And, assuming I ever proceed beyond a mere 2 litres (

I suppose I'm asking: What is the ULTIMATE XM...?
(Or should I consider the 2.5 diesel???)
(Be gentle, I haven't been around XM's as long as most of you here

If you consider 10% +, give or take, is significant, yesAnd, assuming I ever proceed beyond a mere 2 litres () is the fuel consumption going to significantly dent my enjoyment?