This is a general question about cars, but apologies if I am in the wrong section.
Question 1: When you look at the official figures for fuel consumption, can you assume that regardless of the make of car, the figures were obtained by a standardised procedure and so are comparable across manufacturers?
Question 2: I am aware that all sorts of factors affect fuel consumption in the real world, driving style, loading, conditions and so on. Is it safe to assume that the same factor will have the same effect on fuel consumption, regardless of the make of car. In other words, let us say that the way that I drive effects fuel consumption by a factor of x, is this x a constant regardless of what car I drive. If so, then fuel consumption figures remain comparable (if not accurate) but if not then fuel consumption figures are not comparable from one make of car to another because environmental factors each have differential effects depending on the manufacturer.
I doubt that there are controlled tests but does anyone have a view?
mel
Question 1: When you look at the official figures for fuel consumption, can you assume that regardless of the make of car, the figures were obtained by a standardised procedure and so are comparable across manufacturers?
Question 2: I am aware that all sorts of factors affect fuel consumption in the real world, driving style, loading, conditions and so on. Is it safe to assume that the same factor will have the same effect on fuel consumption, regardless of the make of car. In other words, let us say that the way that I drive effects fuel consumption by a factor of x, is this x a constant regardless of what car I drive. If so, then fuel consumption figures remain comparable (if not accurate) but if not then fuel consumption figures are not comparable from one make of car to another because environmental factors each have differential effects depending on the manufacturer.
I doubt that there are controlled tests but does anyone have a view?
mel