Hi Fehlerteufel,
The oil was only replaced last year and I did it with another technician. We use Gulf western superdraulic 68.
See attached photo of oil level when the lift is at the top floor and it's not foamy at all.
https://1drv.ms/i/s!Auww3LXVzmjw9V3HLgGRgv-S2uKD
We haven't tried a leak down test yet with the power off. We're going to try that next service.
