Hey i have a 2001 Audi A4 Quattro 2.8 V6. I put 20 dollars of premium unleaded and it was a little over the half way mark on the gas gauge. When i first put the gas in it said I have 200 miles left. Which i though was awesome. Well as i started driving the first 30 miles were going great and it says 170, But i went to school and when i turned it on it went down to 140! after a while it went down and i put about 100 miles on it and now it reads 35 miles. So basically im gonna get about 135 miles on 20 dollars of premium gas, Instead of the 200 it told me in the beggining. Is that correct? What do you guys think?