013

EBGwdMay 04, 2026 01:15 AM

350 Posts

Quote from asuka

Great for a syn blend. API SP. I'd use this in older cars with no turbo or timing chain. But all my cars do today, so I use API SQ rated with as thick as I can get away with.

Synblend... wonder what % is Synthetic. 2%? 20%? 40%?

Macara

May 04, 2026 02:12 AM

58 Posts

Joined Mar 2017

MacaraMay 04, 2026 02:12 AM

58 Posts

Great deal

teknower

May 04, 2026 02:37 PM

360 Posts

Joined Nov 2017

teknowerMay 04, 2026 02:37 PM

360 Posts

Just get Kirkland full synth from Costco. 2 pack is 30 bucks and is much better oil.

darksiderising

May 04, 2026 04:14 PM

1,127 Posts

Joined Nov 2012

darksiderisingMay 04, 2026 04:14 PM

1,127 Posts

Quote from EBGwd

Synblend... wonder what % is Synthetic. 2%? 20%? 40%?

No way to know I believe. Love when terms like this are completely unregulated.

asuka

May 04, 2026 04:57 PM

2,549 Posts

Joined Oct 2008

asukaMay 04, 2026 04:57 PM

2,549 Posts

Quote from EBGwd

Synblend... wonder what % is Synthetic. 2%? 20%? 40%?

The SP rating acts as a backstop there. Regardless it's very high quality. This is better performing than most full synthetics were required a decade ago.

BraveMustang5764

May 04, 2026 10:03 PM

142 Posts

Joined Feb 2025

BraveMustang5764May 04, 2026 10:03 PM

142 Posts

Quote from teknower

Just get Kirkland full synth from Costco. 2 pack is 30 bucks and is much better oil.

Link?

mx7

May 05, 2026 09:14 PM

490 Posts

Joined Jun 2007

mx7May 05, 2026 09:14 PM

490 Posts

Quote from BraveMustang5764

Link?

In store only.

jeremylh56

May 05, 2026 09:37 PM

323 Posts

Joined Apr 2012

jeremylh56May 05, 2026 09:37 PM

323 Posts

Quote from BraveMustang5764

Link?

Kirkland deal ended 5-3-26

BraveSummer7472

May 06, 2026 02:44 PM

265 Posts

Joined Feb 2022

BraveSummer7472May 06, 2026 02:44 PM

265 Posts

Quote from teknower

Just get Kirkland full synth from Costco. 2 pack is 30 bucks and is much better oil.

I usually grab a few of their 4pk boxes for about 55. Solid deal!

rup831

May 07, 2026 08:46 AM

464 Posts

Joined Nov 2018

rup831May 07, 2026 08:46 AM

464 Posts

Someone please help me with this. How to 'use' this if I I do not change the oil myself? Usually I take my vehicle to a nearest shop for an oil change, like Walmart Auto or Big O' tires. Would they accept this if I hand this to them or they will only use their store bought ones?

kgorilla

Pro

May 09, 2026 12:51 AM

1,384 Posts

Joined Mar 2009

kgorilla

Pro

May 09, 2026 12:51 AM

1,384 Posts

Quote from rup831

If you call around to local shops some may charge you $20-$30 if you supply your own oil and filter. The stores you mention I believe either wouldn't do it or wouldn't knock enough off the cost for it to make sense.

GreyRiver608

May 10, 2026 12:27 PM

152 Posts

Joined May 2018

GreyRiver608May 10, 2026 12:27 PM

152 Posts

With all the full synthetic deals that goes around these days (not to mention Costco), it doesn't make sense to get a synthetic blend oil until it's like dirt cheap...

Unregistered (You)

Autos Motor Oil Castrol Amazon

Rating:	(4.8 out of 5 stars)
Reviews:	3,274 Amazon Reviews
Manufacturer:	Castrol
Model Number:	03100
Product SKU:	B00JGQLS64
UPC:	79191231005
ASIN:	B00JGQLS64
Brand:	Castrol
Item model number:	03100
Manufacturer:	Castrol

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

$14

$24

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

$14

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Editor's Notes

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