Castrol GTX High Mileage 5W-30 Motor Oil, 6-Pack
Where to Buy
| Retailer | Price | Last seen | Buy |
|---|---|---|---|
R Rural King | $5.99 | Oct 30, 2026 | Buy Now |
 Walmart 90-day returns (in store too) | $6.48 | Jun 9, 2023, may have changed | Buy Now |
Z Zoro Tools Industrial Supplies | $9.07 | Aug 15, 2022, may have changed | Buy Now |
A Allendale True Value | $9.99 | Jan 19, 2023, may have changed | Buy Now |
S Summit Racing | $9.99 | Dec 1, 2024, may have changed | Buy Now |
Prices are collected from retailer listings; each row shows the date we last saw that price. Return and shipping terms are each store's standard policy from our retailer research (April 2026). Some products and categories have different terms, so check with the store before you buy.
Used & Refurbished
✨ See 1 used & refurbished price with ShopSavvy ProGet the app →Price history summary
Lowest new price we recorded at major retailers (Amazon, Walmart, Best Buy, Target, The Home Depot and Lowes) in the last 90 days: $6.48 at Walmart on Oct 30, 2026.
Range over the last 12 months: $6.48 (Walmart, Oct 30, 2026) to $59.35 (Amazon, Aug 29, 2026). The lowest current offer at these retailers, $24.45 at Amazon, is 277% above its 90-day low. Based on 117 recorded prices since Nov 8, 2025 for offers sold by these retailers themselves (not marketplace sellers). Summary as of Oct 31, 2026.
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Pros
- •Reviewers consistently report smooth, dependable engine performance in both newer and high-mileage vehicles, including one with roughly 130,000 miles.
- •The high-mileage formula is credited with helping reduce oil burning and leaks, though results vary by engine.
- •Its synthetic-blend formulation helps keep engines cleaner by reducing sludge buildup.
- •Users report strong acceleration and reliable operation over extended use.
- •It has been used successfully in cars, a pickup truck, a classic performance vehicle, and a generator when 5W-30 oil was specified.
- •Several reviewers say its performance compares favorably with more expensive oils.
- •Long-term users praise its consistent results and say they would purchase it again.
- •Multiple viscosities are available across the product line, making it easier to match the oil to a vehicle’s requirements.
Cons
- •This is a synthetic blend, not a full-synthetic oil, so buyers seeking maximum full-synthetic performance should look elsewhere.
- •You must confirm that your vehicle requires SAE 5W-30 and meets the manufacturer’s required certifications before using it.
- •Reported improvements in oil consumption, leak prevention, and engine longevity are based on individual experiences and are not guaranteed for every vehicle.
- •The six 1-quart bottles are convenient for topping off or smaller oil capacities, but a larger container may be more practical for some oil changes.
Bottom Line
Castrol GTX High Mileage 5W-30 is a solid, cost-conscious choice for engines that specifically call for 5W-30, with reviewers highlighting cleaner operation, smooth performance, and reduced oil consumption in some aging vehicles. It is especially appealing for high-mileage cars, but check your owner’s manual and do not mistake enthusiastic user experiences for a guarantee that this oil will fix leaks or add years to every engine.
What Reviewers Are Saying
📚More About Castrol GTX High Mileage 5W-30 Motor Oil, 6-Pack
Discussion
ShopSavvy compares prices across thousands of retailers so you always get the best deal. Prices are collected from retailer listings, and each one shows the date we last saw it. Our expert reviews and community discussion help you make informed buying decisions.