Total Miles: 43924kms Tank Miles: 629.4km MFD Avg: 4.6L/100km Calc'd Avg: 5.04L/100km Fuel Added: 31.741 litres Cost: 31.87 Price per litre: $1.04
I'm finally catching up with things...starting reseting each tank in Feb when I hit 20,000 miles- 3/6/2007 216.2 mile 4.479 gal 48.2697 MFD showed 43.8......
<div class='quotetop'>QUOTE(Tideland Prius @ Mar 9 2007, 03:44 AM) [snapback]402699[/snapback]</div> Ok. What I don't really understand is the apparently very large discrepancy between calculated mileage and MFD display! Since the purchase of my Prius about a month ago I've filled up two times, with the first saying 5.1L/100km (or 46.11mpg US) and the second saying 5.0L/100km (or 47.04 mpg) on the MFD. But when I calculated the amount of kilometers driven divided by the amount of gas added I get far from these figures. Both times it averaged out to something like 5.5L/100km (or 42.76) and 5.65L/100km ( or 41.62 mpg). Isn't it a bit off to be more than 10% whacky? I've read people saying 2 mpg off, but this seems suspect. Am I really the only one who is finding this big of a gap? Am I math dumb? Or am I missing some basic concept of how to calculate tank mileage? I do realize that two tanks may not be enough to judge by, but is there anything else that I could take into consideration? And before anyone replies, I do know about filling the tank slowly, and this is perhaps the reason I was able to get in 39 liters the first time and 37 liters the second time. Thanks to all that take the time to share their experience! JP <div class='quotetop'>QUOTE(Great White North @ Mar 12 2007, 10:47 PM) [snapback]404576[/snapback]</div> ...and then of course I look back at Tidelands figures and realize that he is 10% off with the 4.6 to 5.04 gap as well. So...um...is it only us two then? (he added sheepishly...)
<div class='quotetop'>QUOTE(Great White North @ Mar 12 2007, 08:50 PM) [snapback]404576[/snapback]</div> Don't forget we're heading towards spring so the temperatures are getting warmer which means the bladder is expanding which means we can add more fuel into the tank each time we refuel. I'm not too bother about the miscalculations since I know they'll average out. My lifetime avg is 5.1L/100km. My lifetime MFD avg is 4.84L/100km so it's close enough. Also, I can tell there's more fuel in the tank and the bladder is expanding because I'm able to go further before the 1st pip disappears. The last tank, it disappeared around 78kms. This time, it's 110kms even though my mileage is worse (currently sitting at 5.0L/100km).
<div class='quotetop'>QUOTE(Tideland Prius @ Mar 13 2007, 01:47 AM) [snapback]404702[/snapback]</div> Wow. My first "pip"/bar hasn't disappeared yet for this tank and I'm at 157km. These things are really inconsistent. Still love the car though. And yes, I didn't really consider the fact that the bladder could hold more fuel with the warmer temperatures. This was the information I was looking for. Thx again.
<div class='quotetop'>QUOTE(Great White North @ Mar 14 2007, 12:03 AM) [snapback]405239[/snapback]</div> whoa... 157km would be what I get in the summer!! They must've changed the bladder to a more flexible version haha.
I'm averaging about 5.3 L/100km for March. We had weather down to -20C for a week or so. I blocked the front with pipe insulation (2 stripes on the top and 2 on the bottom) so I didn't notice when the temp dropped from -10C to -20C. I've only done 4 fill-ups though, having an odometer reading of 2700km. I'm only able to fit around 32L of gas once the last bar starts to blink. I hope it picks up in the good weather. I'm not anywhere near the 'official' consumption.
<div class='quotetop'>QUOTE(spudnique @ Mar 20 2007, 11:05 PM) [snapback]409428[/snapback]</div> 5.3 is really good for that kind of temperatures. A "normal" west coast driver would get 5.6L/100km in the summer time! Also, 32L in the middle of winter is about right. It's pretty impressive if that was in -20°C weather. Last summer, when I got my record tank, I squeezed in 38 litres only.
Pulled into work parking lot this morning. I experimented with a new route. It's out of my way, taking my off my normal direct-shot drive. I can't say for certain that it's a better route because it's 37F and raining this morning, but it felt better. Fewer stoplights and a more moderate average speed, that's for sure. Current tank miles: 370 Current tank mileage: 55.7
<_< For over 2½ years, I have kept "tank by tank" records on my original '04 Prius and now my '07 touring Edition. I have found that the MFD is more than 98% accurate when compared to the pumped fuel/miles traveled. A single tank comparison cannot provide an accurate result. My accuracy is over MANY fuelings. >98% is "close enough for government work" for me.
Total Miles: 44570.6kms Tank Miles: 646.6km MFD Avg: 4.8L/100km Calc'd Avg: 4.92L/100km Fuel Added: 31.812 litres Cost: 33.85 Price per litre: $1.064
<div class='quotetop'>QUOTE(barbaram @ Apr 2 2007, 03:40 PM) [snapback]416547[/snapback]</div> And here: This was about 10 days ago. I filled up last Wednesday after about another 100 miles, 65.2 MPG (calculated) for the tank.
<div class='quotetop'>QUOTE(JimboK @ Apr 2 2007, 01:12 PM) [snapback]416580[/snapback]</div> bah! lol It hailed (and snowed in some places) last night.. and we're in the PNW!!!! tmrw it'll be 59F, then back to 50F.. what gives....
<div class='quotetop'>QUOTE(Tideland Prius @ Apr 3 2007, 12:25 AM) [snapback]416827[/snapback]</div> Yeah, but I suspect you'll be happily cruising along without AC in mid-July, won't you? I'll be trying to cruise without AC then, but it won't be happily!
