gmercoleza,

'forget the engine(s),Gasoline or Diesel...The threat is the Generator/Alternator
OR......this will keep you awake at night, the Starter.

You pull into your favorite dispensor of fossil fuels and leave the engine running.

NO automotive or truck manufacturer equips their products with SEALED/
SHEILDED Alternators/Generators or Starters!

We are cautioned against leaving the Cell/Sat phone on when refueling, in
case of an incoming call (Non-shielded ignition source).

Ditto with the engine running ,the electrical regeneration source for the
battery is nothing but SPARKS!

In the second scenario, there is a fuel leak with the corespondent vapor
emissions... and you engage your starter (Non-shielded ignition source).