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Castrol

Castrol GTX 5W-30 Synthetic Blend Motor Oil, 5 Quarts

  • Based on 2,817 reviews
Condition: New
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Availability: In Stock.
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Arrives Tuesday, Sep 1
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Size: 5 Quarts


Features

  • 1.4X superior sludge protection compared to tough industry standards, as measured in the Sequence VH Sludge test vs. API SP test limits
  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against high-temperature deposits
  • Premium-quality base oils and anti-wear additives that help extend the life of your engine

Description

Various environmental factors, such as subpar fuel quality, hot weather, and stop-start driving conditions, can have detrimental effects on your engine. The accumulation of sludge, varnish, and carbon build-up due to these factors can significantly reduce engine life, power output, and fuel economy. Castrol Ultraclean is a synthetic blend engine oil available in 0W-20, 5W-20, and 5W-30 grades. Its unique double-action formula has been scientifically proven to effectively cleanse and remove sludge that can obstruct vital engine oilways. Additionally, its advanced synthetic technology aids in preventing the formation of new sludge. In fact, it offers up to 1.4 times superior sludge protection compared to the latest industry standard. When it comes to maintaining a clean engine, no other oil can rival the performance of Castrol Ultraclean.

SAE J300 Viscosity Grade: 5W-30


Brand: Castrol


Liquid Volume: 5 quarts


Package Information: Bottle


Vehicle Service Type: For Gasoline Engines


Brand Name: Castrol


Manufacturer Part Number: 03096


UPC: 079191000960


Number of Packs: 1


Global Trade Identification Number: 60


Manufacturer: Castrol


Size: 5 Quarts


Unit Count: 160 Fluid Ounces


Included Components: Motor Oil


Item Type Name: Ultraclean Motor Oil


Item Weight: 8 ounces


Model Number: 03096


Manufacturer Warranty Description: 12 Months


SAE J300 Viscosity Grade: 5W-30


Container Type: Bottle


Compatible with Vehicle Type: For Gasoline Engines


Flash Point: 200 °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: Tuesday, Sep 1

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

    • Good price.
Size: 5 Quarts (Pack of 2)
It’s a name brand quality oil, got here in good shape. Not much else to say.
Reviewed in the United States on May 25, 2026 by ROD
    • The ultimate engine protector!
Size: 5 Quarts
I've been using Castrol GTX Ultraclean 5W-30 Synthetic Blend Motor Oil for some time now, and I am thoroughly impressed with its performance. This motor oil is designed to keep engines running cleaner and smoother, and it certainly delivers on that promise. One of the standout features of this oil is its advanced formula, which helps to reduce sludge build-up and protect against wear. Since switching to this oil, I've noticed a significant improvement in my engine's overall cleanliness and efficiency. It runs quieter and feels more responsive, which is a testament to the oil's ability to keep everything well-lubricated and free from harmful deposits. The synthetic blend formulation offers excellent protection in both high and low temperatures, making it a versatile choice for various driving conditions. Whether I'm dealing with scorching summer heat or freezing winter cold, I can trust that Castrol GTX Ultraclean will keep my engine protected and performing at its best. Another benefit is the improved fuel economy. I've observed a slight increase in my vehicle's mileage since using this oil, which is always a welcome bonus. The 5-quart size is convenient and provides enough oil for a complete oil change, making it a cost-effective option for maintaining my vehicle. Overall, Castrol GTX Ultraclean 5W-30 Synthetic Blend Motor Oil is a top-notch product that I highly recommend. Its superior engine protection, improved performance, and enhanced fuel efficiency make it a must-have for any car owner who wants to keep their engine running smoothly and efficiently ! ... show more
Reviewed in the United States on February 14, 2025 by Kimberly Landgraf
    • Great Price for a Great Oil - Recommended!
Size: 5 Quarts
Received a great price for a great oil. But sadly since that great price I have only seen that price available to Prime Members. I have been using Castrol GTX since the 1980's and have always sworn by it being it has never let me down. I have never had an blow a seal, gasket, leak or burn oil while using Castrol GTX. And that is saying a lot as I use to be very hard on my vehicles, and can still be from time to time. One time I busted a hole in my radiator by accident in a parking lot over 15 miles from home. Having no tools or anything with me to fix the problem and being it was late night on a friday I had no choice. But to drive the car home as fast as I could before I lost all the radiator fluid and in turn over heating the car. Well long story short, the car made it home but was long out of antifreeze and the temperature gauge was buried in the red. Fearful for the engine I allowed the vehicle to sit over night to cool off. And the next day she started right up and was as good as always. I have always credited that moment to the fact I had Castrol GTX in the car and in turn is what saved the engine from the excessive heat. As I have not had the same luck other brand names of oil, as I have replaced two engines while using the brand name M. one. Due to my history with and without Castrol GTX motor oil, when I made my recent purchase of a high mileage Chevrolet Blazer 4x4 as a fun, toy around vehicle to haul things with and to play in the snow. Of course I drained the old motor oil out and gave her a fresh batch of Castrol GTX. I did the same for our other car as well. I would easily recommend this product to my friends and family. The oil arrived safely and in a timely manner. I was actually surprised they could ship motor oil as I figured that would be a hazard, but I guess the post office knows better. If you have a Prime Membership, you can almost always find Castrol GTX cheaper on Amazon than at any retail location even with a coupon or on sale. We were not paid nor discounted in any way, shape or form for giving our honest opinion here of this product as a review to assist others. We believe, as a family, it is important to give an honest and accurate review to assist others so they can make good purchasing decisions that can benefit them and their family. And not be lead to cheap, unwanted purchases that are scripted by advertisers to buy their products. We are a family that believes in a minimalist lifestyle while trying to be green as much as possible in all departments of our life. As we care to leave something, anything, of this planet to our grandchildren so they may enjoy it as we have. ... show more
Reviewed in the United States on October 26, 2015 by Roe
    • Good oul
Size: 5 Quarts
It’s a good oil
Reviewed in the United States on May 25, 2026 by Jwes
    • Motor oil for 2019 Toyota Corolla LE
Size: 5 Quarts
Great price for oil when you’re changing it yourself.
Reviewed in the United States on July 20, 2026 by paula
    • Oil
Size: 5 Quarts
Use all the time
Reviewed in the United States on July 3, 2026 by mark
    • Priced good and saves trip to store
Size: 5 Quarts
Great price
Reviewed in the United States on August 9, 2026 by cara h.
    • Great value. Buy a case now
Size: 1 Quart, Pack of 6
Buy this case. Good value prices I put 2 in each of my 3 cars and I check oil & fluids weekly as part of Saturday chores
Reviewed in the United States on June 14, 2026 by Paul J Frederickson

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