Hydraulic oil for models - what's in it?

[Lil Giants]

Yep, I use ATF as a cheap fuel lubricant in my pre 2000 diesel engines... the electric fuel shut off in the injection pump was sticking closed in my '95 CH 427hp, couldn't get it to start without tapping the back of pump with something metal. Dealership said to use ATF & I was adding 2L every 450L fill, by the third fill it cured the problem. The manual fuel shut off in my '83 350 Cat in the Panther almost seized up a couple yrs ago. The sulphur content is almost non exsistent in today's diesel fuel - emissions, fuel is really dry!