Ok, old post, but here is what I do, and never have I had a problem with fuel issues.
1. I put in a quart of Power Service Fuel Additive (red top bottle-black top bottle or the cleaner which is the green top bottle) if either/or the following conditions are going to exist.
a. When I am in traveling status for several days. I add one bottle fuel treatment to every third fuel up. NOTE: I never let the level in the tank based on the fuel gauge to go below 1/2 empty.
b. When I know I am going to lay over for at least 7 days to months in a place, and I have a full tank of treated fuel prior to stopping period.
c. If circumstances require me to drive in/through/be in area where the weather is going to be cold below 35F or below. I treat the tank every fill up if transiting an area, or stopping for a period like B above.
Carry one complete set of fuel filters for the genset, ISL or ISC engine you have in your coach and if HH equipped, a spare filter for that unit too. Loves and other truck stops use bio fuel and the percentage is not supposed to be over 10-15%, but my guess is it's much higher than published, hence my every third fill up treatment routine. Wal-Mart seems to have the best prices on the three different types of Power Service Fuel Treatment. It's in the mid 20's here at night, where I am all week, and I have no fuel issues with the HH unit.
Points to consider: I never overnight without a full tank prior to the stop. Why, emergencies might require me to get up and leave before a regular departure, and it might be such an emergency that I don't have the time to stop for fuel. I know based on how my coach works, if my tank is full I can count on between 800-1100 miles before I will have to fill it up again, if I need to be moving that far quick. I know that I have driven between 300-450 plus miles if the fuel gauge is down to 3/4 full (1/4 down). I know that means I am going to purchase about 45 gallons or so of fuel. I know that if I am down 1/2 tank, I am going to purchase around 70-90 gallons of fuel, depending on the terrain and speed. I try to keep my speed between 60-63 mph, which gives me the best speed/distance in a driving day, it's also a safe speed in case I need to panic stop. If panic stop conditions present, I try to engage the emergency flashers while doing this stop so drivers know something is going on they need to be aware of, it might have prevented a rear end collision the other day, when the car stalled in the middle of the road without warning and I need to stop quick.
I have never been in temps below about 18F at night, and no problems. I hopefully am prepared with how I treat my fuel, so far no problems. Some may think I am wasting my money, well it's mine to waste, and an ounce of prevention is worth a pound of a cure.
NOTE: I make it a point to plan my fuel stops based on a 250-350 travel day. I only stop at Flying J or Pilot stations, why, I get the best discounts at those stops, I know the fuel is clean, I know in the winter starting around the middle of October, they start to treat the fuel for winter driving, did I mention I get a good discount with them.
Monty & Janet - 2007 Alpine APEX 40 MDTS
S/N - 75715 - Retired - Master Certified RV Tech