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SUCHaDEAL 8.1K Views
Jun 23, 2026 10:18 AM

Prime Members: 5-Qt Castrol GTX Full Synthetic Motor Oil

from $19.35

+ Free S&Hat Amazon
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Amazon has for Prime Members: Select 5-Qt Castrol GTX Full Synthetic Motor Oil from $19.35 when you checkout w/ Subscribe & Save. Shipping is free.

Note: You have the flexibility to manage your Subscribe & Save subscription at any time after your order ships. View Subscribe & Save filler items and our current Subscribe & Save Frontpage deals to unlock up to extra 15% savings when you have 5 or more items in your current monthly subscription.

Thanks to Community Member SUCHaDEAL for posting this deal.

Editor's Notes

Written by powerfuldoppler | Staff
  • About this deal:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • About this store:

Original Post

Written by SUCHaDEAL
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has for Prime Members: Select 5-Qt Castrol GTX Full Synthetic Motor Oil from $19.35 when you checkout w/ Subscribe & Save. Shipping is free.

Note: You have the flexibility to manage your Subscribe & Save subscription at any time after your order ships. View Subscribe & Save filler items and our current Subscribe & Save Frontpage deals to unlock up to extra 15% savings when you have 5 or more items in your current monthly subscription.

Thanks to Community Member SUCHaDEAL for posting this deal.

Editor's Notes

Written by powerfuldoppler | Staff
  • About this deal:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • About this store:

Original Post

Written by SUCHaDEAL

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20 Comments

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Jun 24, 2026 12:24 PM
3K Comments
Joined Oct 2008
asukaJun 24, 2026 12:24 PM
3K Comments
Syn blend meets Chrysler MS-6395, but for some reason full synthetic does not.
2
Jun 25, 2026 4:55 PM
848 Comments
Joined Oct 2011
markng25Jun 25, 2026 4:55 PM
848 Comments
No 0W-16 :-(
Jun 25, 2026 5:09 PM
394 Comments
Joined Nov 2014
JellyJelly22Jun 25, 2026 5:09 PM
394 Comments
Quote from markng25 View quoted comment :
No 0W-16 :-(
I used 0w-20 for 0w-16, nothing wrong
1
1
Jun 25, 2026 5:27 PM
317 Comments
Joined Nov 2017

This comment has been rated as unhelpful by Slickdeals users.

Jun 25, 2026 5:35 PM
30 Comments
Joined Jul 2022
BearMech13Jun 25, 2026 5:35 PM
30 Comments
Time to change the oil.
Jun 25, 2026 6:10 PM
387 Comments
Joined Feb 2009
jvinhj240Jun 25, 2026 6:10 PM
387 Comments
When it comes to oils, everyone is an expert.
1
Jun 25, 2026 6:55 PM
1.1K Comments
Joined May 2021
JollyReward108Jun 25, 2026 6:55 PM
1.1K Comments
The Tucson wants 5-20 but the Hellcat wants 0-40.
1

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Jun 25, 2026 7:02 PM
25 Comments
Joined Apr 2013
AntPalJun 25, 2026 7:02 PM
25 Comments
Not approved for Defender 130 P400
Jun 25, 2026 7:37 PM
520 Comments
Joined May 2005
nhbillyJun 25, 2026 7:37 PM
520 Comments
Quote from JellyJelly22 View quoted comment :
I used 0w-20 for 0w-16, nothing wrong
and I use 0w-30 for my ride during the summer and 0w-20 for the winter.
Jun 25, 2026 7:44 PM
17 Comments
Joined May 2013
danimelaraJun 25, 2026 7:44 PM
17 Comments
I only use 20W-105 for absolute best protection during summer and 10W-55 in winter time.
I have been using this in my hybrid for the last 2 days. Nothing has happened.
1
Jun 25, 2026 7:58 PM
108 Comments
Joined Jan 2021
Zippity58Jun 25, 2026 7:58 PM
108 Comments
great price for full synthetic
Jun 25, 2026 9:25 PM
52 Comments
Joined Feb 2016
SDBryanJun 25, 2026 9:25 PM
52 Comments
Quote from harsh28 View quoted comment :
You can't say nothing wrong. Just wait and watch. It's not about IF it will damage the engine but when.
Toyota states 0w-16 is recommended but they say in the manual you can use 0w-20 it will just lose some fuel efficiency, and to use 16 in the next oil change. Other countries for the exact same engine Toyota uses 5w-30. Its all an EPA fuel efficiency game. Technically using thinner oils which 0w-16 is, is more likely to cause wear on engine components than thicker.
Jun 25, 2026 9:35 PM
394 Comments
Joined Nov 2014
JellyJelly22Jun 25, 2026 9:35 PM
394 Comments
Quote from SDBryan View quoted comment :
Toyota states 0w-16 is recommended but they say in the manual you can use 0w-20 it will just lose some fuel efficiency, and to use 16 in the next oil change. Other countries for the exact same engine Toyota uses 5w-30. Its all an EPA fuel efficiency game. Technically using thinner oils which 0w-16 is, is more likely to cause wear on engine components than thicker.
agreed. I had a car that had an oil burning issue while using the recommended 0W-20. I switched to 5W-30, and the oil consumption basically disappeared.
It seems like a lot of modern cars are designed very thin oils mainly to squeeze out a little better fuel economy and meet emissions standards. While thin oil works fine, it actually burn much more easily than a thicker oil.
Jun 25, 2026 10:15 PM
372 Comments
Joined Jun 2016
inspirashunJun 25, 2026 10:15 PM
372 Comments
thin oil will also suffer worse from fuel dilution as the motor ages. not sure how much mpg impact youll see at 0w16 vs 0w30/5w30/etc would be neat to see a comparison

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Jun 25, 2026 10:17 PM
1.3K Comments
Joined Sep 2010
printer88Jun 25, 2026 10:17 PM
1.3K Comments
Quote from JellyJelly22 View quoted comment :
agreed. I had a car that had an oil burning issue while using the recommended 0W-20. I switched to 5W-30, and the oil consumption basically disappeared.It seems like a lot of modern cars are designed very thin oils mainly to squeeze out a little better fuel economy and meet emissions standards. While thin oil works fine, it actually burn much more easily than a thicker oil.
Kia or Subaru ?

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