Well, I'm still waiting for cara's arguments ...
PS: since we're in the HS, we might as well finish this here, the 25 to 30% is between diesel and petrol, not LPG ...
Your sentence said:
(with the line change exactly like that!)"[...]nitpicking over a small difference in emissions between diesel and petrol engines
/ LPG / CNG,[...] "
mea culpa, I stopped at gasoline for my comparison ... (urban MVEG and CADC cycle).