GTX Full Synthetic HM

Castrol GTX Full Synthetic High Mileage Motor Oil 5W-30, 6 pack, 1 US qt bottles

|26 ratings
Item # 990440316
Current price is $34.48
Prices may vary in club and online
How do you want your item?

Shipping

Free for Plus on eligible orders over $50
Columbus, 43215
Return or replace anytime.
Sam's credit card
Get a $30 statement credit¹ when you open an account 9/1-9/30/26 + learn how to earn 10% back on fuel for a limited time‡ See details

Smart summary

Generated by AI
  • Mileage Optimized: Specifically engineered as a full synthetic motor oil, formulated for vehicles that have accumulated over 75,000 miles to cater to their unique engine needs.
  • Catalytic Safe: Incorporates Phosphorous Replacement Technology, a proprietary additive designed to actively reduce the level of phosphorus within the oil.
  • Emission System Defense: This advanced formulation helps to safeguard the catalytic converter and significantly extend the overall life of the vehicle's emission system.
  • Comprehensive Engine Defense: Delivers enhanced protection against various engine challenges including wear, oil leaks, excessive oil burn-off, and formation of power-robbering deposits.
  • Full Synthetic: This product is a full synthetic motor oil, providing superior lubrication characteristics and stability under diverse operating conditions.
  • Optimal Viscosity: Features a 5W-30 viscosity grade, ensuring appropriate flow and protection across a broad spectrum of engine temperatures.
  • Multi-Pack Volume: Available in a convenient 6-pack configuration, with each bottle containing 1 US quart for practical storage and use.
We also recommend

Castrol GTX Full Synthetic High Mileage Motor Oil 5W-20, 6 pack, 1 US qt bottles $34.48

Castrol GTX Full Synthetic High Mileage Motor Oil 5W-20, 6 pack, 1 US qt bottles
current price $34.48

Castrol GTX Full Synthetic High Mileage Motor Oil 5W-20, 6 pack, 1 US qt bottles

4.7368 out of 5 stars
4.7368 out of 5 Stars. 19 reviews
Sponsored
castrol gtx full synthetic high mileage motor oil 5w-30, 6 pack, 1 us qt bottles front-facing shot of a 6-pack cardboard carton and a single 1‑quart silver plastic bottle with black cap; carton and bottle labels show Castrol logo, 'GTX Full Synthetic High Mileage' and '5W-30' text, red 6-pack banding and handling icons visible, suitable for vehicles with over 75,000 miles.
Castrol GTX Full Synthetic High Mileage Motor Oil 5W-30, 6 pack, 1 US qt bottles
Hero image 0 of Castrol GTX Full Synthetic High Mileage Motor Oil 5W-30, 6 pack, 1 US qt bottles, 0 of 10

About this item

Product details

Castrol GTX Full Synthetic High Mileage is a full synthetic oil engineered specifically for vehicles with over 75,000 miles. It is formulated with Phosphorous Replacement Technology, a proprietary additive that reduces the level of phosphorus, which is harmful to catalytic converters and can shorten emission system life. It provides enhanced protection against wear, leaks, oil burn off and power robbing deposits.
info:
If the item details above aren't accurate or complete, we want to know about it. 

Specifications

  • • Phosphorous Replacement Technology helps prevent catalytic converter and emission system failure
  • • 6X better wear protection than the industry standard
  • • Exceptional oil burn-off protection exceeding industry standards*
  • • Protects for up to 10,000 miles between oil changes**
  • • Also suitable for hybrids (0W grades)
  • * Based on API and ACEA volatility specifications
  • **Up to 10,000 miles or 1 year, whichever comes first
  • "Meets or exceeds the following specifications: • API SP/SN PLUS/SN • ILSAC GF-6 • Meets Ford WSS-M2C961-A1 "

Member ratings & reviews

4.8 out of 5 stars
stars
26 ratings7 reviews
Write a review
  1. 5 stars96% (25)
  2. 4 stars0% (0)
  3. 3 stars0% (0)
  4. 2 stars0% (0)
  5. 1 star4% (1)
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 7 reviews

Aug 19, 2026
Reviewer name: Anthony
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Saving money to save and keep your automobile

If you like to save money and enjoy quality Here is the product Full Synthetic at this price helps

Helpful?0TNEMYLPST7D16624005001
Apr 12, 2026
Reviewer name: Jose G
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

castrol

Great Product at great Price

Helpful?0TNEMYLPST7D16624005001
Jul 13, 2026
Reviewer name: NotNow
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

oil for SUV

great price and great item

Helpful?0TNEMYLPST7D16624005001

Related pages