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frontpagePennyFound | Staff posted Jun 13, 2026 06:13 PM
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frontpagePennyFound | Staff posted Jun 13, 2026 06:13 PM

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

w/ S&S

$14

$25

44% off
Amazon
19 Comments
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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% Subscribe & Save discount) = $14.20. Shipping is free with Prime or on $35+ orders.Thanks to Deal Hunter PennyFound for finding this deal.

Alternatively, 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.

About this item:
  • Phosphorus Replacement Technology helps extend emission system life
  • Superior dispersion 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
  • 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

Editor's Notes

Written by Neo45 | Staff

Original Post

Written by PennyFound | 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% Subscribe & Save discount) = $14.20. Shipping is free with Prime or on $35+ orders.Thanks to Deal Hunter PennyFound for finding this deal.

Alternatively, 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.

About this item:
  • Phosphorus Replacement Technology helps extend emission system life
  • Superior dispersion 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
  • 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

Editor's Notes

Written by Neo45 | Staff

Original Post

Written by PennyFound | Staff

Community Voting

Deal Score
+44
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Get Deal at Amazon

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

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Sort: Lowest to Highest | Last Updated 6/17/2026, 12:10 PM
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Amazon$14.95

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19 Comments

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Jun 14, 2026 02:05 AM
59 Posts
Joined Jan 2026
SensibleMeat495Jun 14, 2026 02:05 AM
59 Posts
Great price. Don't miss out!
1
3
Jun 14, 2026 10:36 AM
3,555 Posts
Joined Feb 2009
long_time_lurkeJun 14, 2026 10:36 AM
3,555 Posts

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

10w30 is $14.95
https://www.amazon.com/dp/B00GSX4...RhaWw&th=1
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Jun 14, 2026 10:48 AM
2,231 Posts
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Papi-Chino
Pro
Jun 14, 2026 10:48 AM
2,231 Posts

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

This not full synthetic y'all. Its blend. Meaning it's like orange juice from concentrate, where they add some other BS in there.
2
2
Jun 14, 2026 11:53 AM
16,918 Posts
Joined Jan 2004
chong67Jun 14, 2026 11:53 AM
16,918 Posts
Quote from Papi-Chino :
This not full synthetic y'all. Its blend. Meaning it's like orange juice from concentrate, where they add some other BS in there.
Just $5 more, you get Supertech *full synthetic* $19 every day. I hope that is OJ to OJ. hahaha
1
1
Jun 14, 2026 12:08 PM
724 Posts
Joined Feb 2006
pelermonJun 14, 2026 12:08 PM
724 Posts
Some say a blend is just as good, or better.
4
Jun 14, 2026 12:52 PM
45 Posts
Joined Jan 2020
FabulousHamster606Jun 14, 2026 12:52 PM
45 Posts
Quote from pelermon :
Some say a blend is just as good, or better.
Some say I'm an emperor of China.
4
3
Jun 14, 2026 01:44 PM
562 Posts
Joined Mar 2007
HeathAU25Jun 14, 2026 01:44 PM
562 Posts
Quote from Papi-Chino :
This not full synthetic y'all. Its blend. Meaning it's like orange juice from concentrate, where they add some other BS in there.
Some of us with really old cars prefer the blend. Keeps those deposits in the gaskets intact haha

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Jun 14, 2026 01:45 PM
5,693 Posts
Joined Jul 2007
michi098Jun 14, 2026 01:45 PM
5,693 Posts
Quote from pelermon :
Some say a blend is just as good, or better.
Never heard anyone say blended is better than synthetic. Synthetic oil is better than regular oil because it resists breakdown longer and has less impurities. A blended oil has just part of those qualities. So overall it still breaks down quicker and isn't as pure. If you change your oil often, blended is probably fine. But why be stingy with the most important part of your engine. $10 more and you get full synthetic.
2
1
Jun 14, 2026 02:19 PM
852 Posts
Joined Nov 2008
reapermanJun 14, 2026 02:19 PM
852 Posts
Quote from michi098 :
Never heard anyone say blended is better than synthetic. Synthetic oil is better than regular oil because it resists breakdown longer and has less impurities. A blended oil has just part of those qualities. So overall it still breaks down quicker and isn't as pure. If you change your oil often, blended is probably fine. But why be stingy with the most important part of your engine. $10 more and you get full synthetic.
Agree, however $10 more and the deal isnt slick. Fifteen dollar oil is a good deal as long as you keep up on your oil changes.
Jun 14, 2026 02:24 PM
5,693 Posts
Joined Jul 2007
michi098Jun 14, 2026 02:24 PM
5,693 Posts
Quote from reaperman :
Agree, however $10 more and the deal isnt slick. Fifteen dollar oil is a good deal as long as you keep up on your oil changes.
That's what I said. But if full synthetic oil ends up giving your engine another few years of life or keeps your maintenance costs down while you own the car, an extra $10 every few months is probably still worth it. At least that's what I'm doing with my older car.
Jun 14, 2026 02:27 PM
1,935 Posts
Joined Oct 2006
SweetDroolJun 14, 2026 02:27 PM
1,935 Posts
Popping my corn now!
2
Jun 14, 2026 02:45 PM
84 Posts
Joined Dec 2024
HighFlightJun 14, 2026 02:45 PM
84 Posts
My car seems to burn less of the blend than full synthetic.
Jun 14, 2026 05:11 PM
6,814 Posts
Joined Oct 2010
joshuaNHJun 14, 2026 05:11 PM
6,814 Posts
Quote from pelermon :
Some say a blend is just as good, or better.
And some say the earth is FLAT. It sounds like you are part of this group.

Synthetic oil is better in every test.. but ultimately it comes down to what your manufacturer says.
1
Jun 14, 2026 05:13 PM
6,814 Posts
Joined Oct 2010
joshuaNHJun 14, 2026 05:13 PM
6,814 Posts
Quote from HighFlight :
My car seems to burn less of the blend than full synthetic.

Make and year of your car.

Many manufacturers F'ED UP and used faulty piston rings... espically for Toyota and Subaru and I am sure many others.

If your car engine is burning oil... that does not mean synthetic is better... it means your have an issue with your car engine.
3

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Jun 15, 2026 01:21 AM
16,918 Posts
Joined Jan 2004
chong67Jun 15, 2026 01:21 AM
16,918 Posts
I just do Supertech synthetic and oil change at 10K, end of story. Car is doing well at 240K.

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