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phoinix | Staff 12.8K Views
Apr 18, 2026 1:34 AM

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

$14

$24

41% off
w/ S&Sat Amazon
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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 - $0.75 (5%) when you check out via Subscribe & Save = $14.20. Shipping is free with Prime or on $35+ orders.

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.
  • Note: Availability for pickup may vary by location.
Thanks to Deal Hunter phoinix for finding this deal.

Product Details:
  • 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 Neo45 | Staff
  • About this deal:
    • Our research indicates that this deal is $8.76 less (38.2% savings) than the next best available price from a reputable merchant with prices starting from $22.96 at the time of this post.
    • The price for this deal matches the previous Frontpage Deal.
  • About this store:
  • Additional notes:
    • Please see the original post for additional details & give the wiki and additional forum comments a read for helpful discussion.

Original Post

Written by phoinix | Staff
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 - $0.75 (5%) when you check out via Subscribe & Save = $14.20. Shipping is free with Prime or on $35+ orders.

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.
  • Note: Availability for pickup may vary by location.
Thanks to Deal Hunter phoinix for finding this deal.

Product Details:
  • 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 Neo45 | Staff
  • About this deal:
    • Our research indicates that this deal is $8.76 less (38.2% savings) than the next best available price from a reputable merchant with prices starting from $22.96 at the time of this post.
    • The price for this deal matches the previous Frontpage Deal.
  • About this store:
  • Additional notes:
    • Please see the original post for additional details & give the wiki and additional forum comments a read for helpful discussion.

Original Post

Written by phoinix | Staff

Community Voting

Deal Score
+37
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Why are you downvoting this deal?

Top Comments

Community Reviews

Castrol GTX High Mileage 5W 20 synthetic blend is a budget oil change option for drivers who still stick to short intervals or need a basic high mileage fill. The price is close to store brand synthetic, but still lands well below local auto parts pricing, and the listing is for a four pack of five quart bottles. The main drawback is that it is only a synthetic blend, with full synthetic alternatives like Kirkland or Costco often called out as better value and protection. A practical pick if you want inexpensive oil in bulk and do not mind the blend formula.

Common Questions (5)

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36 Comments

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Apr 18, 2026 1:42 AM
882 Comments
Joined Sep 2008
dogeatdogApr 18, 2026 1:42 AM
882 Comments

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

Costco has a 4 pack for $54
1
Apr 18, 2026 1:42 AM
63 Comments
Joined Nov 2018
BryanB6613Apr 18, 2026 1:42 AM
63 Comments

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

Just buy any cheap synthetic for $2more. Base oils are much better than this crap. Or buy this and change out before 4k miles since sheer gets out of control imo
2
Apr 18, 2026 6:16 AM
369 Comments
Joined Jul 2024
ScarletClub661Apr 18, 2026 6:16 AM
369 Comments
this is basically what the auto parts stores in my area already charge for this. so basically inferior oil for full price! 🙄
1
Apr 18, 2026 10:03 AM
436 Comments
Joined Mar 2009
pc800vaApr 18, 2026 10:03 AM
436 Comments
10w-30 is also available for the same price with S&S
2
Apr 18, 2026 11:33 AM
784 Comments
Joined Nov 2020
UniqueMagic721Apr 18, 2026 11:33 AM
784 Comments
Pro tip: While this has nearly identical packaging and labeling as Cascade complete liquid dishwashing soap, DO NOT put Castrol in your automatic dishwasher or vice versa.
2
3
Apr 18, 2026 11:57 AM
184 Comments
Joined Jan 2026
ThriftyPaylessApr 18, 2026 11:57 AM
184 Comments
Quote from UniqueMagic721 View quoted comment :
Pro tip: While this has nearly identical packaging and labeling as Cascade complete liquid dishwashing soap, DO NOT put Castrol in your automatic dishwasher or vice versa.
Same for Penzoil and Mazola, but Penzoil is good on popcorn.
2
1
Apr 18, 2026 12:37 PM
488 Comments
Joined Apr 2018
ShrewdFriction889Apr 18, 2026 12:37 PM
488 Comments
Quote from dogeatdog View quoted comment :
Costco has a 4 pack for $54
And the oil Costco is selling is FULL synthetic.

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Apr 18, 2026 12:49 PM
4.6K Comments
Joined Nov 2013
luckydog97Apr 18, 2026 12:49 PM
4.6K Comments
Unless your car burns or leaks oil rapidly, don't buy this.

Its well worth the very marginal additional cost to use full synthetic, which offers reliably better protection.

There's barely any regulation on a synthetic "blend"…could barely be better than conventional.

Regular oil changes with quality full synthetic oil and a quality filter will save you thousands in engine issues over the life of the vehicle.
1
Apr 18, 2026 12:50 PM
142 Comments
Joined Mar 2020
PurpleScent2237Apr 18, 2026 12:50 PM
142 Comments
Synthetic blend
1
Apr 18, 2026 2:07 PM
546 Comments
Joined Jun 2011
robvasApr 18, 2026 2:07 PM
546 Comments
Quote from ScarletClub661 View quoted comment :
this is basically what the auto parts stores in my area already charge for this. so basically inferior oil for full price! 🙄
What? Autozone wants $30.99 for this same thing.
Apr 18, 2026 2:08 PM
546 Comments
Joined Jun 2011
robvasApr 18, 2026 2:08 PM
546 Comments
Advance Auto has it on closeout for $14.95
https://shop.advanceautoparts.com...10629395-P
Apr 18, 2026 8:12 PM
217 Comments
Joined Feb 2016
CyanTheoryApr 18, 2026 8:12 PM
217 Comments
+1 for Costco oil
Apr 19, 2026 12:08 AM
288 Comments
Joined Nov 2018
FlyNHiApr 19, 2026 12:08 AM
288 Comments
Question for the SDers on this comment line. Before i voted not a great deal .. Thgere were 12 comment and 8 upvotes.. How does this rating and posting work like this when all the comment are MEH and it had 8 upvotes?? Hmmmm SD?
Apr 19, 2026 4:44 AM
102 Comments
Joined Jan 2020
KingofswingApr 19, 2026 4:44 AM
102 Comments
Quote from CyanTheory View quoted comment :
+1 for Costco oil
I just picked up some since it's on sale. I've been using it for over 5 years with no problems.

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Apr 19, 2026 6:29 AM
45 Comments
Joined Feb 2011
crazy-legsApr 19, 2026 6:29 AM
45 Comments
Great price. 👍
1

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