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expiredRokket | Staff posted May 24, 2026 02:59 AM
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expiredRokket | Staff posted May 24, 2026 02:59 AM

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

w/ S&S

$14

$32

56% off
Amazon
18 Comments
9,806 Views
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Deal Details
Amazon has 5-qt Castrol GTX High Mileage Synthetic Blend Motor Oil (10W-30) 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 Rokket 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 Rokket | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has 5-qt Castrol GTX High Mileage Synthetic Blend Motor Oil (10W-30) 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 Rokket 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 Rokket | Staff

Community Voting

Deal Score
+50
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Top Comments

JAX-FL
528 Posts
187 Reputation
Thats because this isnt not a bad deal.com nor not too amazing.com. Is it slick though? Id say yes, but only because its oil. nyuck nyuck.Big GrinBig Grin

18 Comments

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May 24, 2026 04:06 AM
26 Posts
Joined Apr 2026
SharpManatee101May 24, 2026 04:06 AM
26 Posts
It's not a bad deal but not too amazing either
May 24, 2026 12:50 PM
528 Posts
Joined Aug 2010
JAX-FLMay 24, 2026 12:50 PM
528 Posts
Quote from SharpManatee101 :
It's not a bad deal but not too amazing either
Thats because this isnt not a bad deal.com nor not too amazing.com. Is it slick though? Id say yes, but only because its oil. nyuck nyuck.Big GrinBig Grin
Last edited by JAX-FL May 24, 2026 at 06:01 AM.
5
May 24, 2026 04:21 PM
2,875 Posts
Joined Aug 2016
MX400ex72May 24, 2026 04:21 PM
2,875 Posts
Got one for the mowers. Quick google search suggest small engines may benefit from a syn blend more so than full syn.

Either way, it's going in the mower, which likely doesn't care much what oil you put in it.
May 24, 2026 08:28 PM
1,125 Posts
Joined Nov 2015
bilderbergMay 24, 2026 08:28 PM
1,125 Posts
Meh deal for a blend. But like MX400 said, good for lawn equipment.
May 25, 2026 05:05 PM
512 Posts
Joined Jan 2015
san-melMay 25, 2026 05:05 PM
512 Posts
Good enough.
May 25, 2026 05:13 PM
20 Posts
Joined Mar 2026
FairMustang164May 25, 2026 05:13 PM
20 Posts
just ok deal
May 25, 2026 05:45 PM
714 Posts
Joined Dec 2012
fsu67May 25, 2026 05:45 PM
714 Posts
Looks like a pretty good deal, I haven't seen too many blends on sale. I have an older truck with a few leaks and this is what I use, I don't know why when I use full synthetic it leaks much worse.

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May 25, 2026 05:53 PM
178 Posts
Joined Aug 2018
GreyTent1404May 25, 2026 05:53 PM
178 Posts
no matter what, it is most important that you actually change your oil. The type is the least important
May 25, 2026 06:05 PM
1,998 Posts
Joined Dec 2007
AssaultLifeMay 25, 2026 06:05 PM
1,998 Posts
Good deal.
May 25, 2026 07:14 PM
6,641 Posts
Joined Mar 2011
ballershanelleMay 25, 2026 07:14 PM
6,641 Posts
Quote from fsu67 :
Looks like a pretty good deal, I haven't seen too many blends on sale. I have an older truck with a few leaks and this is what I use, I don't know why when I use full synthetic it leaks much worse.
. Convention would be better and just change like we always 3k miles
2
May 25, 2026 10:47 PM
714 Posts
Joined Dec 2012
fsu67May 25, 2026 10:47 PM
714 Posts
Quote from ballershanelle :
. Convention would be better and just change like we always 3k miles
I still change it at 3,000 even though it's blend, it's really hard to find a conventional 10W30 5qt jug at this price
May 26, 2026 06:34 PM
82 Posts
Joined Mar 2017
MacaraMay 26, 2026 06:34 PM
82 Posts
Nice deal
May 27, 2026 05:18 PM
230 Posts
Joined Oct 2025
SiennaAlpaca1565May 27, 2026 05:18 PM
230 Posts
Quote from GreyTent1404 :
no matter what, it is most important that you actually change your oil. The type is the least important
Exactly. I've almost never cared what oil I use so long as I change it regularly. All my vehicles make it to 300,000 I get rid of them because I'm tired of looking at them or I get rear-ended.
May 27, 2026 05:20 PM
230 Posts
Joined Oct 2025
SiennaAlpaca1565May 27, 2026 05:20 PM
230 Posts
Quote from bilderberg :
Meh deal for a blend. But like MX400 said, good for lawn equipment.
Hardly matters what you put this in since it's happy it has an oil change.

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May 27, 2026 05:28 PM
230 Posts
Joined Oct 2025
SiennaAlpaca1565May 27, 2026 05:28 PM
230 Posts
Quote from fsu67 :
Looks like a pretty good deal, I haven't seen too many blends on sale. I have an older truck with a few leaks and this is what I use, I don't know why when I use full synthetic it leaks much worse.
Full synthetic is smaller on a molecular level. Just like you must have imagined since it does leak out faster. High mileage oils have additional additive in them that is supposed to help swell rubber seals. Not all gaskets just some of the rubber seals. This may possibly slow down your leak depending on how bad it is. Full synthetic which won't be high mileage, pretty much for this reason will dump right out of an older vehicle with leaky seals. I've almost always been happy with nonsynthetics and frequent oil changes. If I run a full synthetic I still change the oil early then others do at about 5000 miles and it hurts me every moment after 3000 to watch the gauge.

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