Most fuel efficient petrol cars to replace your diesel car with - Real world fuel economy THE most fuel efficient petrol cars on the roads in the UK have been revealed by new data. Here's which petrol cars have the best overall fuel economy. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:New Honda Sports EV Concept update - New car could be on the way after patent images leakTesla Model 3 sets new safety technology benchmark in Euro NCAP testingNew Vauxhall Astra REVEALED - More efficient, lower emissions and better lookingCitroen offers free car insurance on its new C1 city car in ultimate dealWhy you should never fill up your car with petrol or diesel on the motorwayMazda set to remove all touchscreens from its new cars, here’s why