Please iterate a reason to why you would disagree. I would expect you to have enough pharmacological knowledge to understand that mixing a sterile aqueous solution and a sterile oil based solution won't produce "a dirty injection". I am eagerly awaiting your explanation to how these two will interact to create an infection.

The only thing would be that if you don't shake the syringe it can create a forceful squirt while injecting. Shake for bubbles and pin!