ive recently had my egr valve and inlet manifold replaced on my sri 150 on warranty ,since then travelling 33 miles to work on a single carrageway a road and 4 miles through a city centre the veccy as been returning a respectable 51 mpg where as before the replacement 47 mpg, although thats keeping the speed within the law and accelelerating very steady still very pleased tho what do you think?