DP doesn't drive - he could never be bothered to put the work and effort in, basically. I however, knew one of us needed to, so I put the effort in and passed my test, paying for all the lessons myself, obviously.
I bought a car, paid for the insurance, tax, breakdown cover and general maintenance. BUT I pay for petrol (roughly £60 a month) out of the joint account. We both put money in the joint account for bills and rent, and have separate accounts for other expenses. There is always quite a bit of money left so I pay for petrol using this.
Up to now it hasn't been a problem, but now DP is complaining. He says I should use my own money to pay for petrol, as I use my car to drive to work. This is true, but I also give him lifts here and there, drive to the big supermarket once a week (about 5 miles away) for the big weekly shop, and drive to his parents house once a month (30 odd miles away). The way I see it, he's benefitting from me being the driver (whereas he doesn't drive), but doesn't have to actually pay for the car, insurance etc etc. I pay for all those things.
AIBU to think what I do is fair? I should also add, he makes about triple what I do, and we both put set amounts in the joint account. After we've put this money in, I have about £500 to spend on myself/essentials/savings whereas he has about £1500, sometimes more. He has to pay for his train fare (£150 out of this), but he still has significantly more cash.