Prius c gives me 16Km/ltr. Help me.

It takes attention to how heavily you use the gas pedal, and how easily you brake. If you are using the gas pedal all of the time you are not giving the car its opportunity to exhibit its ability to glide. The more it glides, the higher your gas mileage accomplishment will be. Braking, if done well, will maximize the hybrid battery for longer periods of electric driving. Electric driving can't really happen if you keep the foot down on the accelerator.

 

That is unreal, your getting 10 mpg ! You should be getting 40-50 mpg. It is a hybrid, right? Study Prius Hybrid Generation 2 basic maintenance instructions. Go over each one, doing the simplistic first. Somebody screwed over that car bad. Good Luck

How you drive makes a small difference, in this case you have maintenance problems.

Gen 2, Maintenace and Troubleshooting.

Jack your car up and make sure all wheels spin easily, in neutral.

You have a pisspooor mechanic.

 

welcome to priuschat!

16 should be about 37 mpg instead of 50 rated. i would start with the sticky that asks a number of questions. those answers will help us help you.

in the meantime, check the health of your 12 volt battery, and pump up your tyres. make sure they are all the same model and low rolling resistance. check your oil level and air filter.

 

Gas mileage for the first few kilometres is very poor because the engine runs to warm itself up in preparation for intermittent use. So if you're doing a lot of short trips then that would probably explain it.

 

I don't buy that, not 10 mpg. I have a C also, I always get 40-50 mpg with higher trip.



Merged.

Sorry, I computed wrong, should be 14 miles X 3.9 or 54.6 MPG. THAT IS ACCEPTABLE. if you want better mileage you have to drive conservatively and let glide as much as possible. You know, you can also let it glide in neutral, then it uses NO energy.

 

You computed wrong again! Bisco is correct at about 37 mpg.
Kilometer per liter to mile per gallon (km/l to mpg-US) Fuel consumption or fuel economy conversion table

 

Gee, rocket scientists we may not be, but it is a simple thing. Recently because of rushes to get to places I have been running it hard and getting low mileage. A liter is a bit more than a quart. 4 quarts are a gallon. If we mix metrics with standard then it is 64km to approx a gallon. Sure I could use a calculator. So converting comes to about 39.

37 is close enough. Either way, we tend to cry if it is in the 40's. You had a dealer check it. About the tires/tyres however you spell it, you should use low rolling resistence tires. You also want to make sure that the wheelbase of your tires matches the original spec for the model of the car. Check about additions to the car, or what you added as carry weight. Put in a bottle of Techron. And I second the suggestions made by bisco.

 

andy, andy, andy...

 

The 16 km/l that the OP refers to is 6.25 litres per 100km, which is actually pretty good for short trips, considering it usually takes me about 1km of travel to get the fuel consumption down to below 10 litres/100km. So I think his report is very consistent with trips of only, say, 5 km or so. But of course there are a lot of other variables such as hills, temperature and weather conditions that also play a very big role, not to mention how aggressive he is with the accelerator.

 

37.66 mpg, to be more precise, but let's not quibble...

Obviously, driving style, short trips, etc. could bring it that low...

 

A weak 12v becomes parasitic and unstable.

 

Some (not all) failure modes of a 12 volt battery result in one shorted cell, so it can't charge above 10 volts. If this happens the inverter will expend continuous power trying to charge it back to over 12 volts, uselessly. Power that could have gone to propelling you down the road.

Remember the 12 volt battery powers the computers, so they cannot test the 12 volt battery as it's failure modes cause the computers to become unreliable.

 

Ultimately the number of litres you pump into the tank and the number of kilometres you drove since the last fill-up give you the true fuel economy, assuming you fill the tank equally both times. There's always a slight bit of variation on how full you can get the tank, but it's the most reliable indication of fuel economy.

I find that the l/100km fuel consumption reported by the Prius C is always a little bit optimistic. The true fuel economy as measured by litres pumped is usually around 5% more than that indicated by the car.

 

In regards to fill-ups, there is no way to determine when the tank is full, it could vary by a gal each time you "fill up" just accept the cars computerized figures.


Merged.

Sorry, I was using 22-24 Km/Ltr, // so, 3.9l to a gal // and 16Km/ l X ..625 = 10 mpg X 3,9 = 39 mpg

So we are back to unacceptable again, however, if the Op has improved this by better driving techniques, then the matter is solved.

To the OP: Welcome to Prius Chat.

 

Interesting.

 

Syed, even a mis-calculation of .1 of a gal can result in a error between measured and Prius computerized read outs. Professionals that measure fuel consumption in a laboratory environment are also beset by factors they cannot control. Pressure, temperature, etc.

 

Mileage depends heavily on traffic conditions and time of day you drive, if you are constantly driving during congested hours with lot of stop and go traffic and during midday when the temperature is high (its around 36C here in LK so I suppose its equal or worse in PAK) then its not that surprising.

Anyway check the tire pressure, Toyota recommended is 33 psi but if road conditions are poor stick to 31 or 32 psi, also check if you are driving in ECO mode.

Also be aware that the odometer can be changed so the 71k (or 14k for that matter) might be not the actual.

I've met Aqua owners who have achieved more than 37 Km/L during long trips but do less than 20 in city.