Castrol GTX Classic 20W-50 contains a typical Zinc level of 1310 ppm and a typical Phosphorus level of 1199 ppm.

Deliver to Vietnam

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

Castrol GTX Classic 20W-50 Conventional Motor Oil, 1 Quart, Pack of 6

Castrol GTX Classic 20W-50 Conventional Motor Oil, 1 Quart, Pack of 6

Q: Is this good with a turbo car, Will this oil work well with a 86 Buick turbo car with no catalytic converter

Just my opinion but with a turbo spinning 80k rpm I would be hesitant using 20w50. I would use a lighter weight like 10w40 or less. If you didn't have a turbo I would say it would be fine because you don't have a catalytic converter to foul up.

Q: Can this be used for a air cooled 1970 vw beetle?

Thank you for contacting Castrol North America. Castrol GTX Classic 20W-50 is specially formulated to provide unsurpassed wear protection for classic and collector cars as well as racing applications. Castrol GTX Classic 20W-50 is a new high-performance conventional oil formula for push-rod, flat tappet engines, and performance cam applications. It’s blended with high zinc (1400 ppm) and phosphorus content to help prevent premature aging, wear, and metal fatigue on engines with high tension valve springs or performance modifications that create high contact pressure and extreme internal temperatures. Specially formulated engine oil for classic/collector cars, muscle cars, hot rods, and race cars. Castrol GTX Classic 20W-50 is suitable for use in automotive gasoline engines where the manufacturer recommends an API SJ or earlier specification 20W-50 lubricant. NOTE: NOT FOR USE IN MODERN ENGINES WITH CATALYTIC CONVERTERS OR WET CLUTCH APPLICATIONS. Thank you again for contacting Castrol, we value your patronage! Castrol Consumer Relations

Q: What are your thoughts on using this in mowers, generators and pressure washers where a 20W-50 is acceptable?

Castrol GTX Classic 20W-50 is a conventional four-stroke motor oil that can be used in applications calling for a 20W-50 motor oil with an API rating of SJ or prior as long as the application it is used in should not use motor oil with high zinc content. This formula should not be used in modern engines with catalytic converters or wet clutch applications.

Product ID: 317127891

Secure Transaction

Details

Viscosity
20W-50
Brand
Castrol
Vehicle Service Type
push-rod flat
UPC
079191218914
Automotive Fit Type
Universal Fit

🔥Thick oil film withstands severe heat

⚙️Compatible with gasoline & alcohol fuels

🛡️High Zinc & Phosphorus for extreme wear protection

Description

🛠️ Keep your classic engine roaring with Castrol GTX Classic – where vintage power meets modern protection!

FUEL COMPATIBILITY - Works seamlessly with both gasoline and alcohol-based fuels, offering versatile protection for diverse engine types.
FOAM FREE PERFORMANCE - Minimal foaming guarantees smooth lubrication and reduces engine stress during intense driving conditions.
ULTIMATE ENGINE DEFENSE - High zinc and phosphorus formula guards against premature wear and metal fatigue, perfect for high-performance engines.
HEAT RESISTANT VISCOSITY - Maintains a tough, thick oil film even under extreme temperatures, ensuring consistent engine protection.
PROVEN INDUSTRY STANDARD - Meets or exceeds API SJ specifications, trusted by collectors and muscle car enthusiasts alike.

Castrol GTX Classic 20W-50 Conventional Motor Oil is a premium, high-zinc formula designed for collector cars, muscle cars, and performance engines. Its thick, heat-resistant oil film and minimal foaming properties provide superior wear protection under extreme conditions. Compatible with gasoline and alcohol fuels, it meets API SJ standards, making it the go-to choice for maintaining vintage and high-tension valve spring engines.

Specifications

Viscosity	20W-50 sae_grade
Brand	Castrol
Vehicle Service Type	push-rod, flat tappet engines and performance cam applications
UPC	079191218914
Automotive Fit Type	Universal Fit
Global Trade Identification Number	00079191218914
Manufacturer	Castrol
Size	1 Quart, Pack of 6
Model	GTX Classic 20W-50 Conventional
Item Weight	12.38 pounds
Package Dimensions	9.5 x 9 x 8 inches
Item model number	15E809
Manufacturer Part Number	15E809

Have a Question? See What Others Asked

How much zinc ppm?

Is this good with a turbo car, Will this oil work well with a 86 Buick turbo car with no catalytic converter

Can this be used for a air cooled 1970 vw beetle?

What are your thoughts on using this in mowers, generators and pressure washers where a 20W-50 is acceptable?

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products