Google Sheets: Highlight First Instances within Range of Cells that are Specific Amounts Greater Than a Cell

I have a vehicle data sheet with 3 different columns (L7:N56) to track the odometer reading during services or at the beginning/end of a trip.

1. I want to be able to check all three columns (L7:N56) and highlight the first instance that is greater than or equal (>=) to 3000 miles greater than the last oil change odometer in cell M4 as a warning that we will need an oil change soon (M4+3000).
2. I also want to be able to highlight the first instance that is greater than or equal (>=) to 5000 miles greater than the last oil change odometer in M4 (M4+5000).

I do not want to highlight every value that meets the criteria (no duplicates), only the first instances.

example of vehicle data spreadsheet