Hello Guys, As I can see on the road there are several models with different options on Corolla 121. G grades X grade XLI LX limited GLI AS I heard there are some different with Petrol consumption of these models.Specially G and X grade once are doing better on petrol compared to the other models. I'm planing to buy a 121. I know there are lots of 121 owners here. Please help me to figure out the difference between these models. I'm basically worrying about petrol consumption and reliability. Thanks, Ravee