I would not doubt it.

Considering many modern cars can run on e85, things like this in smaller doses work fine.

I notice in generall all my cars are effected for 2 reasons.

As coolant temps take longer to heat up so the engine can go into "Closed Loop" and start using the MAF to trim down fuel demands either we are using the remote start and allowing it to heat up idling or just driving and with the cold air. The car will use more fuel in that period of time.

 

Supposedly fuel injected cars are supposed to be more efficient with cold air. You must also add a few pounds to your tires in cold weather, as the pressure drops a bit.

I guess they use funky winter additives to lower mileage. I know in NJ, they used to use "oxygenated" gas. It cut your mileage by 10-15%, and made your car run like crap, with the exception of carburated cars, they liked it for some reason.

 

The aditional additives in better gas seems to get me about 3 to 6 more mpg Arco premium cheep gas 20mpg Chevron or Shell 5more cents 23 to26mpg the math say's more expensive gas is cheeper to run and it's got to be better for the injectors

 

My car loses BIG time in the winter. I get about 330miles to a tank in the winter, whereas I get about 420 miles to a tank in the summer. BUT, I remote start it everyday, more than once...that doesn't help. I am usually a little heavier footed in the winter (to warm it up faster).

 

Compared to Connecticut. We took a 2004 Dodge Ram 1500 with the Small v8 from Central Conn down to English town NJ. I think we averaged something like 14 MPG (not towing anything, 2 seater truck). Gased up down there and averaged 16-17 mpg on the way back. My father in law is always down there in AC and goes to the Borgata and sees similar results.

NJ gas may get worse in the Winter but still far better then the garbage we get up here.

Also I was going to remark about the tires. Just a FYI, Nitrogen does not change in pressue. I get my filled for free but its a cool process to watch someone swapping it over.

 

Here's mu take on it.

Winter time mileage is always worse for me. I'm in Western NY. There is warm up and defrost time to consider. Your car is running, but just sitting there while the windows are defrosting, ans snow is being cleared off. This destroys your overall mileage.

Summer, you can hop in and go, no wasted warm up time You can sit in your driveway while the car is warming up at any time of year, and have your "Average MPG" on the display. If you zero'd it out recently, it doesn't take long to see it start to drop. , if you are not moving, you are getting zero miles per gallon. It's as simple as that.