Hey everyone, i just got myself a 2000 Toyota Celica 7th generation SX GT and was wondering how long tank should last me. I have filled up twice now, full tank which is about 55 litres and it only seems to last me 450km. I don't know why i use up it up so fast, i drive mainly to university on a 70-80 km/hr road with quite a lot of stop and start. It says i have to use premium unleaded petrol only, what will happen if i put 95 unleaded? Any advice, thanks for reading.