I didn't notice any significant difference from Motul 5100 that I had before, however the gears shift a bit more smoothly. I don't know if I will choose it again immediately since it is a bit pricey and there are quite a few other options that are worth trying.

I highly recommend it for motorcycles where the manufacturer recommends 15w-50 semi-synthetic. I have a SYM Symphony SR 125 Euro 5 from '22. 63,000 hard kilometers in delivery and the engine is barely audible. Now in the summer with 35-38 degrees, if you think 20w-50 is excessive, for 3 months use the same as 15w-50.

I used it for years in several large displacement engines, I thought it was the right oil, when I changed brands I realized that it is not worth it for any reason. Never again.

Very good oil for engines. I used it in a single-cylinder Zontes. Good engine sound, good gear shifts. Recommended!

In a 1995 Kawasaki EL250, after performing an engine flush, the first thing I noticed is the smoothness in gear shifts and a slight increase in the engine's willingness to rev up faster. It is a very good oil for its price (12€ per liter), but I will also see its durability and endurance during the summer.

The best I have ever tried in my 30 years of using and working on motorcycles. Ideal oil for scooters as well.

Very good oil. I have used it in another machine as well. The gearbox was very hard and the speeds have softened a lot.

I put it on a Kawasaki Versys 650... where the gearbox is already noisy in the first place. I expected the noise to decrease, but from the first moment I realized that it doesn't do the job... it hits even harder compared to the Motul ones that had 6000 kilometers on them. Of course, I wouldn't choose them again

The reputation of BEL-RAY is truly worth it. Changing the lubricants on my four-cylinder supersport motorcycle made it work better, and it was evident even at idle.

I tried it on my Suzuki Address 125 scooter for 5 months and the scooter is almost silent, the gearbox became butter!!!! AMAZING, I highly recommend it for Suzuki!!!

After 10 years of using MOTUL, I decided to switch. I don't know what they have put inside, but whatever they have put, it's the best. From the first moment, the gearbox feels like having a joystick on your foot. Only BELRAY from now on.

I used it on my scooter.
+ It withstands more than 2,500-3,000 km, which is required for a scooter (casual driving).
+ Quite good for prolonged use.

- The gearbox was not as smooth as some others.

The Motul 5100 has better performance in gear shifting.
Its quality is good, after 10,000 kilometers of daily driving on the highway at high speeds, the oil came out clean - neither black nor dissolved.
However, I don't think I will use it again in the future.
I recently used Agip in a service, so I am expecting results from there.

I put it in my old Astrea Grand from the first day, with a change at 2500-3000. Smooth transmission and countless kilometers without any damage. (20W50)