mudguard: An update
They've offered a $10k upfront payment(net) , $15k pa salary increase, and 36c per km for business use. So pretty reasonable in my opinion.
The official IRD rate is 72c per km, so there's a little bending of rules there I'd think.
Remember is a reimbursement so non taxable.
The salary increase is of course subject to tax, so given the lower per/km rate is it possible you'll be worse off than had you been given the official rate?
The upfront payment simply helps you get a vehicle and makes the deal looks more attractive. But at the end of the day you providing your own vehicle on these terms removes cost, time and responsibility from them and puts these back on you.