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🛠️ Keep your classic engine roaring with Castrol’s legendary protection!
Castrol GTX Classic 20W-50 is a premium conventional motor oil designed specifically for classic, muscle, and performance engines. Its high zinc and phosphorus content provides superior wear protection for engines with high tension valve springs and performance modifications. This oil maintains a thick, durable film under severe conditions, resists foaming and thermal breakdown, and is compatible with gasoline and alcohol-based fuels. Ideal for push-rod and flat tappet engines, it meets API SJ standards and comes in a convenient 6-quart pack trusted by thousands of automotive enthusiasts.
| ASIN | B093RT3B1W |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #5,693 in Automotive ( See Top 100 in Automotive ) #90 in Motor Oils |
| Brand | Castrol |
| Brand Name | Castrol |
| Compatible with Vehicle Type | push-rod, flat tappet engines and performance cam applications |
| Container Type | Bottle |
| Customer Reviews | 4.8 out of 5 stars 1,625 Reviews |
| Global Trade Identification Number | 00079191218914 |
| Included Components | Motor Oil |
| Item Type Name | Motor Oil |
| Liquid Volume | 6 quarts |
| Manufacturer | Castrol |
| Manufacturer Part Number | 15E809 |
| Manufacturer Warranty Description | 12 months |
| Model Number | 15E809 |
| Package Information | Bottle |
| SAE J300 Viscosity Grade | 20W-50 |
| Size | 1 Quart, Pack of 6 |
| UPC | 079191218914 |
| Unit Count | 192 Fluid Ounces |
| Vehicle Service Type | push-rod, flat tappet engines and performance cam applications |
| Viscosity Level | High |
J**L
Convenience of shopping on line! Good price!
Quality product, good price!
M**E
Great choice for older vehicles
High zinc oil is recommended for older vehicles with flat tappet valve lifters. Using in 97 jeep 4.0 engine. Runs quiet and smooth in S.C. summer heat. Do not add any other zinc additives when using this oil as too much is not advisable.
J**K
High Zinc!
Perfect oil for old motorcycles.
P**B
Good stuff
The good stuff.
J**L
Castrol
Good oil and good price
L**E
Awesome Performance – Perfect for Lawn Equipment
I’ve been using Castrol GTX Classic 20W-50 in my lawn equipment, and it’s been absolutely great. It provides solid protection, smooth operation, and helps extend the life of my mower and trimmer. This oil is especially good for older engines or small engines that run hot and need a thicker oil. The only downside is that it’s hard to find in stores, so I usually have to order it online. But when I can get it, it’s worth every penny. If you're maintaining older engines or heavy-duty lawn tools, this oil is a reliable choice. Highly recommended!
N**H
has what I needed for older Flat tappet cam/lifters
was what I wanted wish was offered in 10/40 but is cheaper than buying additional additives.
R**.
Castrol 20W-50 Conventional Motor oil
Item is great for my engine! Great for older classic engines! Would buy again!
Trustpilot
1 month ago
2 weeks ago