Castrol GTX High Mileage 10W-40 Synthetic Blend Motor Oil, 5 Quarts
Castrol GTX High Mileage 10W-40 Synthetic Blend Motor Oil, 5 Quarts
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Castrol GTX High Mileage 10W-40 Synthetic Blend Motor Oil, 5 Quarts

4.8 stars out of 528 reviews
(4.8)|
528 ratings
Castrol GTX High Mileage 10W-40 Synthetic Blend Motor Oil, 5 QuartsCastrol GTX High Mileage 10W 40 Synthetic Blend Motor Oil 5 Quarts4 pack Castrol GTX High Mileage 10W 40 Synthetic Blend Motor Oil 5 Quarts5 pack Castrol GTX High Mileage 10W 40 Synthetic Blend Motor Oil 5 Quarts2 pack Castrol GTX High Mileage 10W 40 Synthetic Blend Motor Oil 5 Quarts3 pack Castrol GTX High Mileage 10W 40 Synthetic Blend Motor Oil 5 Quarts
Pack Size:Single
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Key item features

  • Mileage Formulation: This 10W-40 synthetic blend motor oil is specifically formulated for vehicles with over 75,000 miles, making it the leading consumer high-mileage brand.
  • Emission Protection: Features Phosphorus Replacement Technology and a proprietary additive to reduce harmful phosphorus, protecting the catalytic converter and extending emission system life.
  • Sludge Defense: Offers superior dispersancy to actively fight against sludge buildup, contributing to a cleaner engine.
  • Leak Reduction: Contains seal conditioners designed to help reduce leaks, a common issue in high-mileage engines.
  • Engine Longevity: Provides superior protection in seven critical areas, including corrosion prevention, sludge control, timing, and friction wear, to help extend engine life.
  • Burn-off Control: Delivers exceptional oil burn-off protection that exceeds current industry standards based on API and ACEA volatility specifications.
  • Industry Compliant: Meets or exceeds several industry specifications, including API SP/SN PLUS/SN/SM, ensuring broad compatibility and performance.
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Current price is $20.9713.1 ¢/fl oz
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Castrol GTX High Mileage 10W-40 Synthetic Blend Motor Oil, 5 Quarts
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Comparison Chart:
Motor oil viscosity10W - 40Castrol GTX High Mileage 10W-40 Synthetic Blend Motor Oil, 5 Quarts10W - 40Mobil 1 High Mileage Full Synthetic Motor Oil 10W-40, 5 Quart5W - 30Castrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 5 Quarts10W - 40Castrol Actevo 4T 10W-40 Part Synthetic Motorcycle Oil, 1 Quart10W - 30Super Tech All Mileage Synthetic Blend Motor Oil SAE 10W-30, 5 Quarts
Motor oil typeSynthetic Blend Motor OilsCastrol GTX High Mileage 10W-40 Synthetic Blend Motor Oil, 5 QuartsFull Synthetic Motor OilsMobil 1 High Mileage Full Synthetic Motor Oil 10W-40, 5 QuartSynthetic Blend Motor OilsCastrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 5 QuartsSynthetic Blend Motor OilsCastrol Actevo 4T 10W-40 Part Synthetic Motorcycle Oil, 1 QuartSynthetic Blend Motor OilsSuper Tech All Mileage Synthetic Blend Motor Oil SAE 10W-30, 5 Quarts
Rec. useAutomotiveCastrol GTX High Mileage 10W-40 Synthetic Blend Motor Oil, 5 QuartsAutomotiveMobil 1 High Mileage Full Synthetic Motor Oil 10W-40, 5 QuartAutomotiveCastrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 5 QuartsMotorcycleCastrol Actevo 4T 10W-40 Part Synthetic Motorcycle Oil, 1 QuartAutomotiveSuper Tech All Mileage Synthetic Blend Motor Oil SAE 10W-30, 5 Quarts
Volume capacity5 qtCastrol GTX High Mileage 10W-40 Synthetic Blend Motor Oil, 5 Quarts160 fl ozMobil 1 High Mileage Full Synthetic Motor Oil 10W-40, 5 Quart5 qtCastrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 5 Quarts1 qtCastrol Actevo 4T 10W-40 Part Synthetic Motorcycle Oil, 1 Quart5 qtSuper Tech All Mileage Synthetic Blend Motor Oil SAE 10W-30, 5 Quarts
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Customer ratings & reviews

4.8 out of 5 stars
stars528 ratings109 reviews
How item rating is calculated
  1. 5 stars88% (467)
  2. 4 stars6% (32)
  3. 3 stars2% (12)
  4. 2 stars1% (7)
  5. 1 star2% (10)

Reviews summary

Pros
  • : Offers good value for product quality.
  • : Made for older engines.
  • : Effective for engines with high mileage.
  • : Provides quiet operation with reduced engine noise.
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Showing 1-3 of 109 reviews

Aug 10, 2020
Bill
5 out of 5 stars review

Verified Purchase

excellent product for high mileage engines

I started using this motor oil in my 2001 Ford Explorer last year. My rig has 234,000 miles on it so I believe the sealants and other detergents are vital and offer the best protection I can get for the price. It also works to quiet my tired old engine. I team this up with a high mileage filter also.

Helpful?3P3DF66MLKMO5265104269
Nov 24, 2025
MARK
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

The Best Automotive Oil

I have been using Castrol GTX since it first came out and I used to work at my Dads Foreign Car Repair Shop in 1968-1972. We specialized in Jaguar, Alfa Romeo, Ferrarri, Porsche, MG and Austin Healey. The only oil you need!

Helpful?3P3DF66MLKMO5265104269
Jun 17, 2025
Okaylupe
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Great upgrade to older engine oil

Better alternative for an older engine with higher mileage that requires 5w-30 this one is thicker and keeps the engine running smooth after so many miles.

Helpful?3P3DF66MLKMO5265104269