I have an o3 blazer and have never had worse than 14 mpg. Now down to 12, The last service the guy that parked the car used the parking brake and I was concerned it was dragging, all wheels freewheling, and a guy at the shop with an 03 is experiencing the same thing. I had a no start at 12 degrees, some heet and jumper cables finally got a start after an hour. Cranked well but it was like it was trying to start on one cylinder. Thinking gas line freeze and heet fixed it. No codes thrown, mechanic guys doublechecked. I had moved the car 5 feet at 2 below to accommodate an extra car in the drive and had a bad feeling about that. 20 degree today and still starting fine.
2 Below in the am predicted, so I replaced the end section of the block heater cord as I think it was trashed by bouncing around in the wind, and from no continuity, now continuity. Sure the block heater may work but scared by my first no start, and have the rental car companies on tap in case the car does not start to spring dear old mom from nursing home to assisted care after hip replacement.
Is gas going bad?