Need help, I drive a 2.2 diesel 150 bhp manual Mazda 6, I bought it because it's the most economical in the range, but I've only done 17000 miles in it since brand new, I know that's ridiculous low mileage for a diesel, but bare in mind that I now own this car with its fantastic MPG, now I'm now looking at a 2.0 164 bhp Mazda 6 brand new, I know it won't get the mpg that my diesel will get, but just how much will it get, are there any owners of this engine who can let me know please, I love my Mazda 6, but I'm torn as my car is in excellent condition, it's now 4 and a bit years old, and I wouldn't mind the latest facelift model, I'm saying facelift that was done in 2018 just before my version, is the 2.0 petrol 165bhp bad on fuel ?? I also am aware you have to push that engine to get anything out of it, mine is like a rocket, the more I'm bigging up my car, the more I'm thinking why am I getting rid of it in the first place!!! Many thanks