300ZX More Economical than 60+mpg DS3 Diesel

Sold the Diesel DS3 which was just 7 months old, So now the Z is our only car.

Basically, I work less than a mile from home, so ordered a cycle as a car cant even warm up in that time. Im working in a very cold food enviroment, so even whilst cold outside in the winter, its still warmer outside than in work lol.

Have only driven 120 miles in 5 weeks between the two cars - 100 of which were in the Z anyway lol.

Some may think Im crazy Selling a car acheiving 60mpg average fuel consumption, keeping the Zed, but I feel Im not really going to save that much by keeping the DS3 over the Z. Managed to get £14,500 for the Citroen which was owned outright, so it has gone into savings towards a deposit for the house.

I drive less than 4000 miles a year on average, which is around 75 per week normally So I will be using about £25 a week fuel, Vs £8 a week in the DS. Ok it seems a big difference, but its only £17 a week, vs £14500 price tag. Which would depreciate more than £17 a week. (£2600 over 3 years)

So now, which cars more economical? lol