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expiredpennysave posted Jun 30, 2026 3:28 AM

5-Qt Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil

$14

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Deal Details
Amazon has 5-Quart Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil on sale for $14.95 - 5% when you check out via Subscribe & Save = $14.20. Shipping is free with Prime or on $35+ orders.Thanks to Community Member pennysave for finding this deal.

Alternatively, Select Advance Auto Parts Stores also have 5-Quart Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil on sale for $14.95. Select free store pickup where stock permits.

About this Item:
  • Phosphorus Replacement Technology helps extend emission system life
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards* | Seal conditioners to help reduce leaks
  • Advanced additives that help prevent engine wear | Improved Fuel Economy**
  • Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM | ILSAC GF-6 | Meets Ford WSS-M2C945-B1 | Meets Ford WSS-M2C960-A1 |* Based on API and ACEA volatility specifications | ** In 5W-20, 5W-30 and 10W-30 grades versus industry specifications

Editor's Notes

Written by Corwin | Staff

Original Post

Written by pennysave
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has 5-Quart Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil on sale for $14.95 - 5% when you check out via Subscribe & Save = $14.20. Shipping is free with Prime or on $35+ orders.Thanks to Community Member pennysave for finding this deal.

Alternatively, Select Advance Auto Parts Stores also have 5-Quart Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil on sale for $14.95. Select free store pickup where stock permits.

About this Item:
  • Phosphorus Replacement Technology helps extend emission system life
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards* | Seal conditioners to help reduce leaks
  • Advanced additives that help prevent engine wear | Improved Fuel Economy**
  • Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM | ILSAC GF-6 | Meets Ford WSS-M2C945-B1 | Meets Ford WSS-M2C960-A1 |* Based on API and ACEA volatility specifications | ** In 5W-20, 5W-30 and 10W-30 grades versus industry specifications

Editor's Notes

Written by Corwin | Staff

Original Post

Written by pennysave

Community Voting

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16 Comments

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Jun 30, 2026 6:03 AM
81 Comments
Joined Dec 2007
dbishop23Jun 30, 2026 6:03 AM
81 Comments
Good deal
Jun 30, 2026 7:40 AM
368 Comments
Joined Oct 2014
freakyfabeJun 30, 2026 7:40 AM
368 Comments
Good price and I know it'll get used. Thxs OP.
Jun 30, 2026 8:29 AM
2.7K Comments
Joined Oct 2008
asukaJun 30, 2026 8:29 AM
2.7K Comments
Wow, an API SQ syn blend. Tempting...

Perfect for a lot of Hemi V8's.
Jun 30, 2026 7:27 PM
25 Comments
Joined Feb 2019
ricky1928Jun 30, 2026 7:27 PM
25 Comments
in for two thanks
Jun 30, 2026 11:39 PM
227 Comments
Joined Apr 2022
GreyGiraffe5236Jun 30, 2026 11:39 PM
227 Comments
In for one
Jul 1, 2026 12:21 AM
4.2K Comments
Joined Dec 2013
adirondackmanJul 1, 2026 12:21 AM
4.2K Comments
Synthetic "Blend"
2
Jul 1, 2026 12:44 AM
312 Comments
Joined Jul 2014
Cam2020Jul 1, 2026 12:44 AM
312 Comments
Synthetic Blend is NOT FULLY SYNTHETIC oil.
1

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Jul 1, 2026 12:48 AM
304 Comments
Joined Feb 2022
BraveSummer7472Jul 1, 2026 12:48 AM
304 Comments
Quote from Cam2020 :
Synthetic Blend is NOT FULLY SYNTHETIC oil.
Still gets the car going. Better than no oil at all.
1
Jul 1, 2026 4:23 AM
312 Comments
Joined Jul 2014
Cam2020Jul 1, 2026 4:23 AM
312 Comments
Quote from BraveSummer7472 :
Still gets the car going. Better than no oil at all.
Yes indeed. But as long as you plan to change oil at 3000 miles.
Spend a little more and use Fully Synthetic, then you change the oil at 10,000 miles.

Do the math and see which is cheaper in the end, which is better for your car. (Make sure to include the price of filters too).
2
Jul 1, 2026 10:31 PM
107 Comments
Joined Dec 2024
HighFlightJul 1, 2026 10:31 PM
107 Comments
Good timing and best price. Ty.
Jul 2, 2026 11:16 PM
857 Comments
Joined Nov 2008
reapermanJul 2, 2026 11:16 PM
857 Comments
Quote from Cam2020 :
Yes indeed. But as long as you plan to change oil at 3000 miles.
Spend a little more and use Fully Synthetic, then you change the oil at 10,000 miles.

