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frontpagephoinix | Staff posted Today 07:27 PM
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frontpagephoinix | Staff posted Today 07:27 PM

5-Qt Castrol GTX Full Synthetic Motor Oil (5W-20)

w/ S&S

$19

$25

24% off
Amazon
7 Comments 2,052 Views
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Deal Details
Amazon has 5-Quart Castrol GTX Full Synthetic Motor Oil (5W-20) for $20.37 - 5% ($1.02) when you check out via Subscribe & Save = $19.35. Shipping is free with Prime or on $35+ orders.

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 Deal Hunter phoinix for finding this deal.

Product Description:
  • 6X better wear protection on critical engine parts than industry standards**
  • 1.3X better sludge protection than industry standards*
  • 3X Stronger against viscosity breakdown than leading full synthetic^
  • Protection for 10,000 miles between oil changes
  • Meets or exceeds the following specifications: API SP/SN PLUS/SN | ILSAC GF-6 | Meets Ford WSS-M2C945-B1 | Meets Ford WSS-M2C960-A1 |

Editor's Notes

Written by SubZero5 | Staff
  • About this Deal:
    • This offer matches the recent FP deal.
    • Our research indicates that this offer is $4.61 lower (19.2% savings) than the next best available price from a reputable merchant with prices starting from $23.96.
  • About this Product:
    • Rating of 4.9 stars overall from over 1,900 customer ratings.
  • About this Store:

Original Post

Written by phoinix | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Amazon has 5-Quart Castrol GTX Full Synthetic Motor Oil (5W-20) for $20.37 - 5% ($1.02) when you check out via Subscribe & Save = $19.35. Shipping is free with Prime or on $35+ orders.

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 Deal Hunter phoinix for finding this deal.

Product Description:
  • 6X better wear protection on critical engine parts than industry standards**
  • 1.3X better sludge protection than industry standards*
  • 3X Stronger against viscosity breakdown than leading full synthetic^
  • Protection for 10,000 miles between oil changes
  • Meets or exceeds the following specifications: API SP/SN PLUS/SN | ILSAC GF-6 | Meets Ford WSS-M2C945-B1 | Meets Ford WSS-M2C960-A1 |

Editor's Notes

Written by SubZero5 | Staff
  • About this Deal:
    • This offer matches the recent FP deal.
    • Our research indicates that this offer is $4.61 lower (19.2% savings) than the next best available price from a reputable merchant with prices starting from $23.96.
  • About this Product:
    • Rating of 4.9 stars overall from over 1,900 customer ratings.
  • About this Store:

Original Post

Written by phoinix | Staff

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7 Comments

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Today 07:54 PM
2,338 Posts
Joined Oct 2008
asukaToday 07:54 PM
2,338 Posts
API SP for $19 is not a good deal anymore. Pay the extra few bucks and get an API SQ oil.

I will never again run below SQ on any car with a turbo and/or timing chain. The data shows it is going to add longevity.

I am totally confident enough to say I have bought my last jug of Rotella T6 even.
1
2
Today 08:05 PM
21,741 Posts
Joined Nov 2007
Buckeyefan 1Today 08:05 PM
21,741 Posts

Our community has rated this post as helpful. If you agree, why not thank Buckeyefan 1

This is group 3, which is a synthetic blend in most other countries. If you want true synthetic, get a group 4 oil. European spec is always group 4.
Last edited by Buckeyefan 1 April 2, 2026 at 01:10 PM.
1
Today 09:25 PM
2,155 Posts
Joined Jul 2008
kfunk7Today 09:25 PM
2,155 Posts
Quote from Buckeyefan 1 :
This is group 3, which is a synthetic blend in most other countries. If you want true synthetic, get a group 4 oil. European spec is always group 4.
It is indeed a group 3 oil.
Today 09:36 PM
1,847 Posts
Joined Jun 2010
Wolf1eToday 09:36 PM
1,847 Posts
Quote from asuka :
API SP for $19 is not a good deal anymore. Pay the extra few bucks and get an API SQ oil.

I will never again run below SQ on any car with a turbo and/or timing chain. The data shows it is going to add longevity.

I am totally confident enough to say I have bought my last jug of Rotella T6 even.
Uhh..API? Sq? @_@ 😅
Today 09:49 PM
2,276 Posts
Joined Jun 2013
koge811Today 09:49 PM
2,276 Posts
im just going to ignore manufactures recommendation for 0-20 and use 5-30 instead its getting too thin and not protecting the bearings.
Today 10:03 PM
2,929 Posts
Joined May 2018
TimlessToday 10:03 PM
2,929 Posts
Quote from koge811 :
im just going to ignore manufactures recommendation for 0-20 and use 5-30 instead its getting too thin and not protecting the bearings.
Straight 40 is what real men run.
Today 10:03 PM
2,929 Posts
Joined May 2018
TimlessToday 10:03 PM
2,929 Posts
Quote from asuka :
API SP for $19 is not a good deal anymore. Pay the extra few bucks and get an API SQ oil.

I will never again run below SQ on any car with a turbo and/or timing chain. The data shows it is going to add longevity.

I am totally confident enough to say I have bought my last jug of Rotella T6 even.
Where is this data?

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