[jimvw57]

Yesterday driving to work on Hwy 52, I ran into water washing across the road. Traffic was down to one lane and I slowly creeped through. Less than 2 or 3 inches deep. Not long afterwards they closed the road as it got much deeper, and set p a 14 extra mile detour. Knowing this and the fact that it was after midnight when I had to drive home, I filled the tank with some premium fuel which also was laced with Ethanol (10%) Now today my car is grumpy and doesn't want to run right. I will have it mostly used up by the end of the week, or sooner as it does affect my MPG.

If I went through the higher water with my luck, I probably would have hit a catfish or something... There were reports of cows being washed down the rivers from flooded farms..

 

[Igor Barbaros]

That's odd. I only fill up with e10 since that's the only thing they sell in my area and she runs fine and the avg is 42mpg.
I think something else is the problem

Yesterday driving to work on Hwy 52, I ran into water washing across the road. Traffic was down to one lane and I slowly creeped through. Less than 2 or 3 inches deep. Not long afterwards they closed the road as it got much deeper, and set p a 14 extra mile detour. Knowing this and the fact that it was after midnight when I had to drive home, I filled the tank with some premium fuel which also was laced with Ethanol (10%) Now today my car is grumpy and doesn't want to run right. I will have it mostly used up by the end of the week, or sooner as it does affect my MPG.

If I went through the higher water with my luck, I probably would have hit a catfish or something... There were reports of cows being washed down the rivers from flooded farms..

 

[jimvw57]

well, on my 3rd smart, first one had 17K on it before it was replaced for 'electrical reasons', second one had 165K miles when it dropped a valve, and now this one has 140K on it so I think I have had enough history to know when it is running well or not. MPG usually averages around 46-50 mpg. Have never had good luck with fuel with the Ethanol additives and any time I use it, my MPG drops as well as the power. That is what works for me in my location, with the terrain I drive on.

My Land Rover doesn't really care if it gets ethanol or not, same with the TrailBlazer or the Century. Probably because of the larger motors, you don't notice the amount of power loss.
If E10 works for you, then you should use it.