As the other guy had said the dealer won't want to know after 9 weeks, 9 days perhaps but as it stands your car is now second hand and you're going to have to sell it back to him and he'll want the best part of £2,000 off you for a diesel. Partly because Diesels are about £1,000 more in the first place, and the rest for his cut.

In any case since you're only doing 10,000 miles per year, that's pretty much bog standard average milage, there is nothing high about that you have to do some cold hard number crunching to see if it is worthwhile, with the added purchase cost it probably won't be worth it.

I'm not sure your figures are correct either, £80 in petrol per week to do 40miles every day? That works out as your car doing 13mpg, which it's pretty much impossible to do with that type of car, either your figures are wrong or there is something wrong with the car, either way there is a problem.

Richard,

I feel that you are going to have to stick with your current car as financially, it will not stack up for you to change to a diesel.

A dealer will buy your car from you, however, they will want to pay you somewhere in the region of £6000. I assume you will have paid somewhere in the region of £8000-8500 9 weeks ago?

At 10-12000 miles per year, it is borderline whether it would be worth you having a diesel car anyway. The cars are generally about a thousand pounds more expensive and the fuel is 7-10pence more expensive to buy from the pumps. Take into consideration the amount of money you will have lost already if you trade you car in now and think long and hard before becoming a car salesman's delight.

A diesel car will have you spending less time in the fuel station - but have a look at the overall cost of changing to and running a diesel.

My advice, stick with what you have for a while - probably not what you wanted to hear but there it is.

JJ

I had bought a new car Suzuki Swift 1.3 GL 08 reg and i got it for 9weeks now. I have got a new job which involves drive 40miles per day to goes to work and i spend £80 on petrol per week and now i have realised that i should of bought diesel car at the first place, am looking for a diesel car and i don't have a clue what am going for also will dealer agree to buy my current car. I don't have much of knowledge about dealer, help me out here please

Richard