Do the math and see which is cheaper in the end, which is better for your car. (Make sure to include the price of filters too).
Go ahead and change your oil at 10k miles. Then do the math when your car pukes out. No vehicle should go 10k miles on a oil change.
Jul 4, 2026 8:31 AM
312 Comments
Joined Jul 2014
Cam2020Jul 4, 2026 8:31 AM
312 Comments
Quote from reaperman :
Go ahead and change your oil at 10k miles. Then do the math when your car pukes out. No vehicle should go 10k miles on an oil change.
How old are you?
Respectfully and obviously, it seems you have not had a new car in ages.
Unless you know better than Toyota's engineers or doubt Toyota's reputation and reliability, this is exactly what Toyota orders for an oil change. In fact, this is what millions of cars sold this year will have the scheduled oil change for the first two years by the dealer under ToyotaCare:

Engine oil and filter change every 10,000 miles (or 12 months)
So if your Toyota uses the standard synthetic-oil schedule, the free oil changes are usually performed at approximately:

10,000 miles
20,000 miles


You say you know better than TOYOTA? Then go to other manufacturers that do Factory Scheduled Oil Change at longer miles, when using their recommended FULLY SYNTHETIC oil.

But I do understand Old people who follow what they used to do decades back; however, please do NOT give wrong advice to others if you don't know enough. And yes, I am sorry if I don't believe what you suggest, based on your experience, over manufacturers.
1
Jul 4, 2026 11:56 AM
857 Comments
Joined Nov 2008
reapermanJul 4, 2026 11:56 AM
857 Comments
Quote from Cam2020 :
How old are you?
Respectfully and obviously, it seems you have not had a new car in ages.
Unless you know better than Toyota's engineers or doubt Toyota's reputation and reliability, this is exactly what Toyota orders for an oil change. In fact, this is what millions of cars sold this year will have the scheduled oil change for the first two years by the dealer under ToyotaCare:

Engine oil and filter change every 10,000 miles (or 12 months)
So if your Toyota uses the standard synthetic-oil schedule, the free oil changes are usually performed at approximately:

10,000 miles
20,000 miles


You say you know better than TOYOTA? Then go to other manufacturers that do Factory Scheduled Oil Change at longer miles, when using their recommended FULLY SYNTHETIC oil.

But I do understand Old people who follow what they used to do decades back; however, please do NOT give wrong advice to others if you don't know enough. And yes, I am sorry if I don't believe what you suggest, based on your experience, over manufacturers.
I'm old enough to have serviced a fleet of semi trucks for 35 years. And I just traded in my wife's 2022 vehicle for a new '26 just 3 weeks ago. Plus, Toyotas are great, in fact I have two of them. A 86' Hilux small pickup, and a 06 Tundra with the million mile 2UZFE, engine. The Toyotas of yesterday are better and more reliable than the current lineup, trust me. Hyundai has spent 5 Billion dollars replacing engines under warranty in most of their lineup from 2012- 2020 or so. Guess what, the engines that changed their oil more frequently than their 7500 mile recommendations weren't nearly as affected.

Plus many manufacturers have a clause stating in severe driving conditions, it may be necessary to change the oil more frequently, sometimes as often as every 3,000 to 5,000 miles.

Do as you wish, but as cheap and easy as a diy oil change is, I'll stick to my 4k intervals.

If you want to be a part of the oil geeks online visit bobistheoilguy.com
Last edited by reaperman July 4, 2026 at 05:01 AM.
1
Jul 4, 2026 6:33 PM
312 Comments
Joined Jul 2014
Cam2020Jul 4, 2026 6:33 PM
312 Comments
Quote from reaperman :
i'm old enough to have serviced a fleet of semi trucks for 35 years. and i just traded in my wife's 2022 vehicle for a new '26 just 3 weeks ago. plus, toyotas are great, in fact i have two of them. a 86' hilux small pickup, and a 06 tundra with the million mile 2uzfe, engine. the toyotas of yesterday are better and more reliable than the current lineup, trust me. hyundai has spent 5 billion dollars replacing engines under warranty in most of their lineup from 2012- 2020 or so. guess what, the engines that changed their oil more frequently than their 7500 mile recommendations weren't nearly as affected.

plus many manufacturers have a clause stating in severe driving conditions, it may be necessary to change the oil more frequently, sometimes as often as every 3,000 to 5,000 miles.

do as you wish, but as cheap and easy as a diy oil change is, i'll stick to my 4k intervals.

if you want to be a part of the oil geeks online visit bobistheoilguy.com

- 👍 .

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Jul 4, 2026 10:02 PM
55 Comments
Joined Mar 2023
DUSK77Jul 4, 2026 10:02 PM
55 Comments
Yep.. 10k reference by manufacturer lol... Pretty much says it all. Synthetic is not good for any motor. Oil is oil is oil... Wanna eat synthetic beef because your Dr says "you should, it'll make you live longer" ... Lol right, they thrive on their own failures.. wake up and grab what u can while u can... I'm jus sayin, eyes open autophiles

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