on a '91 Ford Fiesta with many kilometers on it, the engine became smoother in sound and operation but it needs a minute to warm up. very good

I have done over 100,000 km with these, changing them every 10,000. Very good but be very careful, there are a lot of fakes on the market.

Truly impressive change in engine behavior, it is not noisy and the engine runs more smoothly compared to Castrol 5w30 in a Golf 5 1.6 FSI with 310,000 kilometers. Now I put this in and it is much better

I have put it in a first generation Audi A3, the 1.6. Impressive oil, reliable after 10,000 km. I recommend it to you, especially for a car with many kilometers

Quality! It lubricates the engine perfectly. What I noticed is that the car with its use doesn't "burn" as much oil as with other brands of lubricant. I have used other companies, but this one fits perfectly in my engine.

The car is a Seat Ibiza '2000 1,600cc 8V 101Hp.
The engine has 235,000 km with excellent maintenance and oil changes every 7,500 km along with the filter, as the manual states.
I usually use 5W-40 Full synthetic (Motul 8100 or Aral) and at 7,500 km, it comes out brown instead of blonde.
The usage is city, Attiki Odos, and a few trips.
I rev the engine quite a bit, with high speeds on trips (140-180)...
The engine DOES NOT CONSUME A DROP OF OIL.
They put Magnatec 10W-40 in at the garage when I don't bring my own.
Keep in mind that Magnatec 10W-40 is semi-synthetic.
Very good oil, BUT for me, it NEVER LASTS 7,500 km as recommended by the manual. After 4,000-5,000 km, the engine sounds quite a bit. So, oil change....
So it's better to go for a branded Full Synthetic

5/40 in grande punto tjet 215,000km, until 50 I used selenia. Since 2012 only this. I don't know about engines that work calmly as everyone says, I know that until now the car doesn't burn a drop of oil, with a change at 10 and filter together.

There is none! The best oil! Big difference from all the oils (10-40w) I have changed, the best!
I won't take any other again!

The workshop installed it for my natural gas car and since then, there hasn't been any issue that the oil is responsible for. If you also read about Castrol's magnatec technology, you will see that it also benefits the engine during cold starts, where the most wear occurs at the beginning

Awesome oil, I use it in my Honda Jazz for winter and it quickly lubricates the engine unlike the Magnatec 10/40. The only reason I give it four stars is because it is quite expensive until the next change!!

For a scooter and engine purchased from a generator. The cheapest fully synthetic.... I didn't see any difference in the engine's performance (in the generator).

I would go for a cheaper one from the same company. It consumes a considerable amount. Tested on a 20-year-old car with an excellent engine.

I put it as a supplement after an indication on the Mini One. The engine sounded like a tractor long before the indication, instantly the normal sound came! I have already done 1000 kilometers and it's time for service and everything is working perfectly. With just 1 liter. I highly recommend it without hesitation.

Very good oil. But while it said it meets the 502vw specifications on the container, in the next purchase the same C3 oil did not mention it, it had been removed from the specifications 502w

I have been using it for a long time in various cars, as I am a fan of this brand. Now that I have been using it for a while, I notice that it burns a little, but I will change it and compare it with a lubricant of another brand and I will come back with a comment.

I have been using it in various cars for many years and many types of oil of this brand depending on the models and technology of each era, I always found it and find it a worthy lubricant, that's why I continue to use it.

Hello and from me: I have a Seat Leon 1.4 2004 from 30,000 km when I left the Seat service until 210,000 km I used Aral 5-40 and changed it every 15,000 km and it didn't burn a drop. The oil would turn black after 10,000 km. Until the last change, I came across the above comments about Castrol c3 5-40 and I got excited and made the mistake of trying them. The result was that today, at 8,300 km, the oil was pitch black, thin like water, to the point where it didn't stay on the dipstick for measurement. And for the first time, I had to add 300 grams of oil. The reason I give it 2 stars is because I read that there are counterfeit Castrol products on the market. If I was sure that I had used the genuine ones, I would give it one star.

I have driven 1500 km and I hear the engine working more smoothly. Its sound has changed. I will see it in the future.

Good for its price, but it is preferable to spend 10-15 more to get something better. The engine sounded more after the change and I threw them away at 500 km. Be careful, there are many copies of Castrol circulating that have flooded the Greek market.

It has low consumption, and the motor makes a little more noise compared to the Edge. Excellent quality-price ratio!

I have been using Castrol for many years in my BMW 316 and it is by far the best. I change it every 12,000 kilometers and it does not burn any oil at all. It works perfectly

I have used the oils three times in my car, without any problem. Very satisfied.

I have been using them in my car (5w40) Honda Civic 1.4 from 2008 for five years and I am very satisfied, and the price is excellent compared to other oils of much lower quality!! UPDATE: I continue with the same oils and I see no reason to switch to another brand. There has been a change at 12,000 km over the course of a year and it did not burn a drop. I believe that with normal driving, they can easily last at least 15,000 km. Now, as for the price, it seems to have increased. On 2/1/2024, there was a change after 9,000 km (1.5 years) and there was no oil leakage. Only Castrol for 10 years in a row.