I am a new member and this is my first post. I just recently purchased a 2011 White f150 FX4 Crew cab and so far it has been a great truck! I always keep my vehicles with a half tank or more and have never had a problem starting them on my steep decline driveway until today. Earlier this week I had 3 quarters of a tank and when I started my vehicle in the morning it warned my I only had 6 miles until empty! I knew this wasn't true and didn't think anything of it. drove down to the flat and the gas gauge of course went back to normal. This morning I was unusually low "just under half" remote started my truck and 5 minutes later went outside and realized my truck wasn't running. I figured it just didn't ever actually start until i tried turing it over and nothing at all. tried for about 5 minutes after calling my ford dealer and asking about the problem. I put 3 gallons of gas I had in the garage and it started right up! Be careful on parking on a decline with less then half a tank!