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Your cart is empty.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.
DIANA MARIÑO
Reviewed in the United States on March 2, 2025
Excelente produto
Shawn
Reviewed in the United States on February 9, 2025
Love castrol especially for European cars
fmwardalot
Reviewed in the United States on February 23, 2025
I have a 2008 Corolla, 185K miles, and it has only had GTX 5W30 for oil. Engine does not burn a drop, oil change internal 3500-4000, and various filters. I also have a 2014 Explorer, 180K miles, only saw GTX 5W20, also does not burn a drop, 4000K mile oil change interval. Coincidence? No - I have used GTX for over 40 years, and have never fried an engine - small block Chevys, Fords, Toyotas, Hondas, Jeeps.. The body and frame rot out long before the engine has any internal mechanical issues.I will continue to use GTX as long as possible. GDI engines might move me over to one of the Castrol Synthetics
Kimberly Landgraf
Reviewed in the United States on February 14, 2025
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 !
John Lovejoy
Reviewed in the United States on January 3, 2025
ive been putting it off so long im finally glad i got it changed finally and i didnt spend as much on the good stuff as i would have for the cheap stuff at the auto parts store
Donny
Reviewed in the United States on August 1, 2024
This oil has the manufacture approval and SAE approval. Price beats the local parts house, and was delivered.
CARLOS DANIEL MARTINEZ SALAZAR
Reviewed in Mexico on May 19, 2024
Tenía mis dudas pero parce ser que está bien desde que le hice el cambio a el día de la reseña recorrí un poco más de 50 kilómetros si hubiera algo malo ya hubiera "avisado" note que es un poco más obscuro que el que compro tradicionalme pero hasta el momento todo bien.
Brys
Reviewed in the United States on December 16, 2024
I only go with Castrol and it cheaper here than big retail!
Customer
Reviewed in Canada on January 3, 2022
cheaper price
Luc Fluck Ferland Bolduc
Reviewed in Canada on October 25, 2021
Bonne commande
Tony
Reviewed in Canada on May 7, 2020
5 quarts of motor oil 102.99 was paid out.Asked for refund,I got it,3 months later.In the end it worked out,thanks to a great customer service team at amazon.Thank you
JohnWells
Reviewed in Canada on April 3, 2016
Good oil, handy to have 1qt bottles over a 4.4L or 5L jug.
Roe
Reviewed in the United States on October 26, 2015
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.
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