Need help and suggestions about bad fuel economy - Toyota Yaris Forums

edmscan · 04-10-2013, 07:57 PM

I too have found that I have decreased my fuel economy in the last 6-7 months. In the summer time I was having no problems getting anywhere from 5.4 L/100 KM to 6.0 L/100 KM. But in the winter time (well since maybe November of last year) I have been getting roughly 7.5 L/100 KM. So roughly a 30% drop in fuel economy. I have seen MANY people here in YW describe that they are finding similar drops in fuel economy.

I do agree with the dealer .... what you are finding is simple winter driving issues and you will not get the fuel economy that you got in the summer time. I expect to drop below 6.0 L/100 KM. sometimes in May when the weather warms and the gas stations change to summer gasoline.

*EDIT* .. If you click on my FUELLY .. you can see the fuel economy decrease that I have been speaking about. I have spoken to the previous owner of my Yaris (he had driven my car 162,000 km of its 172,000 km it now has) .. and he told me that every year there is a drop in fuel economy in the winter time. My scangauge also shows me that I am not getting the fuel economy that I did in the summer time. BTW .. I have NOT found any difference in fuel economy by changing to different Octane gas. You are just wasting your money going to a higher octane ... 87 is just fine for a Yaris.

Personally ... in my case I have gone from a high of 696 KM per tank ... to a low of 492 KM. So I have a decrease of just over 200 KM per tank, so your reduction is not out of the ordinary to what I am seeing.

I don't think that there is anything wrong with your car.

04-10-2013, 07:57 PM	#12
edmscan Drives: 2020 Corolla Join Date: Apr 2012 Location: Canada Posts: 549	I too have found that I have decreased my fuel economy in the last 6-7 months. In the summer time I was having no problems getting anywhere from 5.4 L/100 KM to 6.0 L/100 KM. But in the winter time (well since maybe November of last year) I have been getting roughly 7.5 L/100 KM. So roughly a 30% drop in fuel economy. I have seen MANY people here in YW describe that they are finding similar drops in fuel economy. I do agree with the dealer .... what you are finding is simple winter driving issues and you will not get the fuel economy that you got in the summer time. I expect to drop below 6.0 L/100 KM. sometimes in May when the weather warms and the gas stations change to summer gasoline. EDIT .. If you click on my FUELLY .. you can see the fuel economy decrease that I have been speaking about. I have spoken to the previous owner of my Yaris (he had driven my car 162,000 km of its 172,000 km it now has) .. and he told me that every year there is a drop in fuel economy in the winter time. My scangauge also shows me that I am not getting the fuel economy that I did in the summer time. BTW .. I have NOT found any difference in fuel economy by changing to different Octane gas. You are just wasting your money going to a higher octane ... 87 is just fine for a Yaris. Personally ... in my case I have gone from a high of 696 KM per tank ... to a low of 492 KM. So I have a decrease of just over 200 KM per tank, so your reduction is not out of the ordinary to what I am seeing. I don't think that there is anything wrong with your car. Last edited by edmscan; 04-10-2013 at 09:35 PM.