Had a little engine fire in my truck yesterday; fortunately it happened just as I pulled into my garage, and not out on the road somewhere.
I grabbed my house fire extinguisher--how long has it been empty? I rushed into my travel trailer and got the fire extinguisher I keep in there, and that put the small fire out.
Today I went out and bought a fire extinguisher each for my car, my truck, my trailer, and the house. The several dozen dollars I spent on them is a pretty cheap insurance policy.