Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
  1. Deal Image
Item 1 of 2
  1. Deal Image
  2. Deal Image
Item 1 of 2
popularAmusedPolice6755 posted Aug 2, 2026 8:39 PM

Castrol GTX Full Synthetic 5W-20 Motor Oil, 5 Quarts, Pack of 3 $71.85

$72

Amazon
7 Comments
3.9K Views
Get Deal at Amazon
Deal Details
https://www.amazon.com/dp/B09M96GF28

Not the amazing deal, but it is decent for current market of full synthetic oil.
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
https://www.amazon.com/dp/B09M96GF28

Not the amazing deal, but it is decent for current market of full synthetic oil.

Community Voting

Deal Score
+8
Good Deal
Get Deal at Amazon

Join The Conversation

Share your experience with the Slickdeals community

Share information with the community. Please follow our Community Guidelines and be kind!

7 Comments

Sign up for a Slickdeals account to remove this ad.

Aug 2, 2026 10:47 PM
1.4K Comments
Joined Mar 2009
kgorillaAug 2, 2026 10:47 PM
1.4K Comments
Not sure what the appeal is here, supertech is still less than $20 and GTX is their entry level synthetic, EDGE is the higher end Castrol.
Aug 3, 2026 10:41 AM
11 Comments
Joined Jul 2016
blakef223Aug 3, 2026 10:41 AM
11 Comments
Quote from kgorilla :
Not sure what the appeal is here, supertech is still less than $20 and GTX is their entry level synthetic, EDGE is the higher end Castrol.
Supertech is $24.88 for 5w20 right now. Where are you seeing it under $20?
Original Poster
Aug 3, 2026 7:16 PM
21 Comments
Joined Sep 2024
AmusedPolice6755
Original Poster
Aug 3, 2026 7:16 PM
21 Comments
Quote from kgorilla :
Not sure what the appeal is here, supertech is still less than $20 and GTX is their entry level synthetic, EDGE is the higher end Castrol.
Yeah that used to be the go to.. now it's less than $25.. might as well get 3 jugs of this for $72.
Aug 5, 2026 11:54 PM
358 Comments
Joined Jan 2011
dexter9999Aug 5, 2026 11:54 PM
358 Comments
"Full synthetic" doesn't mean what it used to mean.
Aug 6, 2026 5:20 AM
1.1K Comments
Joined Nov 2016
MeshcaAug 6, 2026 5:20 AM
1.1K Comments

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

Quote from dexter9999 :
"Full synthetic" doesn't mean what it used to mean.
And what does it mean now?
1
Aug 7, 2026 11:44 AM
8 Comments
Joined Apr 2017
Randy6001414Aug 7, 2026 11:44 AM
8 Comments
If you subscribe its 68 bucks
Today 6:18 PM
788 Comments
Joined Dec 2015
BesserToday 6:18 PM
788 Comments
That's not a deal 3pk 5quarts for $70 something dollars nawhhhhh

Join The Conversation

Share your experience with the Slickdeals community

Share information with the community. Please follow our Community Guidelines and be kind!

Related Searches

AutosMotor OilFree ShippingMotor OilCastrolAmazon