Getting great gas millage now i cant get above 45 computer

Have you read This Thead Yet?
YEs i have

- What fuel economy are you getting and how are you determining fuel economy? (trip computer or manual calculations)
IN the 2 months i have had my 2010 Prius V i was getting anywhere from 55-58 computer. My hand caluc show about 3 better on the first several fill ups
Now im getting 35-40 and no matter how hard i try i cant seem to get it up above that

- What fuel economy are you expecting and why?
I was expecting better because i was getting better and not sure what happened

- What are the approximate outside air temps?
It has been 80s and 90s. I say 80s and 90s because the temp has been back and forth on each tank. We have had nice days and then days in the mid 90s so id say low 90s average
- How long are your trips?
They vary from 15 miles to longer. We go the same places all the time gym, walmart and such.
How old is your 12v battery? What is the voltage reading of your 12v battery after sitting over night? (Method Here)
I have no idea i assume its part of the original car as i cant find that anyone replaced it in the toyota repair logs. I have not checked it because i dont know how on a 2010

Have you had your alignment checked? Any pulling or abnormal tire wear?
I had it allined about 1 month ago
- How much of it is city vs. highway? Roughly what's the average speed in overall and and of each segment? Is there a lot of stop and go driving?
yes stop and go and its cmbo city highway because when i work i deliver so its just me in the car and its all city
- What's the terrain like of your drives? (e.g. flat, gentle hills, steep hills, etc.)
Flat and gentle hills nothing steep around here.
- What are your tire pressures?
i have 50lbs in each. i have had it that way since i got the car
- Is your oil overfilled? (i.e. above the full mark on the dipstick)
no
- Make, model, year, engine and transmission of previous car? (e.g. 08 Honda Civic Si 2.0L 4 cylinder, manual transmission) What did you actually get on the same trips/commute? (Please give us actual numbers, not EPA ratings.)

- What region/state are you in? (if you haven't set your location)
gardner, ks
- How are you trying to drive (e.g. trying to stay in electric only?) and how hard are you braking?
im trying to stay in electric in fact people on the highway i think get mad becuase its 70mpg speed limit and im driving 55 up the hill and then 60+ down.
- What modes are you using, if any? "normal", EV, power, eco?
Try to always use Eco mode because i read it makes the AC run more effient
- Are you "warming up" the ICE (internal combustion engine) by letting it idle after powering on?
no i typically get in and go but i have done that since i got the car

- Are you driving using D or B mode?
not sure what that is
- HVAC settings? Are you using the heater, AC, auto mode, etc.? If using auto, what temp is it set to?
AC and i dont use auto i try to keep it 78 or 79 with fan on medium or 1 notch above. Except when cooling down the car i turn it on high for a minute or 2 if the car has been sitting all day.

- Are you using the factory tires and wheels? If not, please indicate tire make, model and size (e.g. Goodyear Assurance Fuel Max 185/65R15).
215//45/17 khumono
- If reporting a mileage drop, did anything significant change on your car (e.g. accident, hit a curb or big pothole throwing off alignment, oil change/other maintenance/repairs, changed tires or wheels, etc.) or your commute?

Nothing has changed that i can think of. I am about due for an oil change but other then that i cant see. I have talked to a few on here about putting 205 50 on here for better gas milleage but at the time i was doing pretty good so didnt see the need.

 

Exactly what do I do to test the battery?

 

Will check brake. I never use it.
As far as the ac I use recercylate I always was told it makes the ac work less because it just uses the cold air inside the Canin vs cooling 90 or 100 degree air from outside.
I don't use auto I thought that was bad. Yea I typically roll up the windows and leave a little letting hot air out without being all the way open and after a couple minutes I turn ac up and windows up.

How do I get the nav into main fence mode? In on a 2010 I thought that was only older?

 

What are we talking price wise for the battery in this? Both 12v and traction.
My neighbor was saying the big battery will cost 4-5k to replace. That seems excessive.

 

I check them every few days

 

I have not recently. I am about due for oil change. And plan on putting in amsoil 0w20. But even that would not cause such a huge drop.

 

I use D mode then. I know B is only for like mountains and stuff.
I can check the air filter i havent looked at it yet
I run 50LBS in the tires or 49. Thats more then i see anyone here running. But again i have not changed that since we bought the car

I got into the maintenance mode but all i get is the 3 things it checks all say OK. SO i dont know where i can find voltage that everyone talks about seeing.

 

OK what am i looking for and how to i check with a voltage meter?
Sorry if i ask to many questions. But thank you all for all the help you provide it means allot

 

Did a 10 mile stretch up and down 56 hwy here like you said. Got 45mpg at the end. I will do it again tomorrow morning.
I drove for work tonight stop and go around town got 45mpg as well driving 50 miles I think.