I have a pneumatic 9l oil extractor that gets used a lot on my wide variety of motorised cars and plant. Clean and easy. It's main use for me is on engine oil extraction from plant with awkward drain plug location or from cars' such as the Range Rover, where there is a specific vacuum drain tube. I have also used it on the Rangy to grab the oil on an ACE fluid flush recently. I also own a a car with no drain plug on the differential so it gets used on that.

For under £30 for a manual pump with 9l capacity reservoir, that's a keen price for a product with decent Amazon buyer reviews. My oil extractor is one on my regular go to garage tools.

https://www.amazon.co.uk/gp/product/B0CDFY..._957079191