AndrewG:
Relatively cheap in bulk but will still add weight. Ive specced my FH with the largest adblu tank at 110 litres and relatively insignificant compared to the 1480 litre diesel tank but…it still at least an extra 110kgs ( considerably more with the adblue heater and other associated components) all in the name of emissions.
Other issues are cost to repair when the system goes wrong. Couple this with a fleet of trucks and its not surprising some go for the cheap option of fooling the ECU with a cheap plug in…
Tanks you mean surely!