Sooty

Just for future reference the MP engines were not rusty like that, more of a sooty oily color right over the exhaust stacks and then road grime on the lower portion of the engine.

The only engines that were that rusty color were the GP-15-1's and only on the top of the short hood and the cab roof.  They seemed to rust overnight, but not the rest of the unit.

When I worked for the Mop, I swore they had an "external lubricating system", they'd blow oil out the stack and then let it seep back in through the hood doors.  .  All my shirts had little black spots on the shoulders from the oil drops blown out the stacks when an idling engine revved up.

On the GP-7, 9, 18's the blue would fade badly in patches and the red buzzsaw would be almost white.

Ah, those were the days.

PS:  The exhaust stacks are on sideways.

Just an old picture