During the week you have been running the FMM, you admit to using the a/c while driving. It is likely then that your Volt may have also been carrying out battery maintenance procedures during times when the car was parked and/or overnight. This consumes battery power. If you have not plugged into the grid since the FMM started, this use of power would contribute to any changes in estimated ev range (are all 10 power bars still green?). Even if you have plugged in each night, this battery activity itself could contribute to a recalculation of anticipated range.Why is the car losing EV Range while it is in Fuel Maintenance Mode?
What did you do when you drove an ICEr? You had no choice but to park a warm car in the garage. I wouldn't worry about it and just let FMM happens when it does. If you want to postpone it, add a gallon of fuel. On the other hand. Not ever hitting the dino juice means you're not going out much, head to Seattle or some national park or something.having bought mine in March when should I expect it to enter FMM? should I start trying to burn some off now? I don't mind the idea of burning gas on the way into work as it can cool down in the parking deck but really prefer to come home pure EV as it doesn't heat up my garage
At this point, I'd just start using the Volt for longer trips. A couple of 200 and 300 mile trips and the gas will be gone before you know it.having bought mine in March when should I expect it to enter FMM? should I start trying to burn some off now? I don't mind the idea of burning gas on the way into work as it can cool down in the parking deck but really prefer to come home pure EV as it doesn't heat up my garage
The Volt will run Engine Maintenance Mode (EMM), starting and running the gas engine for approx. 10 - 15 minutes, once every 6 weeks if you don't otherwise use any gas. The Volt will enter Fuel Maintenance Mode (FMM) every 12 months, FMM will start to use all of the fuel in the tank. If you add fresh fuel to the existing fuel in the tank the Volt will compute the average age of the combined old and new fuel that is in the tank. Adding 1 gallon of fresh fuel to 8 gallons of old fuel will not delay FMM for very long. If you add 4 gallons of fresh fuel to 4 gallons of old fuel the average age of the fuel will be reduced by half, delaying FMM from running for up to 6 months.having bought mine in March when should I expect it to enter FMM? should I start trying to burn some off now? I don't mind the idea of burning gas on the way into work as it can cool down in the parking deck but really prefer to come home pure EV as it doesn't heat up my garage
During a Fuel Maintenance Mode operation, Hold Mode is superfluous. Once the computer determines the "average age" of the gas in the tank is ~12 months old and you say Yes to the FMM request, the ICE starts up and you can’t run on battery power again until something is done to reduce the "average age" of the gas in the tank.Put it in hold and run her out.
The Fuel Maintenance Mode (FMM) occurs when the computer determines the "average age" of the gas in the tank is ~12 months old. If you bought a brand new Volt in March and if the dealer filled the gas tank for the first time just before you bought it, the gas in your tank is now ~5 months old. The FMM won’t happen for another ~7 months.having bought mine in March when should I expect it to enter FMM? should I start trying to burn some off now? I don't mind the idea of burning gas on the way into work as it can cool down in the parking deck but really prefer to come home pure EV as it doesn't heat up my garage
You don’t know if your car is losing ev range or merely experiencing fluctuations in ev range estimate calculations since you can’t run the Volt on battery power until the FMM in completed. I’m not sure if the variations you see in the estimated ev range are significant (i.e., something is actually consuming net battery power as you drive), or merely changes in the on-the-fly range calculations (do you equally wonder about the changes in gas range estimates when running in Electric Mode?).I indicated that I would see what happened when I drove without the air conditioner, while in fuel maintenance mode. A 5.5 mile trip still reduced by EV range by 2 miles. (This trip is mostly uphill and would usually reduce my EV range by about 10 miles.) I then turned on the air conditioner for a shorter trip and it reduced by EV range by much more. So it seems that even in fuel maintenance mode, the Volt will not necessarily work the engine hard enough to maintain EV range. My understanding is that fuel maintenance mode is like hold mode. So that raises the question of what the Volt does when it the EV range is zero. Perhaps the engine works harder when EV range is 0 than it works in hold mode/fuel maintenance mode when there is EV power available?
Are you fifty miles one way? Mine is fifty four round trip, my return leg is longer than going in because traffic changes enough to warrant it. On my Gen2 I am averaging 66/67 on the guess o meter. Now except for brief portions of my trip, figure eight to ten miles max, which are at 55/65 speeds most of my trip is on 35/45 country roads.With all these people talking about the intricacies of FMM (and EMM) I've never seen either. My 50 miles per day commute means I hit dinomjuice daily unless I hypermile like a crazy man or happen to get the one free charging station near work. .
I have 50 miles round trip, but am driving a G1, rated for 38 miles of range, and I think the best I've ever done was 52, but that was driving like a grandpa. I now slapped on 18" wheels and drive like Jeff Gordon, so the trip is a who lot more fun, but I will never achieve 50 miles of EV range without a charge in between.Are you fifty miles one way? Mine is fifty four round trip, my return leg is longer than going in because traffic changes enough to warrant it. On my Gen2 I am averaging 66/67 on the guess o meter. Now except for brief portions of my trip, figure eight to ten miles max, which are at 55/65 speeds most of my trip is on 35/45 country roads.