Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts
Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts
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Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts

|1,071 ratings
Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 QuartsCastrol GTX High Mileage 10W 30 Synthetic Blend Motor Oil 5 Quarts3 pack Castrol GTX High Mileage 10W 30 Synthetic Blend Motor Oil 5 Quarts2 pack Castrol GTX High Mileage 10W 30 Synthetic Blend Motor Oil 5 Quarts4 pack Castrol GTX High Mileage 10W 30 Synthetic Blend Motor Oil 5 Quarts
Pack SizeSingle
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Key item features

  • Mileage Optimization: Specifically formulated for vehicles with over 75,000 miles, this synthetic blend motor oil helps extend engine life.
  • Emission Protection: Features Phosphorus Replacement Technology to reduce harmful phosphorus, protecting the catalytic converter and extending emission system life.
  • Sludge Defense: Offers superior dispersancy to effectively fight against sludge buildup within the engine.
  • Wear Prevention: Contains advanced additives that work to minimize engine wear, including protection against timing and friction wear.
  • Leak Reduction: Includes seal conditioners designed to help reduce and prevent leaks in high mileage engines.
  • Fuel Efficiency: Provides improved fuel economy in 10W-30 grades, meeting industry specifications.
  • Industry Compliance: Meets or exceeds API SP/SN PLUS/SN/SM and ILSAC GF-6 specifications for performance and protection.
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Specs

Motor oil type, Synthetic Blend Motor OilsMotor oil viscosity, 10W - 30Has high mileage additives, YProduct line, GTX High MileageVolume capacity, 5 qtFeatures, Extended Engine Life

About this item

Product details

Castrol® GTX® High Mileage 10W-30 is specially formulated for vehicles with over 75,000 miles. It's a synthetic blend motor oil that helps extend engine life providing Superior Protection in 7 Critical Areas including corrosion prevention, sludge control, timing and friction wear. It also contains a proprietary additive to protect the emisssion system. Our Phosphorus Replacement Technology reduces harmful phosphorus to protect the catalytic converter and help extend the life of your high mileage vehicle.
  • Phosphorus Replacement Technology helps extend emission system life
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards*
  • Seal conditioners to help reduce leaks
  • Advanced additives that minimize engine wear
  • Improved fuel economy**
  • * Based on API and ACEA volatility specifications
  • ** In 5W-20, 5W-30 and 10W-30 grades versus industry specifications
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SN/SM
  • ILSAC GF-6
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.  

Specifications

Motor oil type

Synthetic Blend Motor Oils

Motor oil viscosity

10W - 30

Has high mileage additives

Y

Product line

GTX High Mileage

Warranty

Warranty information

See product for details

Warnings

Customer ratings & reviews

4.8 out of 5 stars
stars
1,071 ratings368 reviews
How item rating is calculated
  1. 5 stars89% (949)
  2. 4 stars7% (78)
  3. 3 stars2% (19)
  4. 2 stars1% (7)
  5. 1 star2% (18)
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Showing 1-3 of 368 reviews

Aug 31, 2026
Reviewer name: John
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Best choice for an old truck

I've been using Castrol 20w30 in my 1993 pickup for years. The truck still uses no oil and think Castrol provides the best protection for the engine. I change the oil and filter every 3,000 miles.

Helpful?3fb40090-bb13-11f1-a662-695ec49556ce5212541314
Aug 10, 2026
Reviewer name: C
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Quality oil

Less expensive than anywhere else.

Helpful?3fb40090-bb13-11f1-a662-695ec49556ce5212541314
Dec 10, 2025
Reviewer name: doug11c
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Slow is smooth! And Smooth is FAST

I love this oil! I've used it in almost every vehicle I've owned when the mileage has been 90'000 and above! It keeps my vehicles running longer and smoother! Oil change intervals are not as soon, and seems to increase performance some! Again all of these oils are the same, even made by the same companies, just put different names on the labels! I highly recommend Castrol GTX, I go with what I've used and what I know, and I know this is one of the best! Buy it!

Helpful?3fb40090-bb13-11f1-a662-695ec49556ce5212541314
Current price is $23.9715.0 ¢/fl oz
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