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frontpage Posted by ArseneWenger • 16h ago
frontpage Posted by ArseneWenger • 16h ago

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

w/ Subscribe & Save

$20

$26

23% off
Amazon
15 Comments 5,586 Views
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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

Deal Score
+27
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Top Comments

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

14 Comments

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8h ago
3,912 Posts
Joined Aug 2011

This comment has been rated as unhelpful by Slickdeals users.

8h ago
97 Posts
Joined Nov 2014
8h ago
jard1s
8h ago
97 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.
8h ago
1,334 Posts
Joined Oct 2016
8h ago
looser24
8h ago
1,334 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.
6
2
1
6h ago
716 Posts
Joined Nov 2012
6h ago
slickbanger
6h ago
716 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👌
5
Original Poster
Pro
6h ago
2,966 Posts
Joined Feb 2011
6h ago
ArseneWenger
6h ago
Original Poster
Pro
2,966 Posts
The higher end "Edge" line is also the same price for 0W-20.
5h ago
919 Posts
Joined May 2007
5h ago
goixiz
5h ago
919 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
5h ago
428 Posts
Joined Jun 2011
5h ago
robvas
5h ago
428 Posts
Shame there's no 5-30 or 5-40

0-20 and 5-20 are a joke
1
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5h ago
342 Posts
Joined Apr 2010
5h ago
rs21
5h ago
342 Posts
Walmart price is $21.03, https://www.walmart.com/ip/Castro...om=/search

Will get it from walmart
4h ago
44 Posts
Joined Jul 2022
4h ago
PurpleLadybug1016
4h ago
44 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
4h ago
1,242 Posts
Joined Sep 2011
4h ago
Souka
4h ago
1,242 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.
4h ago
187 Posts
Joined Dec 2010
4h ago
tmony
4h ago
187 Posts
Quote from ArseneWenger :
The higher end "Edge" line is also the same price for 0W-20.
Link?
2h ago
558 Posts
Joined Dec 2012
2h ago
fsu67
2h ago
558 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! 😆
2h ago
29 Posts
Joined Jan 2022
2h ago
SociableSeed594
2h ago
29 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.
4m ago
429 Posts
Joined Jun 2011
4m ago
robvas
4m ago
429 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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