15% OFF ORDERS $35+ | 20% OFF $100+ | ONLINE ONLY
USE CODE
HOLIDAYSAVE
*
Exclusions apply.
Advance Auto Parts Logo
Choose a Store
  • Shop All
  • Replacement Parts
  • Performance Parts
  • Accessories
  • Oil & Fluids
  • Special Offers
  • Speed Perks
  • Advice & How-Tos
  • Project Guides
  • FAQ / Help Desk
Loading...
Share
Product thumb
Product thumb
Product thumb
Product thumb
Product thumb
Product thumb
Product thumb
Product thumb
Product main large
Loading...
How Would You Like To Get This Item?

Store Pickup

Loading...Loading...Loading...

Same Day Home Delivery

Loading...Loading...Loading...

Home Delivery

Loading...Loading...Loading...
Loading...

Save Up To $20 On Oil Change Bundles

Select Oil + ANY Oil Filter

Loading...
Loading...Loading...Loading...Loading...Loading...

Product Information

Product Details
Part No. 15B6E6
Warranty Details (30 DAY REPLACEMENT IF DEFECTIVE)
Castrol® GTX® High Mileage 5W-20 Synthetic Blend Motor Oil is the ultimate choice for extending engine life in high-mileage vehicles. Engineered with advanced Phosphorus Replacement Technology, it safeguards emission systems by reducing catalytic converter damage. This premium synthetic blend offers superior dispersancy to combat sludge buildup, exceptional protection against oil burn-off, and advanced additives to minimize engine wear. Seal conditioners work to reduce leaks, while its formulation improves fuel economy, meeting stringent API SP, ILSAC GF-6, and Ford specifications. Designed to exceed industry standards, this 5W-20 motor oil ensures reliable performance and durability, making it a smart investment for maintaining your vehicle's efficiency and longevity.

Product Features:


    Product Features:
    • Phosphorus Replacement Technology helps extend emission system life
    • Superior dispersancy that fights sludge build up
    • Exceptional oil burn-off protection exceeding industry standards (1)
    • Seal conditioners to help reduce leaks
    • Advanced additives that minimize engine wear
    • Improved fuel economy (2)
    • (2) Based on API and ACEA volatility specifications
    • (2) 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
    • Meets Ford WSS-M2C945-B1
    • Meets Ford WSS-M2C960-A1
Specifications
Container Size:
1 qt

Oil Class:
Standard
Loading...
Loading...Loading...Loading...Loading...Loading...
Loading...
Loading...
Loading...Loading...Loading...Loading...Loading...
No results
Loading...
Loading...Loading...Loading...Loading...Loading...
Feedback
Be The First To Know About Deals And Promotions.
Plus, create an account to receive $5 off of $20 or more.
TOP REPLACEMENT PARTS
Brake Pads & Shoes
Brake Rotors
Alternators
Water Pumps
Starters
Brake Calipers

Order Lookup

Help Desk

Store Locator

In Store Services

Mobile App

CUSTOMER SUPPORT
Accessibility Statement
Contact Us
Forgot Password
Help Desk
In Store Pickup
In Store Services
Order Tracking
Recall Information
Return Policy
Same Day Delivery
© 2025 Advance Auto Parts
Privacy Policy
Terms of Use
Site Map
ADVANCING A WORLD IN MOTION®