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expiredphoinix | Staff posted Apr 14, 2026 6:34 AM

5-qt Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil

$14

$24

41% off
w/ S&Sat Amazon
9.4K Views
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Deal Details
Amazon has 5-qt Castrol GTX High Mileage 10W-30 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 phoinix for finding this deal.

Features:
  • Phosphorus Replacement Technology extends emission system life
  • Superior dispersancy fights sludge build up inside engine
  • Seal conditioners help reduce oil leaks from aging gaskets
  • Advanced additives prevent engine wear and improve fuel economy
  • Meets API SP/SN PLUS/SN/SM and ILSAC GF-6 specifications

Editor's Notes

Written by megakimcheelove | Staff

Original Post

Written by phoinix | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has 5-qt Castrol GTX High Mileage 10W-30 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 phoinix for finding this deal.

Features:
  • Phosphorus Replacement Technology extends emission system life
  • Superior dispersancy fights sludge build up inside engine
  • Seal conditioners help reduce oil leaks from aging gaskets
  • Advanced additives prevent engine wear and improve fuel economy
  • Meets API SP/SN PLUS/SN/SM and ILSAC GF-6 specifications

Editor's Notes

Written by megakimcheelove | Staff

Original Post

Written by phoinix | Staff

Community Voting

Deal Score
+54
Good Deal
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7 Comments

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Apr 14, 2026 9:52 PM
149 Posts
Joined Feb 2017
lawrence1007Apr 14, 2026 9:52 PM
149 Posts
When you can buy full synthetic at this price why buy blend
1
Apr 14, 2026 9:57 PM
6,077 Posts
Joined Mar 2006
Core2QuadApr 14, 2026 9:57 PM
6,077 Posts
Quote from lawrence1007 :
When you can buy full synthetic at this price why buy blend
Where? The only deal around $14 I've seen is the costco 4x jug deals, but no 10W-30.
Last edited by Core2Quad April 14, 2026 at 03:02 PM.
Apr 16, 2026 10:47 AM
2,688 Posts
Joined Oct 2008
asukaApr 16, 2026 10:47 AM
2,688 Posts
Quote from Core2Quad :
Where? The only deal around $14 I've seen is the costco 4x jug deals, but no 10W-30.
Think the idea is that it's only about $10 more, which works out to $0.0034 per mile extra.

For me, it boils down to how long you plan to own it. Great oil if your car can support it and you're selling at the end of the warranty period.

Modern car, you're hoping will last hundreds of thousands of miles, with turbo and/or timing chain, I'd pay the extra and get an API SQ rated full synthetic.
Apr 16, 2026 5:09 PM
6,077 Posts
Joined Mar 2006
Core2QuadApr 16, 2026 5:09 PM
6,077 Posts
Quote from asuka :
Think the idea is that it's only about $10 more, which works out to $0.0034 per mile extra.

For me, it boils down to how long you plan to own it. Great oil if your car can support it and you're selling at the end of the warranty period.

Modern car, you're hoping will last hundreds of thousands of miles, with turbo and/or timing chain, I'd pay the extra and get an API SQ rated full synthetic.
Modern car's don't use 10W-30 though. This is for an older vehicle.

You can get full synthetic oil from Walmart though for $18 any day that is high mileage.

I do know on my older Lexus that ran 5W-30 that this particular oil stopped my oil leak. When I ran regular full synthetic the oil leak came back.
Apr 17, 2026 1:03 PM
1,150 Posts
Joined Aug 2018
Kraken09Apr 17, 2026 1:03 PM
1,150 Posts
Quote from lawrence1007 :
When you can buy full synthetic at this price why buy blend
I'd love a link to that deal. I need 0w20 so if you can find that at $14 I need to know.
Apr 18, 2026 3:34 AM
96 Posts
Joined Jan 2020
KushKing420Apr 18, 2026 3:34 AM
96 Posts
Quote from Kraken09 :
I'd love a link to that deal. I need 0w20 so if you can find that at $14 I need to know.
Costco has Kirkland brand 5 quarts for 15 on sale right now.
Apr 18, 2026 7:17 PM
1,150 Posts
Joined Aug 2018
Kraken09Apr 18, 2026 7:17 PM
1,150 Posts
Quote from KushKing420 :
Costco has Kirkland brand 5 quarts for 15 on sale right now.
If I had a membership it would be great but then it wouldn't really be $14.00. good deal though

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