Fall out? Are we mistaken this stuff for nuclear/radiological stuff,

Blast radius then.As I say read NASA's docs on hydrogen. It's quite scary to think of hydrogen filling stations!

The Beeb would seem to agree with you, apparently diesel in the UK has just hit a brand new record. Time for me to ditch the PD130 for a 1.4 TSI?

bbc.co.uk/news/uk-17072925

The figures are pretty simple and still clearly on the side of diesel if you do anything other than very low mileage, remember that both diesel and petrol have increased in price, and the gap has not increase (in fact probably narrowed in percentage terms).

I drive a Mazda 3 1.6 TD and have recorded an average of 53 mpg over the last 30K miles.

Over the last week I have been driving a Kia cee'd 1.4 petrol - so similar class of car - this has done a measured 41 mpg over 700 mile of very similar driving.

Mazda TD = 53 mpg = 11.77 mpLT = 85 ltr per 1000 mls. at todays price of 143.9 that = £122.26/1000mlies.

Kia petrol = 41 mpg = 9.11 mpLT = 110ltr per 1000 miles. At todays pice of 137.9 that = £151.54/1000 miles.

Therefore the fuel cost for petrol is £29.28 extra per 1000 mls.

Servicing and insurance costs will be broadly similar. Road tax may be a little more for the petrol but lets ignore that.

An equivalent diesel will cost about £1000 more to buy new but some of that will be recouped a trade in time, so lets assume the diesel will cost you £700 more over a 3 year period of ownership.

At a saving of £29.28 pet 1000mls the £700 will be recouped in 24,000 miles (£29.28x24). Therefore if you do more than 8,0000 miles a year in your 3 year ownership you are better off with the diesel.