The machine used is Bosch ACS500. The mechanics had books with all the specs for the most cars manufactured using R134a refrigerant. There is a label under the bonnet lid with all the specifications as shown:-    Notice that refrigerant quantity of 440g has an allowance of +/- 30g. Lubrication is ND8.  Here is a link to Hella and they list every cars capacity - https://www.hella.com/techworld/uk/Technical/Car-air-conditioning/Car-refrigerant-oil-filling-quantities-2114/# A