My fuel efficiency graph over 100000 km's worth of fillups

Thanks for the info Eug. That looks like a pretty low average. Just visually it looks like an overall average of only about 6.8L/100k (34 MPG).

 

It would be interesting to have summer and winter labeled.

 

Nice Tracking. 100,000 km is barely broken in

Below is the tracking I do. I stopped putting in fuel economy in late 2006, but I continue to track all repairs and maintenance you might find interesting. Distance units in miles. Cheers!

 

Location ? Canada's a big place.

I assume you haven't modded the Prius given what you said in the OP.

 

I think parking outside in TO is a mileage killer. Our trips are fairly similar to yours, but some differences:

1. West coast of BC, more temperate winters.

2. Garage kept, so no hassles defrosting windows, and a bit warmer.

3. Block heater used, religously, for the first start of the day.

4. Last but not least, and this one at least you could try: we keep it in ECO, stay at or under speed limits, and generally accelerate very gently, though we're not nuts about it. Also, tend stay in the right lane, and just generally drive conservatively.

If I'm driving I've typically got that bar graph of fuel economy displayed, I'm checking that and the real-time fuel consumption meter, and do what I can to keep the consumption down, or bump it into electric mode.

We've had the car since mid-November of last year, and I just got in gear about tracking mileage in a spreadsheet as of Jan01/11. To date the average calculated "mileage" is 5.0 liter/100km, with the in-dash reading 5.4.

This is using 195/65-15 Michelin X-Ice snow tires, on steel Corolla rims, at 40~42 psi. I'm not exactly sure what's going to happen, going back to our stock Michelin Pilot 215/45-17 on alloys, it might be a wash, due to the wider tire, not sure.

 

I got my '04 just last December, and started off with a 38 MPG average in Vancouver winter weather parking outdoors. Between a 80% grill block, block heater install, and Michelin Energy Saver tires at 44/42psi I'm up to 50+ with careful driving. A significant difference, try giving those mods a shot. Your heater will be hotter sooner with the block heater too.

 

That Toronto cold weather, being parked outside, city drives and quick acceleration all contribute to the mileage the OP is getting. If he wants to improve it, at minimum, grille blocking during the winter should help a bit besides better heater use while the ICE is cold along w/not warming it up.

That 36.8 is fairly close the to 35 mpg city that CR achieved at http://web.archive.org/web/20080618...-advice/most-fuelefficient-cars-206/index.htm.

 

We had similar issues with (Honda) dealership bleeding tire pressures back to specification. I found if you draw it to their attention, they'll leave your pressures alone. Or they'd readily put them back up if you notice it post-service, before leaving the dealership.

Also, hand pumping automotive tires is a chore: gas station compressed air is much more convenient. In our area at least, Chevron air is still free. :thumb:

Try to add air at a nearby station, when refueling. If you must raise pressures on fully warmed up tires, check them with a reliable gauge prior to adding, note how much they've risen, and adjust your target pressure accordingly (aim high). You can always overshoot a pound or two, and then check them cold the next morning.

The few times I've had to start up the car when it's been parked outside and frosted up, I'm always amazed by the time/gas it takes to get windows clear. A garage, or windshield cover or whatever, will make a big difference.

 

You can buy custom-made windshield covers on eBay to prevent frost. They work great, just put it on the night before, and take it off before you drive. No need to scrape ice.

 

How to access 100000 km efficiency graph? Mike