embarrassingly bad mileage... REALLY - Toyota Yaris Forums

ozmdd · 04-19-2009, 11:30 PM

Tire pressure and TRULY mellow acceleration are the keys to high MPG. If you've upgraded to bigger/wider tires/rims, you'll also see a slight loss of MPG due to more rolling resistance, but you get increased grip.
I drive "normally", without much attention paid to coasting, and try not to do to much jack-rabbit stuff in traffic, but I occasionally do have to double downshift and pass the ultra-morons on their cell phones. Also, I run some fairly stick tires 215/40/17 (Azenis 615's) on 17x7 Draglites, but I keep the pressure fairly high (35-ish) and the stock TPMS is happy. Most of my driving is city/freeway. I generally average 34 in town. I've gotten 41 on a tank on the highway on this same setup, but it was in the winter (no A/C), 65 MPH on cruise for literally 95% of the tank on west Texas highways (zero traffic, one restroom stop). On the outbound leg of that same trip, I was on the Interstate where the speed limit is 70, 75 and 80 mph, and I only averaged 36.5 with a headwind. The Yaris really suffers above 65-70 MPH, due to the simple physics of drag and a smallish HP rating. I suspect that a 55 MPH long-distance road trip could go well above 40 MPG, but I'd rather spend a few bucks more and get where I'm going in this lifetime.
Hypermiling is a fun game, and I did it quite a bit when I initially bought the Yaris (novelty, $4/gal gas and new car break-in), but I personally think I'm doing my share for the environment by simply driving a Yaris. I like my driving better now that I don't overthink it. Hypermiling is a lot like dieting.

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04-19-2009, 11:30 PM	#36
ozmdd Reluctantly Crouched... Drives: 2008 Yaris HB M/T Join Date: Oct 2008 Location: DFW, TX Posts: 867	Tire pressure and TRULY mellow acceleration are the keys to high MPG. If you've upgraded to bigger/wider tires/rims, you'll also see a slight loss of MPG due to more rolling resistance, but you get increased grip. I drive "normally", without much attention paid to coasting, and try not to do to much jack-rabbit stuff in traffic, but I occasionally do have to double downshift and pass the ultra-morons on their cell phones. Also, I run some fairly stick tires 215/40/17 (Azenis 615's) on 17x7 Draglites, but I keep the pressure fairly high (35-ish) and the stock TPMS is happy. Most of my driving is city/freeway. I generally average 34 in town. I've gotten 41 on a tank on the highway on this same setup, but it was in the winter (no A/C), 65 MPH on cruise for literally 95% of the tank on west Texas highways (zero traffic, one restroom stop). On the outbound leg of that same trip, I was on the Interstate where the speed limit is 70, 75 and 80 mph, and I only averaged 36.5 with a headwind. The Yaris really suffers above 65-70 MPH, due to the simple physics of drag and a smallish HP rating. I suspect that a 55 MPH long-distance road trip could go well above 40 MPG, but I'd rather spend a few bucks more and get where I'm going in this lifetime. Hypermiling is a fun game, and I did it quite a bit when I initially bought the Yaris (novelty, $4/gal gas and new car break-in), but I personally think I'm doing my share for the environment by simply driving a Yaris. I like my driving better now that I don't overthink it. Hypermiling is a lot like dieting.