WHEN IT IS BELOW 25 DEGREES FAHRENHEIT, FUEL LINES AND RELATED COMPONENTS (INCLUDING RETAINING CLIPS AND FITTINGS) LEAK GASOLINE, CAUSING GAS FUMES TO ENTER THE PASSENGER COMPARTMENT. THIS PROBLEM IS SOMETIMES REFERRED TO AS A FUEL LINE SEEP. FUMES THEN ENTER THE PASSENGER COMPARTMENT VIA THE HEATING VENTILATION SYSTEM OR THROUGH GENERAL AMBIENT ENTRY. EVEN WHEN THE HEAT IN THE PASSENGER COMPARTMENT IS OFF, FUMES ENTER THE COMPARTMENT. THIS EXPOSES PASSENGERS TO HARMFUL CARBON MONOXIDE AND HYDROCARBONS AS WELL AS POSING A FIRE RISK. BOTH MY HUSBAND AND I HAVE EXPERIENCED HEADACHES AND NAUSEA FROM THE FUMES SINCE WINTER 2012 WHEN OUR FORESTER FIRST STARTED LEAKING. THIS HAPPENS AT ALL SPEEDS FROM STAND-STILL TO 75 MPH. IN MODERATE COLD (25-15 DEGREES FAHRENHEIT), THE LEAKING STOPS AFTER THE ENGINE HAS WARMED. IN COLDER TEMPERATURES, THE LEAKING CONTINUES NO MATTER HOW LONG I DRIVE THE CAR. THE PROBLEM CAN BE TEMPORARILY SOLVED BY TIGHTENING THE HOSE CLAMPS ON THE FUEL LINES, BUT WHEN THE TEMPERATURE DROPS AGAIN, THE HOSE CLAMPS MUST AGAIN BE TIGHTENED. SOME OF THE CLAMPS ARE UNDERNEATH ENGINE COMPONENTS THAT ARE DIFFICULT TO REMOVE, SO THE PROCESS IS VERY TIME INTENSIVE AND DOES NOT ALWAYS STOP THE FUMES. THIS IS A COMMONLY DISCUSSED TOPIC IN AUTOMOTIVE DISCUSSION BOARDS ONLINE. THEREFORE, I BELIEVE IT IS WIDESPREAD. HERE ARE SEVERAL EXAMPLES: HTTP://WWW.SUBARUFORESTER.ORG/VBULLETIN/F88/GASOLINE-ODOR-INSIDE-CABIN-45495/ HTTP://WWW.SUBARUFORESTER.ORG/VBULLETIN/F87