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expiredArseneWenger posted Jun 24, 2025 06:52 AM
expiredArseneWenger posted Jun 24, 2025 06:52 AM

5-qt Castrol GTX Full Synthetic Motor Oil: 0W-20 $22.75, 5W-20

w/ Subscribe & Save

$20

$26

23% off
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Deal Details
Amazon has 5-qt Castrol GTX Full Synthetic Motor Oil (5W-20) on sale for $21.08 - $1.05 (5% Subscribe & Save discount) = $20.03. Shipping is free with Prime or on $35+ orders.

Amazon has 5-qt Castrol GTX Full Synthetic Motor Oil (0W-20) on sale for $23.96 - $1.20 (5% Subscribe & Save discount) = $22.76. Shipping is free with Prime or on $35+ orders.

Thanks to community member ArseneWenger for finding this deal.

Features:
  • 6X better wear protection on critical engine parts than industry standards
  • 1.3X better sludge protection than industry standards
  • 3X Stronger against viscosity breakdown than leading full synthetic
  • Protection for 10,000 miles between oil changes

Editor's Notes

Written by megakimcheelove | Staff

Original Post

Written by ArseneWenger
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has 5-qt Castrol GTX Full Synthetic Motor Oil (5W-20) on sale for $21.08 - $1.05 (5% Subscribe & Save discount) = $20.03. Shipping is free with Prime or on $35+ orders.

Amazon has 5-qt Castrol GTX Full Synthetic Motor Oil (0W-20) on sale for $23.96 - $1.20 (5% Subscribe & Save discount) = $22.76. Shipping is free with Prime or on $35+ orders.

Thanks to community member ArseneWenger for finding this deal.

Features:
  • 6X better wear protection on critical engine parts than industry standards
  • 1.3X better sludge protection than industry standards
  • 3X Stronger against viscosity breakdown than leading full synthetic
  • Protection for 10,000 miles between oil changes

Editor's Notes

Written by megakimcheelove | Staff

Original Post

Written by ArseneWenger

Community Voting

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Top Comments

looser24
1343 Posts
127 Reputation
Here's a wild idea, maybe you should use the oil specs that your owners manual says to use.

22 Comments

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Jun 24, 2025 02:25 PM
4,233 Posts
Joined Aug 2011

This comment has been rated as unhelpful by Slickdeals users.

Jun 24, 2025 03:08 PM
109 Posts
Joined Nov 2014
jard1sJun 24, 2025 03:08 PM
109 Posts
Quote from fritzo :
Just a quick tip- probably not good to use this in the summer as it's a thinner oil. This is more on a cold winter oil.
Theoretically correct that it functions better in the cold than 0w but should be fine for summer as well.
Jun 24, 2025 03:15 PM
1,343 Posts
Joined Oct 2016
looser24Jun 24, 2025 03:15 PM
1,343 Posts

Our community has rated this post as helpful. If you agree, why not thank looser24

Here's a wild idea, maybe you should use the oil specs that your owners manual says to use.
9
2
1
Jun 24, 2025 05:13 PM
787 Posts
Joined Nov 2012
slickbangerJun 24, 2025 05:13 PM
787 Posts
Quote from looser24 :
Here's a wild idea, maybe you should use the oil specs that your owners manual says to use.
Oil is oil ask your brother diddy👌
8
1
Original Poster
Jun 24, 2025 05:17 PM
3,162 Posts
Joined Feb 2011
ArseneWenger
Original Poster
Jun 24, 2025 05:17 PM
3,162 Posts
The higher end "Edge" line is also the same price for 0W-20.
Jun 24, 2025 05:25 PM
958 Posts
Joined May 2007
goixizJun 24, 2025 05:25 PM
958 Posts
Quote from fritzo :
Just a quick tip- probably not good to use this in the summer as it's a thinner oil. This is more on a cold winter oil.
depends on your motor not a general statement
Jun 24, 2025 05:30 PM
515 Posts
Joined Jun 2011

This comment has been rated as unhelpful by Slickdeals users.

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Jun 24, 2025 05:48 PM
358 Posts
Joined Apr 2010
rs21Jun 24, 2025 05:48 PM
358 Posts
Walmart price is $21.03, https://www.walmart.com/ip/Castro...om=/search

Will get it from walmart
Jun 24, 2025 06:50 PM
54 Posts
Joined Jul 2022
PurpleLadybug1016Jun 24, 2025 06:50 PM
54 Posts
Quote from robvas :
Shame there's no 5-30 or 5-40

0-20 and 5-20 are a joke
Try this
https://a.co/d/bbpzbHh
Jun 24, 2025 07:11 PM
1,482 Posts
Joined Sep 2011
SoukaJun 24, 2025 07:11 PM
1,482 Posts
Quote from robvas :
Shame there's no 5-30 or 5-40

0-20 and 5-20 are a joke
Guess you won't like the 0w-8 that's out now. shake head


I got 3 cars, 3 different oil weight spec.
0w-20, 5w-20, 5w-30

to keep life a bit simpler I run 5w-30 in the 5w-20 spec vehicle.
All have VVT... the 5w-30 is no problem for the 5w-20 spec motor, it was implemented to improve MPG.
Far as flow and wear, after 130k miles, the mpg difference is hardly noticeable. oil tests show no change in engine wear metals either.

My $.02
Last edited by Souka June 24, 2025 at 12:16 PM.
Jun 24, 2025 07:20 PM
218 Posts
Joined Dec 2010
tmonyJun 24, 2025 07:20 PM
218 Posts
Quote from ArseneWenger :
The higher end "Edge" line is also the same price for 0W-20.
Link?
Jun 24, 2025 08:29 PM
655 Posts
Joined Dec 2012
fsu67Jun 24, 2025 08:29 PM
655 Posts
my car is leaking oil and I don't use full synthetic anymore because it leaks out much faster when I do, started using blend and I noticed the difference. someday I'll fix that rear main seal! 😆
1
1
Jun 24, 2025 09:02 PM
55 Posts
Joined Jan 2022
SociableSeed594Jun 24, 2025 09:02 PM
55 Posts
Quote from looser24 :
Here's a wild idea, maybe you should use the oil specs that your owners manual says to use.
The oil specs your manual says to use are literally to maximize fuel efficiency and they prioritize that over engine longevity.
2
Jun 24, 2025 11:17 PM
515 Posts
Joined Jun 2011
robvasJun 24, 2025 11:17 PM
515 Posts
Quote from Souka :
Guess you won't like the 0w-8 that's out now. shake headI got 3 cars, 3 different oil weight spec.0w-20, 5w-20, 5w-30to keep life a bit simpler I run 5w-30 in the 5w-20 spec vehicle.All have VVT... the 5w-30 is no problem for the 5w-20 spec motor, it was implemented to improve MPG.Far as flow and wear, after 130k miles, the mpg difference is hardly noticeable. oil tests show no change in engine wear metals either.My $.02
Have a Honda not a Toyota so they want 0W-16

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Jun 25, 2025 03:30 AM
464 Posts
Joined Feb 2010
allusucJun 25, 2025 03:30 AM
464 Posts
Is this better than Valvoline restore and protect? It's $30 at Walmart

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