Castrol GTX Full Synthetic High Mileage 5W-30 Motor Oil, 5 Quarts
Castrol GTX Full Synthetic High Mileage 5W-30 Motor Oil, 5 Quarts
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Castrol GTX Full Synthetic High Mileage 5W-30 Motor Oil, 5 Quarts

|24 ratings

Key item features

  • Emission System Safeguard: Features Phosphorous Replacement Technology designed to help prevent catalytic converter and emission system failures, ensuring long-term vehicle health.
  • Enhanced Wear Defense: Delivers significantly enhanced wear protection, offering 6 times better performance than the established industry standard.
  • Optimal Burn-off Control: Provides exceptional oil burn-off protection that surpasses current industry standards, reducing consumption and maintaining oil levels.
  • Extended Service Life: Formulated to provide reliable protection for an extended period, allowing for up to 10,000 miles between oil changes.
  • Targeted Vehicle Design: Specially engineered as a full synthetic motor oil to meet the unique needs of vehicles with over 75,000 miles.
  • Comprehensive Critical Protection: Offers superior protection across 7 critical areas, including effective corrosion prevention, sludge control, and reduced timing and friction wear.
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Current price is $29.97$5.99/qt
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Customer ratings & reviews

4.9 out of 5 stars
stars
24 ratings11 reviews
How item rating is calculated
  1. 5 stars96% (23)
  2. 4 stars0% (0)
  3. 3 stars4% (1)
  4. 2 stars0% (0)
  5. 1 star0% (0)
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Showing 1-3 of 11 reviews

Apr 21, 2026
Reviewer name: Andrew
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Good oil

Good oil. I've always had a good experience with Castrol. It could be my imagination, but the valve train always seems to be a bit quieter with Castrol vs other brands.

Incentivized Review
Helpful?7CBUO2VTAB6116042263521
Jun 3, 2026
Reviewer name: Elizabeth
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great oil and delivery

Great oil at a great price. I was unable to get to the store but needed the oil. It was delivered to my home the day after the order was placed. I'm very pleased with both the product and the quickness of delivery.

Incentivized Review
Helpful?7CBUO2VTAB6116042263521
Mar 25, 2026
Reviewer name: Payton
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great Oil! Purchasing more!

Started using this on my 03 Mitsubish Montero for high mileage purposes %26 to stop burning gas so quickly. Seems to be doing the job!

Incentivized Review
Helpful?7CBUO2VTAB6116042263521