Castrol GTX Diesel Protects Against Wear Deposits Motor Oil 15W-40, 1 Gallon
Castrol GTX Diesel Protects Against Wear Deposits Motor Oil 15W-40, 1 Gallon
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Castrol GTX Diesel Protects Against Wear Deposits Motor Oil 15W-40, 1 Gallon

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Key item features

  • Engine Protection: Protects against oil thickening and deposit build-up in critical engine parts, guarding against wear and deposits for reliable engine protection.
  • Viscosity Stability: Provides better shear stability and protection against viscosity loss, maintaining consistent engine performance.
  • Versatile Application: Ideal for use in mixed fleets, enabling product rationalization for workshops and lowering stock costs.
  • Advanced Formulation: Conforms to the strict requirements of PC-11 engine oil technology, suitable for diesel engines requiring API CK-4, CJ-4, and below.
  • Broad Compatibility: Can be used in a wide variety of heavy-duty, commercial vehicles and pickup trucks.
  • Engine Cleanliness: Specially formulated to keep the engine cleaner, contributing to prolonged engine life.
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Current price is $17.8213.9 ¢/fl oz
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4.9 out of 5 stars
stars38 ratings9 reviews
How item rating is calculated
  1. 5 stars95% (36)
  2. 4 stars3% (1)
  3. 3 stars3% (1)
  4. 2 stars0% (0)
  5. 1 star0% (0)
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Showing 1-3 of 9 reviews

Feb 27, 2026
Sheri
Item details
Size: 1 gal
5 out of 5 stars review

Verified Purchase

Great product!

We use this in our Diesel truck and it is great!

Incentivized Review
Helpful?7EIXRXS49T2J142520388
Jan 20, 2026
aerolite53
Item details
Size: 1 gal
5 out of 5 stars review

Verified Purchase

There is a reason the GTX line of oil is always sold out. It's simply great oil.

Incentivized Review
Helpful?7EIXRXS49T2J142520388
Jan 31, 2026
Michael
Item details
Size: 1 gal
5 out of 5 stars review

Verified Purchase

Good slippery oil

Good slippery oil what can I say

Incentivized Review
Helpful?7EIXRXS49T2J142520388