castrol gtx full synthetic high mileage motor oil 5w-20, 6 pack, 1 us qt bottles front-facing view of a six-pack retail box labeled Castrol GTX Full Synthetic High Mileage 5W-20 with one 1 US qt bottle beside it showing the Castrol logo, 5W-20 viscosity and "Full Synthetic High Mileage" text on a white background; suitable for topping off engine oil in vehicles with over 75,000 miles and often used for routine oil changes.
Castrol GTX Full Synthetic High Mileage Motor Oil 5W-20, 6 pack, 1 US qt bottles
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GTX FULL SYNTHETIC HM

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

|20 ratings

Smart summary

Generated by AI
  • Over 75,000 Miles

    Over 75,000 Miles

    This synthetic oil is made specifically to keep older engines running smoothly.
  • Protects Catalytic Converters

    Protects Catalytic Converters

    Low-phosphorus formula prevents damage to your vehicle's sensitive emission system.
  • Fights Oil Burn-Off

    Fights Oil Burn-Off

    Active additives protect against oil burning and leaks common in older cars.
  • Includes Six Quarts

    Includes Six Quarts

    You get six individual quart bottles, enough for a complete oil change.

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 "
Current price is $34.68
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Columbus, 43215
Arrives by Tomorrow
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Order within 12 hr 13 min
Return or replace anytime.
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Castrol GTX Full Synthetic High Mileage Motor Oil 0W-20, 6 pack, 1 US qt bottles $34.68

Castrol GTX Full Synthetic High Mileage Motor Oil 0W-20, 6 pack, 1 US qt bottles
current price $34.68

Castrol GTX Full Synthetic High Mileage Motor Oil 0W-20, 6 pack, 1 US qt bottles

4.8 out of 5 stars
4.8 out of 5 Stars. 15 reviews
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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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Key specifications

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
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20 ratings5 reviews
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  1. 5 stars90% (18)
  2. 4 stars5% (1)
  3. 3 stars0% (0)
  4. 2 stars0% (0)
  5. 1 star5% (1)
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Showing 1-3 of 5 reviews

Oct 7, 2026
Reviewer name: Rosso
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Helps the car stay running like a top

I've been using this oil for a while now and the car still runs like it was new. 178,000 miles on this car and you'd never guess.

Helpful?61RYLMZC4K8616559621388
May 21, 2026
Reviewer name: BeeJay
5 out of 5 stars
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
Reviewer name: Tami G
5 out of 5 stars
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
Current price is $34.68
Prices may vary in club and online
How do you want your item?

Shipping

Free for Plus on eligible orders over $50
Columbus, 43215
Arrives by Tomorrow
.
Order within 12 hr 13 min
Return or replace anytime.

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