Hi Imran,
Each vehicle should have a Journey Log, kept in the car.
This log MUST detail all official journeys, details must include date and time journey started; odometer reading at start of journey; odometer reading at end of journey (NOT end of day, but EVERY journey undertaken). Fuel reimbursement is then calculated on kilometers per liter basis. Where the vehicle is used for private purposes then the log is NOT filled in.
The vehicle should be maintained as per the service schedule of the car and paid for by the company. Apart from punctures and replacement of tyres all other minor expenses such as replacement of bulbs etc are at the expense of the employee, (after all he does use the car for private purposes).
The policy should also mention the minimum amount of fuel the car must have AT ALL TIMES and the general cleanliness of the vehicle, weekly checks such as tyre pressures, fluid levels etc and monthly checks such as condition of wipers etc. after all the vehicle represents your company. The policy should also clearly mention if the vehicle can be driven by someone else other than the driver, (such as spouse), in which case you should hold a copy of their driving license as well. If you allow non-employees to drive the vehicle, you must check with your insurance provider if cover will be provided at no extra cost.
If an accident occurs, or a claim is made on the insurance, the policy should also clearly state the consequences if the driver is found to be at fault, such as paying for damages or the insurance excess. You should format and keep copies of an accident report form in the vehicle along with the Journey Log.
If the vehicle is leased then the leasing company will also place some obligations, these should be passed on as the responsibility of the employee.
I hope the above is of some help.
Regards,
Harsh