GTX FULL SYNTHETIC HM

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

|18 ratings
Item # 990440312
Current price is $29.98
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Smart summary

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  • Convenient Packaged Oil: This product is Castrol GTX Full Synthetic High Mileage Motor Oil, specifically the 5W-20 viscosity grade, supplied in a 6-pack of 1 US quart bottles.
  • High Mileage Engineering: Engineered as a full synthetic motor oil, it is specifically designed for vehicles that have accumulated over 75,000 miles.
  • Proprietary Phosphorus Reduction: Features Phosphorous Replacement Technology, a proprietary additive specifically formulated to reduce phosphorus levels.
  • Catalytic Converter Care: The reduction of phosphorus, facilitated by its unique formulation, helps to protect catalytic converters and extend the lifespan of emission systems.
  • Comprehensive Engine Defense: Delivers enhanced protection for the engine, actively guarding against common issues such as wear, oil leaks, excessive oil burn-off, and the accumulation of power-robbing deposits.

Castrol GTX Full Synthetic High Mileage Motor Oil 5W-30, 6 pack, 1 US qt bottles $29.98

Castrol GTX Full Synthetic High Mileage Motor Oil 5W-30, 6 pack, 1 US qt bottles
current price $29.98

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

4.8261 out of 5 Stars. 23 reviews
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Castrol GTX Full Synthetic High Mileage Motor Oil 5W-20, 6 pack, 1 US qt bottles
Castrol GTX Full Synthetic High Mileage Motor Oil 5W-20, 6 pack, 1 US qt bottles
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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.
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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

4.7 out of 5 stars
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18 ratings4 reviews
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  2. 4 stars6% (1)
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  5. 1 star6% (1)
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Showing 1-3 of 4 reviews

May 21, 2026
BeeJay
5 out of 5 stars review

Verified Purchase

Increased gas milage

Heavy duty farm truck average milage increased by 6%.

Helpful?61RYLMZC4K8616559621388
Nov 14, 2025
Tami G
5 out of 5 stars review

Verified Purchase

F-150 Oil Change

Easy to use bottles. No over spills. Runs great in my F-150

Helpful?61RYLMZC4K8616559621388
Mar 11, 2026
Alan
5 out of 5 stars review

Verified Purchase

Great value

Great value

Helpful?61RYLMZC4K8616559621388

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