If this is the same stuff as the old "cold start" sprays from way back it is probably an ether based spray. If too much is sprayed into the engine it will wash any lubricant off the cylinder bores just as the compression rings / oil control ring is rubbing up and down it as the engine cranks over. Not good for the bores!
There was an urban rumour that diesel engines get "addicted" to ether start, to the point that they will not start without it.
What tends to happen is that a possible fault with the original cold start mechanism (glow plugs etc) has deteriorated or worn cylinder bores / gummed up piston rings have slowly lost more and more compression and the ether start has masked this fault for a while, but as the fault gets worse even the ether cannot overcome the problem.
Many of the gritting lorries at the council yard i used to work at had this problem. Mainly caused by drivers spraying the stuff in out of habit on a icy cold morning without trying to start the engine the normal way and ended up scoring all the bores on the small auxilliary donkey engines. It got to the point that when new gritters were bought the management banned all easy start products from the yard.
Just a thought, and always happy to be corrected :ILU:
Just googled "start ya b*****d" - it does use ether.
