Is Castrol GTX Full Synthetic 5W-20 right for my car?

Use it if your owner's manual calls for 5W-20 and an API SP or ILSAC GF-6 oil. It also carries Ford approvals WSS-M2C945-B1 and WSS-M2C960-A1, so many Ford engines are covered.

How often should I change it?

Castrol rates it for up to 10,000 miles between changes. Follow your owner's manual, and shorten the interval for severe driving such as towing or lots of short trips.

How does it compare with Mobil 1 or Pennzoil Platinum?

It meets the same API SP and GF-6 standards but sits in a value tier. Premium synthetics generally claim more extended-drain and deposit protection; GTX covers the basics well.

Can I use it in a diesel engine?

No. It is not diesel compatible and is intended for gasoline four-cycle automotive engines.

Four one-quart bottles of Castrol GTX Full Synthetic 5W-20 motor oil, enough for one typical oil change with some left over.

Does it have a warranty?

Castrol does not list a written warranty for this oil. Your engine warranty depends on following the manufacturer's oil spec and change intervals.

What do buyers say about the Castrol GTX Full Synthetic Motor Oil 4 Pack?

Buyers like: Works well in specific vehicles (e.g., 2017 Jeep Wrangler JK Unlimited); Keeps SUV running smoothly and clean; Consistent performance with oil changes every 5k miles.

Castrol GTX Full Synthetic Motor Oil 4 Price History: Lowest $35.88

Q: Where is the Castrol GTX Full Synthetic Motor Oil 4 Pack cheapest?

At Walmart, for $35.88, as of our latest check.

What reviewers say

Owners describe consistent, smooth performance in vehicles such as a 2017 Jeep Wrangler JK when oil is changed around every 5,000 miles. Praise centers on clean running and steady behavior rather than dramatic gains.

What people mention

Engine smoothnessPraisedOwners say engines run smoothly and stay clean with regular changes.
ConsistencyPraisedBuyers report steady performance across repeated 5,000-mile oil changes.
Vehicle fitPraisedUsers single out good results in vehicles like a 2017 Jeep Wrangler JK.
Drain intervalMixedThe 10,000-mile claim draws little owner feedback; most change closer to 5,000 miles.

From Walmart

6X better wear protection on critical engine parts than industry standards
1.3X better sludge protection than industry standards
3X stronger against viscosity breakdown than leading full synthetic (based on Kurt Orbahn test in 5W-30 grade)
Protection for 10,000 miles between oil changes
Meets or exceeds API SP/SN PLUS/SN and ILSAC GF-6
Meets Ford WSS-M2C945-B1 and Ford WSS-M2C960-A1

Sizes: 1 Quart
Returns: Free 90-day returns
Shipping: Free shipping; arrives today, as soon as 13 mins; sold and shipped by Walmart.com
Packs: Single, 2 pack, 3 pack, 4 pack and 5 pack offered
In the box: 4-pack of Castrol GTX Full Synthetic 5W-20 Motor Oil, 1 Quart

About the Castrol GTX Full Synthetic Motor Oil 4 Pack

Castrol GTX Full Synthetic is a 5W-20 motor oil for 4-cycle automotive engines. It comes as a pack of four 1-quart bottles. It is an OEM replacement oil for Ford vehicles and is not diesel compatible.

The formula gives 6X better wear protection on critical engine parts and 1.3X better sludge protection than industry standards. It provides protection for 10,000 miles between oil changes.

It meets or exceeds API SP/SN PLUS/SN and ILSAC GF-6. It also meets Ford WSS-M2C945-B1 and Ford WSS-M2C960-A1.