Some sums for you:
Your petrol car does 80 miles per day at 37mpg, petrol costing 129.9/l = £276/month
I've recently swapped to a 2l diesel. I take it easy and get 58mpg out of it, including my non-work driving. Your mileage and driving conditions may vary, but at 58mpg, diesel costing 135.9/l for 400 miles = £188/month.
A difference of £92/month or £1104 per year. On fuel costs alone. Stick the monthly difference in the bank for maintenance and repairs and hopefully you'll still profit nicely.
Let's say you do 425 miles overall per week (including personal driving) and you prefer to drive at 75mph, so get 52mpg out of a modern diesel. There's still a £900/year fuel saving to be had.
Your petrol car does 80 miles per day at 37mpg, petrol costing 129.9/l = £276/month
I've recently swapped to a 2l diesel. I take it easy and get 58mpg out of it, including my non-work driving. Your mileage and driving conditions may vary, but at 58mpg, diesel costing 135.9/l for 400 miles = £188/month.
A difference of £92/month or £1104 per year. On fuel costs alone. Stick the monthly difference in the bank for maintenance and repairs and hopefully you'll still profit nicely.
Let's say you do 425 miles overall per week (including personal driving) and you prefer to drive at 75mph, so get 52mpg out of a modern diesel. There's still a £900/year fuel saving to be had.