Businesses are legally obligated to dispose of any waste oil produced properly – namely by using a professional waste management company. This is for the obvious reasons of protecting the environment from the contamination that can come with illegal oil disposal.

Firstly, look into the company's pedigree: have they been in existence long, or are they a new entrant into the market? Clearly, there is less risk involved in selecting a company with considerable experience in oil collection, especially as experienced staff will be well versed in handling waste oil. 

Secondly, ask the potential candidate about outsourcing the type of client they are used to dealing with. Some companies may have many clients who are motor car dealerships so will be a better fit if you are a car dealership, while others may deal more with engineering clients.

Thirdly, check for testimonials from satisfied customers, as any company can advertise their competence in waste oil disposal but testimonials from satisfied customers serve to back up such company claims.

Many waste oil management services offer cash rewards for recyclable oil, so it makes sense if you qualify for cashback incentives to choose a company offering such a reward scheme.

And, finally, to meet the second initial point about ensuring waste oil is disposed of correctly, check that the potential candidate is licensed.