hydraulic oil for slab saw?

Yup, I tried the hydraulic fluid carried for tractors at Walmart. Real cheap but the project was in my case a big failure. It's pretty viscous and picked up grit and jammed the saw in the cut right quick. I guess anything used for the saw has to run just about like water. A buddy of mine made the suggestion as he uses it in his 36" drop saw with some success but I think he cuts his oil with kerosene. I've adopted the use of lots of kerosene with my oil as a money saving device and it's a great coolant for cheap! Not even very bad smelling and easy to clean off the stones. Most my buddies do this. I had some doubts about the flammability but it doesn't seem to be a problem as kerosene is hard to ignite. I've been using it about two years now. One of our big rockshops here uses straight kerosene and has for 20 years with no problems and he runs multiple saws all day long every day. I was a little worried about closed chamber gas vapor explosions too but have yet to hear of one. I keep a fire extinguisher a handy though. Fumes are a bit hard on the lungs too so I try to avoid breathing them. Cool thing is, it's readily available in 3 1/2 gal ponies for like $13.00 in paint departments everywhere....mel