I spent 15 minutes checking double line laws and referred to somebody who drives by that gas station daily for work.

The best I can tell is Title 39.  Section 39:4-123 covers it.  It is legal to cross double yellow lines to enter businesses and residences as per page 75 the NJ driver's manual under "Left turns, between intersections."

https://www.nj.gov/mvc/pdf/license/drivermanual.pdf

The person who drives by it daily says the turn is taken but very rarely utilized cause of traffic.

I spend a lot of time mapping this area, unless there is a R3-2 sign saying no left turns, I leave it.  This is to respect the local businesses.

I recommend contacting your SW team to start respecting the "destination" access value.

All that said, I will contact my local township and inquire about having a R3-2 sign added to the location.