I used Lucas Booster & Stop Leak is my recently acquired 1958 Case Backhoe. All Seven of the hydraulic cylinders leaked when I got the machine, two of them badly. I was using a lot of hydraulic fluid and getting annoyed by always having to deal with oil spots wherever I parked it. I was hopeful that the Lucas Booster & Stop Leak would stop the minor leaks and maybe slow down the larger leaks. I fully expected to replace all the seals in all the cylinders in the near future. The Lucas Booster & Stop Leak has worked so much better than I had hoped that I now think I won't have to face that task for many years if ever. I'm very satisfied.

First time, I had a very small drip coming from one of the lift cylinders on my bucket loader. I added 3 gallons of this / manufacturers recommendations. After a day of using it, the small leak became a steady stream. 2nd time using this was the same problem, different cylinder. I figured that the first time could have been a fluke, so I tried it again. A couple days later the small drip became a fast stream. I'm not going for a third time. I did notice an improvement in the lift capacity, but as far as stopping leaks from what I have found it makes them much worse