Your right Tom Ether will help get things running. You do need to be careful using it, espically with Diesils. The high compression ratio's they run will come apart if you use too much. Saw a motor that had happened to in a big truck. It wasn't pretty, 3 pistons were in tiny pieces. Heads were in really bad shape.
I use either to start my old Duetz in the winter, but it gets no more than 1 or maybe two short blast. Starts every time and doesn't need any more.