There are several companies that produce car fire extinguishers. Some of the companies that produce car fire extinguishers are Minimax Limited, Buckeye Fire Equipment Company, Amerex, and The Pyrene Company Limited.
Generally, no, but a fire would.
A car extinguisher may be necessary for putting out several different types of fires, so it should be a Class A:B:C extinguisher, normally dry powder. For an irreplaceable classic, one might consider a CO2 or a "clean agent" extinguisher, to avoid the damage potential of dry powder chemical extinguishers.
Dirt, or sand.
The companies that produce the car computer are companies such as Chevrolet, Ford, Dodge, Toyota, Honda, Hyundai, Buick, Cadillac, Chrysler, and more.
Fire blankets are used to smother fires by depriving them of oxygen. Whilst it would not be essential for a car first aid kit it would be useful. Note that a car fire blanket is different to a household fire blanket and will not replace a fire extinguisher.
As you say, its oil primarily "B" category fire extinguishers should be employed...
These very large companies that produce car engine oil include Pennzoil, Castrol, Mobil 1, and Valvoline. Additionally, Motorcraft, Quaker State, and Peak also produce car engine oil.
If you want to know which companies produce GPS systems for your car that are currently for sale in Office Depot, it is Home Depot. This company produces these devices.
Typically with really big fire extinguisher. If the car is fully engulfed, only the fire department will have the resources to extinguish the fire. If it is in the engine compartment, and has only begun to smolder or is quite small, sometimes slamming the hood will blow the fire out. Do not waste much time doing this though, with inside hood releases, this can be dangerous.
Any and all fire extinguishers should be inspected at least once a month. If you live in an area of severe hot or cold temperatures, it is wise to inspect them more often.
Fortunately you can purchase fire retardant spray from many stores. For online purchases, Amazon carries several fire retardant sprays. Also, stores such as Home Depot and Sears carry such sprays.
NO, all insurance companies require you to carry insurance on a vehicle with a lien. What if it catches on fire or is stolen.