I have an 06 vrscr and it went all the way down to the E today with the digital gage reading r low... assuming the r is for reserve. Before it read low it said 19m which I'm assume was 19 miles left before empty. But that 19m disappeared in only 4 miles of driving and went to the low. To the point though after was to the very E for empty.. I put 3 gallons in only and was completely full on gage and could see in the tank was to the top full. What gives if a 5 gallon tank?