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Frugie 12.1K Views
May 3, 2026 6:34 PM

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

$14

$24

41% off
w/ S&Sat Amazon
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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. [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

Original Post

Written by Frugie
Community Notes
About the Poster
Deal Details
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. [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

Original Post

Written by Frugie

Community Voting

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13 Comments

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May 3, 2026 11:14 PM
2.8K Comments
Joined Oct 2008
asukaMay 3, 2026 11:14 PM
2.8K Comments
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.
May 4, 2026 1:15 AM
367 Comments
Joined Jan 2013
EBGwdMay 4, 2026 1:15 AM
367 Comments
Quote from asuka View quoted comment :
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%?
May 4, 2026 2:12 AM
136 Comments
Joined Mar 2017
MacaraMay 4, 2026 2:12 AM
136 Comments
Great deal
Pro
May 4, 2026 2:37 PM
388 Comments
Joined Nov 2017
teknower
Pro
May 4, 2026 2:37 PM
388 Comments
Just get Kirkland full synth from Costco. 2 pack is 30 bucks and is much better oil.
1
1
May 4, 2026 4:14 PM
1.3K Comments
Joined Nov 2012
darksiderisingMay 4, 2026 4:14 PM
1.3K Comments
Quote from EBGwd View quoted comment :
Synblend... wonder what % is Synthetic. 2%? 20%? 40%?
No way to know I believe. Love when terms like this are completely unregulated.
May 4, 2026 4:57 PM
2.8K Comments
Joined Oct 2008
asukaMay 4, 2026 4:57 PM
2.8K Comments
Quote from EBGwd View quoted comment :
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.
1
May 4, 2026 10:03 PM
154 Comments
Joined Feb 2025
BraveMustang5764May 4, 2026 10:03 PM
154 Comments
Quote from teknower View quoted comment :
Just get Kirkland full synth from Costco. 2 pack is 30 bucks and is much better oil.
Link?

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May 5, 2026 9:14 PM
500 Comments
Joined Jun 2007
mx7May 5, 2026 9:14 PM
500 Comments
Quote from BraveMustang5764 View quoted comment :
Link?
In store only.
May 5, 2026 9:37 PM
404 Comments
Joined Apr 2012
PlacentachefMay 5, 2026 9:37 PM
404 Comments
Quote from BraveMustang5764 View quoted comment :
Link?
Kirkland deal ended 5-3-26
May 6, 2026 2:44 PM
337 Comments
Joined Feb 2022
BraveSummer7472May 6, 2026 2:44 PM
337 Comments
Quote from teknower View quoted comment :
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!
May 7, 2026 8:46 AM
482 Comments
Joined Nov 2018
rup831May 7, 2026 8:46 AM
482 Comments
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?
May 9, 2026 12:51 AM
1.4K Comments
Joined Mar 2009
kgorillaMay 9, 2026 12:51 AM
1.4K Comments
Quote from rup831 View quoted comment :
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?
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.
May 10, 2026 12:27 PM
185 Comments
Joined May 2018
GreyRiver608May 10, 2026 12:27 PM
185 Comments
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...

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