[Zeke]

Neighborhood etiquette went away years ago. You can politely discuss this and see what the reaction is. Don't be surprised if the neighbor is clueless and what's more, gets pissed off at you for bringing it up. After the fact, anything you do or cause to be done will come right back to you.

The oil drops are one leverage you can use by reporting to whatever environmental hazard enforcement you have available. The 3 day parking rule is in effect in many places.