K so the tax consequences are:
Start with the determined value of the car, which is the cash cost of the car (incl VAT).
Then the value of the fringe benefit is 3.5% of the determined value, per month. If the car comes with a maintenance plan then it is 3.25% per month.
If you keep a detailed log book, then you can get a reduction of the value of the fringe benefit above, by multiplying it by business km's/total km's.
Then, if you bear the full costs of licensing, insuring and maintaining the car, you can further reduce the value of the fringe benefit by the amount incurred x (private km's/total km's)
Lastly, if you bear the full cost of fuel, you can reduce the value of the fringe benefit by private km's x 81.5c (provided the new car costs R265 000)
To get any reductions you will need to keep accurate records (no more reductions based on deemed expenditure).
Hope that helps

Do consult a tax consultant just to make sure of the above.