Yep, the litres used is always lower by about 10%(well just under) then what it says on the trip computer. ie if it the trip meter says you've used 60L it really is only about 54L used. Also the range on the trip computer(on mine anyway), is calculated with 60 litres in the tank, and not the actual 70 Litres that is really in the tank. so the trip meter will read LOW once it reaches 60 Litres, and the orange indicator will light up shortly after that. (which is the common practice, as you should not allow the petrol level reach too low, as stated in the owner's manual). With the debate over the RON level to use. There are differences in the fuel efficiency. I usually stick to 95 RON, but pour 98 every now and then, only if i am at BP or Shell, just because i don't wanna be rorted that extra 1/2cents by Caltex and Mobil(haha). I have tried all the below(except synergy 6000) and would usually stick to petrol @ either BP or Shell. Caltex fuels seem to be lower in efficiency(Mobil; just don't seem to be anywhere near one when i pour petrol) The Fuels currently available on the market are(other than unleaded): Company - Type - RON (Price premium over unleaded) Shell - Unleaded 95 -95 (+6c) Shell - Optimax -98 (+10c) BP - Premium -95 (+6c) BP - Ultimate -98 (+9c) Mobil - Synergy 6000 -95 (Don't know) Mobil - Synergy 8000 -98 (+11c) Caltex - Vortex 95 -95 (+7c) Caltex - Vortex 98 -98 (+11c) About my efficiency, i don't think you'd wanna compare mine to yours, as i have 235/45R17 which is wider tread than the normal, and also larger in diameter, hence will use more petrol just because of those two factors. Pressures are kept at 34PSI. From nearly 20000km of driving(from new) the overall average is 13.67L/100Km. The minimum i have achieved is 12L/100km(only half a tank)in city driving, and 11.2L/100Km in country driving. But all those numbers are all dependent on the way you drive. Thats all for now.