Debating the petrol vs diesel purchase for a 100 series.
Petrol 137.9 Diesel 149.9/l today in Herts.
According to official mileage figs (so I'Il use those) the fuel stats are thus:
Tank capacity 21.12gal
Petrol 17.3mpg = range on full tank 365 miles
Diesel 26.6mpg = range on full tank 561 miles
Thus....
Petrol range = 365miles = cost to fill ~£132
Diesel range = 561miles = cost to fill ~£144
So spending the same £144 wood buy an extra 1.9 gal of Petrol, giving one an additional 33 miles = 365+34.6 ~ 400miles
Difference of 161 miles or ~9 gals of petrol to achieve same distance travelled.
Hmmm so for every full tank of Petrol, and in order to achieve the same mileage as a Diesel, I'd need to spend and additional £56.
thats about 11 tank fills over 6,000 miles = about £615 more for petrol.
I could of course look at installing LPG, but according to my calcs I"d need to drive for ~18,000+ miles before I broke even on costs.. assuming there is no damage to the truck.... so for about 3 years I'd be no better off...Then of course I have to find an LPG station and the nearest to me is a 14 mile round trip!

sounds like too much of a faff to me.
Then there is the whole Bio/UVO debate... also sounds like a headache and a hassle to save a few shillings. Thats after I've had to fork out at least an extra £4-5K to buy an equivalent diesel in the first place.
So on balance covering 6,000miles per year, I recon there is little meaningful difference. Me thinks life is a little too short to waste on trying to save £50pm.