Gas Mileage Went Down 11 MPG

I know our fuel blend changes for winter hurting mileage too. With our hills I usually get more than that. Must be too much fast food. Filling stations are for the car, not you.

 

I first read the title as mileage went down to 11 MPG and I thought you really decided to take advantage of your beloved Power mode.

I actually showed just over 11 MPG at the end of our 0.4 mile street. I had let the engine run a few seconds to try & get the frost off the windshield, though. Home said temperature was 31. Prius said 36.

 

is that measured by the tank?

 

The weather here was around 75 degree it went down from 71 mpg to 62 mpg. Normal here is around 95 degree . The weather has a lot to do with how the Prius function.

Posted via the PriusChat mobile app.

 

Some possible factors for mpg decrease this time of year:

-extra cold start mpg penalty during winter, most severely effecting trips of only a few miles (due to longer time for engine to reach optimal operating temperature)
-loss of tire pressure in winter (increased rolling resistance)
-use of heater/heated seats/window defrosters during winter
-more air drag from colder/denser air (for highway driving)
-winter grade gasoline (less energy dense than summer blend)
-decreased battery performance when cold
-if present, ice/snow (and rain which California gets most of in the winter)

 

It's that time of year.....

1. Set clocks back.
2. Drive home in the dark.
3. Put spare change in the kettle in front of stores
4. Listen to Prius drivers complain about mileage.

I'm into the 40's in the morning, and it cost me a few miles per gallon, but Priuses are still pretty fuel efficient.
Like........VERY fuel efficient.

My truck never loses any inefficiency during the winter. I still get 20-21 MPG.

 

And don't forget wind... in many areas of the country, there are increased winds in late fall and early winter.

For OP, is it possible he lives in an area that gets Santa Ana winds?

I drove into a 20MPH headwind the other day, and my mileage dropped by 7 or 8 MPG compared to the previous 2 days, which had light winds and similar temps.

 

The 4th gen is reportedly much more willing to run electric-only. Even on cold starts? Maybe the car's computer has a minimum ambient temp requirement for that? And once temps drop it reverts to more 3rd gen behaviour?

I find it concerning that Toyota has chosen to use the pack so much more, hope it doesn't backfire. I'd rather have low 50's for mpg, and a more pampered pack.

 

My measurement was from startup, so about 0.4 miles

 

Yes you are right. Well in Power Mode we tend to glide longer than Eco Mode or Normal . I did it this morning in Power Mode.

Posted via the PriusChat mobile app.

 

I might give it a try once I stop improving in Eco mode. My average per day this week appears to be slightly over 58. I think last week was 51.
Car just turned over 3000 miles.

 

It like Bisco said same thing we do in Eco Mode do in Power Mode. Here in Miami is always 95 degree so that help. My speed was between 60 and 65 mpg.

Posted via the PriusChat mobile app.

 

sorry that was for the o/p, but your making my point. you can't judge mpg's by trying to watch the dash.

 

I know that, I was just making fun of @Coast Cruiser since he has been boasting of a constant 62 mpg.

 

Your speed was between 60 and 65 for the picture (post #12) above? If I am reading right, it took 1 hr, 12 mins to go 35 miles, which is about 30 mph?

 

My speed was always between 60 and 65 mpg the whole time . I was in the freeway . The first 10 miles of this trip the speed limit is 45 mpg . I do 90 to 100 miles per days. I am going to work. Pretty much is always the same. How you come up with 30 mph as the average.

Posted via the PriusChat mobile app.

 

You do 90 to 100 mpg per day???