the best for a Honda moped 250,000 kilometers on dirt roads and mud I only changed the cylinder and piston and that was because I wanted to make it bigger

When it gets hot you can't change gear. (new review after a few days)
And even without getting too hot, it's still unacceptable! This oil is only for open road and low temperatures! By the way, the Cyclon Lava Super, which is 3 euros cheaper, performs much better! I used it on an old GPZ. Who is the official importer of Castrol?

For BMW F650GS 2005 I used 15w-50 elf, because I don't do trips but mostly city with frequent stop and go and work, I changed to a different viscosity. Durability will show

I put it in a Kawasaki ZZR 600, and while on my first ride I was very satisfied, the next time I don't know what happened, the gears became stiff to the point that the lever needed a lot of force, especially when downshifting... the gearbox bangs like crazy, as if there is no clutch!!!! Also, I didn't like the sound of the engine, it is very loud, and when I say very, I mean it rattles so much that I am having second thoughts about this oil (!). I have been using Castrol 10-40 for years, the well-known one that is also used in cars, but with this one I was so disappointed that I will probably throw it away... what a waste of money!

I just put it in the bike and the entire operation of the engine changed... I don't know if it's really just due to the oil, but it works faster and smoother!!! I will put it in again!!!

I won't say much, 30,000 km Distribution. With a moped.
Every 1,500 I did the change sometimes even earlier. (I also cleaned the filter of the centrifugal)
Result, crankshaft bearings.
It's good for simple, everyday use for its price, not for more.

Installed in BMW F 650 GS Dakar 2005
The gearbox sounds quite loud, I didn't like its operation
Before the oil change, it didn't make that much noise
I took a ride on a friend's identical bike with Belray 15/50 oil and the operation of the gearbox was much better

It's incredible, it softens the speeds a lot and the engine works very smoothly, I installed it on a Daytona DV

I put it on a duck, it works just fine and the gears shift much smoother!!! best value for money...

Amazing Oil. The speeds are buttery. Riding the bike all day, the temperatures remain normal. Easy installation with the special nozzle it has. The engine sings! I use it in a Honda Astrea Grand 110!

For its price, it is excellent; it does not offer the ultimate lubrication and protection for large single-cylinder engines of 500 and 650 cc, but it has the property of cleaning the engine perfectly.

I have been using them for years without any problems. I simply don't overdo it; I change them at regular intervals and a little earlier than what the manufacturer says, and I have peace of mind.

In Papio Modena Kriss 115, I did not notice any difference in the engine sound or gear changes. It seemed like a simple, regular oil without anything special. 4 stars because it is relatively affordable oil.

I put it on a motorcycle, I have seen a difference in consumption and power/top speed, it is fantastic and smokeless!!!

Perfect oil. I use it on my sym nht 125, the best I have ever used.... change every 2 to 2.5k km... I highly recommend it

I have been using them since 2016 on a Honda Supra imitation scooter and it doesn't burn a drop of oil. And in the transmission, they are the best. All these years, I haven't had any issues!

The best oil for the money.
I put it in my citycom and it doesn't burn a drop.
The sound of the engine sweetened.

It has been used for 2 years on a Kawasaki Kazer 115. In the first 100km, the oil does its job well, but afterwards it loses its composition. The gears make a lot of noise, it quickly turns black, loses its proper lubrication (I can tell from the gear changes), and in the summer it becomes watery even though it is 20w50. Of course, the engine burns some oil and definitely affects and dirties the oil, but still, in my case, I am not satisfied at all.

I have been using it on my motorcycle (Lifan 110) for 5 years now and I have no complaints. The engine runs smoothly and the gear shifts effortlessly. It is also affordable, so you can change the oil as often as you want. I will continue to purchase it for many years.

After many trials, I think I found the best oil for my motorcycle. The gears finally stopped clunking and I have a smooth transmission. I have ridden 4000 kilometers and the transmission is quiet. Motorcycle: Honda Transalp 700

It arrived quickly, sealed, I used it for my BMW F800GS and I have done flawlessly 2500 kilometers so far.

The Crypton S 115 is something else. The speeds change as if it's automatic. It doesn't burn at all, and when you change it at 2000km, it's still clean.

Perfect oil, I have been using it for 3 years on my scooter and it works exceptionally well with smooth shifting in the gearbox, while the engine runs smoothly. Of course, I change it every 1000km and it doesn't burn a drop, even when I push the engine hard. Overall, the oil is perfect, especially considering its price

I put it in a Sym JET X 125 and it is very good, you can't see a crazy difference because it doesn't have a gearbox, but you can hear the engine working a little better.

I started using this oil in my scooter at 15,000km, changing it regularly every 2-2.5km. After all these years, I have reached 150,000km in my scooter with the same oil and without any engine rebuild. Distributor for so many years. Good and economical oil, I highly recommend it

Honest for the 6 euros I paid, however, for my own motorcycle, it is quite mediocre oil for summer compared to the Motul that I usually use (same viscosity). In the "cooler" seasons, things are different and I prefer Castrol solely for how quiet the engine is during cold starts.

A mediocre oil at a good price.....for small cc motorcycles it is a very good choice.....for medium and large cc motorcycles it is mediocre....

The best thing for my Kawasaki Vulcan vn800A engine is when you use this oil, you don't hear any noise in the gearbox! With other oils in the past, I always heard the gearbox. You can confidently use the 10-40 everywhere, even on a scooter!

It is very difficult, I believe, to find a store that will sell you genuine castrol oil, beware of imitations.
I have been using it for two years on a 125cc four-stroke motorcycle.
In one dose, it burned it all, but another time it didn't burn at all, different stores have different behaviors with the oil... Clearly, it has to do with where you happen to go...
The motorcycle is also old, I'm not denying that, but it clearly had something to do with the oil not working properly.