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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 for vintage, muscle, and performance engines. Its high zinc and phosphorus content provides superior wear protection, especially for engines with high-tension valve springs and performance mods. The oil maintains a thick protective film under extreme heat and pressure, resists foaming, and is compatible with gasoline and alcohol fuels. Trusted by enthusiasts, it meets API SJ standards and comes in a convenient 5-quart jug.
| ASIN | B09QXWLY2Y |
| Best Sellers Rank | #4,620 in Automotive ( See Top 100 in Automotive ) #89 in Motor Oils |
| Brand Name | Castrol |
| Compatible with Vehicle Type | push-rod, flat tappet engines and performance cam applications |
| Container Type | Jug |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,547) |
| Global Trade Identification Number | 00079191220085 |
| Included Components | Motor Oil |
| Item Type Name | Motor Oil |
| Liquid Volume | 5 Quarts |
| Manufacturer | Castrol |
| Manufacturer Part Number | 15E809 |
| Manufacturer Warranty Description | 12 months |
| Unit Count | 160.0 Fluid Ounces |
| Viscosity | 20W-50 SAE Grade |
J**Y
Castrol Motor Oil, High-Zinc
Highly recommend. Bought this oil for my 1972 VW Super Beetle for the high-zinc additive needed for older air-cooled engines.
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!
D**S
good oil, extra ZDDP for older motors
good price, fast delivery
4**S
Best stuff for pre-1970 cars.
I use it on my 1960 MGA because of the high zinc content. Delivery was very quick.
J**S
Castros oil
Great oil!
C**N
Easy to find classic car formula for great price
Great alternative to zinc additives or running a standard oil in older flat tappet cars. I have used this and Lucas classic car formula. It feels like Lucas does a better job with cleaning and cooling, but this seems to work well too. This is cheaper usually so well worth it. Put it this way, if I can get Lucas on sale where its within a few bucks of Castrol, I'll buy Lucas. If Lucas is too expensive or too hard to get, I'll happily use the Castrol.
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**B
Necessary if you don't have a roller cam.
Great. Using on flat tappet camed Pontiac. Has the necessary zddp.
Trustpilot
2 months ago
1 month ago