I'd do 1 ml (possibly 2 depending upon experience) an hour or two before training. Don't listen to your friend who says you only need to use it twice per week because "this is oil based".
Old post , but Dbol Inject is one of my favorite compounds to use preworkout !!!
Better yet is Dbol/TNE Blend pre workout !!! 1/2 hr before the gym and its pump city !!!