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Castrol

Castrol GTX 20W-50 Conventional Motor Oil, 5 Quarts

  • Based on 2,817 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Oct 17
Order within 11 hours and 47 minutes
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Size: 5 Quarts


Features

  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against engine sludge
  • Premium quality base oils and anti-wear additives to help extend the life of your engine
  • Helps minimize oil consumption
  • Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM | ILSAC GF-6
  • Ultra low friction to improve gas mileage; Bottle Color: White
  • Exceeds ILSAC GF-5, API SN

Description

Castrol® GTX® is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards.

SAE J300 Viscosity Grade: 20W-50


Brand: Castrol


Liquid Volume: 5 quarts


Package Information: Bottle


Vehicle Service Type: Automobiles (generic)


Brand Name: Castrol


Manufacturer Part Number: 03095


UPC: 079191000953


Global Trade Identification Number: 53


Manufacturer: Castrol


Size: 5 Quarts


Unit Count: 160 Fluid Ounces


Included Components: Motor Oil


Item Type Name: Motor Oil


Item Weight: 8.6 pounds


Model Number: 03095


Manufacturer Warranty Description: 12 Months


SAE J300 Viscosity Grade: 20W-50


Container Type: Bottle


Compatible with Vehicle Type: Automobiles (generic)


Flash Point: 218 °C


Viscosity Level: Medium to High


Automotive Fit Type: Universal Fit


Liquid Volume: 5 quarts


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Oct 17

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Great for Hydro Gear Zero Turn Mower Transaxles
Size: 5 Quarts
Castrol GTX 20w50 has been perfect for the oil changes in my Hustler zero turn mower's Hydro Gear ZT-3100 transaxles going on 16 years now. It meets/exceeds Hydro Gear's requirements, and Amazon's price is less than half the price of the other brands sold at the mower shops and online.
Reviewed in the United States on February 14, 2026 by Walt fan
    • Castrol GTX 20W-50 Conventional Motor Oil
Size: 5 Quarts, Pack of 3
Very good quality conventional motor oil, and a great price, as I prefer conventional over sythetic, and if you use motor oil according to the region and the climate you live in, your vehicle will last longer and you'll thank yourself for it in the long run. It's awful hot where we live in the south, and I have used heavier weight motor oils for over 30 years, and have never had an issue with it, hotter climate use a heavier weight, colder climate use a lighter weight. Excellent performance and lubrication, great value for the money, CASTROL has always produced a good quality motor oil. ... show more
Reviewed in the United States on December 19, 2025 by jeremy
    • Good oil good deal
Size: 5 Quarts
Good deal
Reviewed in the United States on July 29, 2026 by Jaime Constantine
    • A
Size: 5 Quarts
Bueno
Reviewed in the United States on July 13, 2026 by Daniel perez
    • I mean its good oil, but...
Size: 5 Quarts
This is good oil. But, I made the mistake of also changing my oil pump to a high flow pump (as I was trying to fix a low pressure problem). The combination of doing both at once, put my oil pressure at dangerous high levels. Silly mistake on my part, and a total waste of money on this oil (cant return it, its been used for 15 minutes!). But this is good oil to get for an old low pressure engine. Just don't put it into an engine that already has decent pressure with a lower viscosity oil. ... show more
Reviewed in the United States on April 21, 2026 by IncredibleHat
    • Great oil
Size: 5 Quarts
Great oil, been running it in my Harleys for many years
Reviewed in the United States on June 1, 2026 by Eric M Ellanson
    • A good engine oil for older cars.
Size: 5 Quarts
Have been using this for my old 1987 model car since 1990...I have resist switching to synthetic or semi synthetic because I do not want to take a chance on engine leaking. This was a problem on early synthetic and I read that the newer synthetic do not have this problem anymore, but why take a chance.. The 5 quarts are a good value when they are selling for around $25, but it seem the price has went up. Not sure I will buy them anymore if they are the same as buying the 1 qts, since I have to use a funnel for the 5 quarts due to clearance on my rear engine car. ... show more
Reviewed in the United States on May 3, 2024 by Kindle Customer
    • Great quality n price
Size: 5 Quarts
Great for the small engine and summer
Reviewed in the United States on May 24, 2026 by SLAYR

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