lots of smoke and anger

I was driving my SVX this morning on my way to work, when: I noticed a little smoke, no prob as i had seen this once or twice before, i thought. About 8 miles later i looked back to see a very havey trail of white smoke. I thought it was the oil, but it didn't overheat at all. I mad it to work quite disgruntled. Later i checked and the oil is fine, but hteres no coolant. Could the line have just been trickling and then broke? Would coolant on the block smoke? Also gas mileage seems to be terrible in these things, i get maybe 200 miles to a tank (12 gallons?). My father (a mechanic, who has fixed an svx recently [changed both front axles in an hour] ) says to just put oil where the coolant would go and just drive it the 8 miles home. Any iedes on the problem? Thanks.

BTW, now i have to drive an 1980 something 300zx to work