anyone know whats best to scrub oil off of bricks ?

why? Fuck diluting it. It’s way more fun if you dont. But since we’re on the topic, if you have any rusty tools, toss them into some MA for about 30 minutes and they’ll be completely rust free. Its amazing to me that this shit is sold without restriction. Couple hundred gallons of this shit in a cropduster would be serious unpleasantness.