Fuel Efficiency and the Yaris - Toyota Yaris Forums

Naya · 03-23-2009, 09:54 AM

Hello,

I'm kinda new to this whole car thing, so forgive me if any of my questions seem a little noobish.

I have a 2007 Yaris with about 30,000km on it. I've taken it for all it's scheduled oil changes and haven't had any issues until recently.

I noticed my fuel economy getting worse and worse over time. At first I just attributed it to the cold winter (it gets pretty frosty in Ottawa) but even now that it's coming to spring, it's getting worse. When I was doing mostly highway driving I was getting about 400km to a tank (this was up until Janurary). I am now getting about 350km to a tank, running it almost to dry. Most of my commute now is city driving, not going above 85km/h.

I took it to my local dealership and they said nothing was wrong. Most of these issues seem to have started happening after my last oil change, but that might just be a coincidence. I also noticed that when the engine is cold, the transmission is really sticky. If not warmed up for at least 15 minutes, it will sit at about 4000rpm doing 80km/h and refuses to shift until brought up to 90km/h (4500rpm).

Sorry if it seems like I'm just spewing out information, but I really have no idea what would and wouldn't be relevant. I'm hoping someone might be able to give me some ideas. My dealership has been no help at all.

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03-23-2009, 09:54 AM	#11
Naya Drives: 2007 Toyota Yaris Join Date: Mar 2009 Location: Ottawa, ON, Canada Posts: 4	Hello, I'm kinda new to this whole car thing, so forgive me if any of my questions seem a little noobish. I have a 2007 Yaris with about 30,000km on it. I've taken it for all it's scheduled oil changes and haven't had any issues until recently. I noticed my fuel economy getting worse and worse over time. At first I just attributed it to the cold winter (it gets pretty frosty in Ottawa) but even now that it's coming to spring, it's getting worse. When I was doing mostly highway driving I was getting about 400km to a tank (this was up until Janurary). I am now getting about 350km to a tank, running it almost to dry. Most of my commute now is city driving, not going above 85km/h. I took it to my local dealership and they said nothing was wrong. Most of these issues seem to have started happening after my last oil change, but that might just be a coincidence. I also noticed that when the engine is cold, the transmission is really sticky. If not warmed up for at least 15 minutes, it will sit at about 4000rpm doing 80km/h and refuses to shift until brought up to 90km/h (4500rpm). Sorry if it seems like I'm just spewing out information, but I really have no idea what would and wouldn't be relevant. I'm hoping someone might be able to give me some ideas. My dealership has been no help at all.