At what speeds do you drive?Originally Posted by Bigs
I'll bet that if a substantial amount of your driving is done at speeds under 45 MPH the A/T is not in high gear and torque converter lockup: which means your fuel economy will suffer.
In other words, an Aveo with A/T only gets great fuel economy at speeds over 45.
in my commute, there is a 100km/h-limited expressway. parallel to that is a 4-lane 80km/h highway. i take my opportunity to poke around on the 80km/h highway. here i can do some pulse-and-glide and some coasting. i have done my tests and driving at 100km/h hurts my FE. too much wind resistance. when i do need to use the expressway, i do use drive-with-load, but to some extent. too slow and i could get rear-ended, too fast and im wasting gas. in the city, i time the lights and coast as much as possible.
Merely driving slower is not necessarily going to give you a gain in fuel economy.in my commute, there is a 100km/h-limited expressway. parallel to that is a 4-lane 80km/h highway. i take my opportunity to poke around on the 80km/h highway. here i can do some pulse-and-glide and some coasting. i have done my tests and driving at 100km/h hurts my FE. too much wind resistance. when i do need to use the expressway, i do use drive-with-load, but to some extent. too slow and i could get rear-ended, too fast and im wasting gas. in the city, i time the lights and coast as much as possible.
80 kmh = approximately 49 MPH. If your speed falls below 45 MPH at any time during your route your A/T will probably downshift (or fall out of torque lockup mode) automatically, resulting in a drop in fuel economy. What I am describing appears to be the result of the way Chevy rigged this transmission. Try keeping your speed up over 50 and see whether there is any improvement.
Lately to test my FE, I have been going 100KM/H and under... But I have caught my dealer skipping on some important stuff... Which could be the cause of this.
My tire pressure was at 21... I asked when I brought the car in what they did? She said they do a point inspections, oil change, tire pressure check etc... Well, next time, I will have to see if they even changed the oil...
I since added air in my tires to the recommended manufacturer psi and will see how that goes. That was a 12psi difference (by memory, I think it should be at 33) and that's freakin HUGE....
2008 Aveo LS Sedan Manual - Flame Red
Detailer at heart!
yeah. lately ive been poking around a wee bit too slow. my last fuel score was about 6.9l/100km or 33.9 mpg. i should keep it above 50mph.
i took my car into the dealership once and they forgot to check my tire pressure. sometimes i don't get what i pay for. anyway, i always keep a tire gauge in my glove compartment handy and i check the tires about once or twice a month. the recommended pressure is 30psi, but i usually keep them at 35.
Heck, I just air my tires up to 40psi. The ride is a little rough and bumpy but I haven't gotten less than 35 MPG.
I'm a little disappointed though, because I have a manual transmission and no A/C (SV model). I use all the hypermiling techniques and in the first 15,000 miles that I've had the car, I'd achieved 37-39 MPG regularly. But now I have 27,000 miles on it and no matter what I cannot do more than 35MPG, even when cruising at 55mph for long distances.
But it's still pretty good MPG, so I'm not complaining.
since you've got a manual, you can probably shift into 5th at around 40mph. i've heard of people chugging around in 5th down to 35, but you'd need a level grade for that.
If you inflate tires to more than 35 PSI you might find the car handles oddly.since you've got a manual, you can probably shift into 5th at around 40mph. i've heard of people chugging around in 5th down to 35, but you'd need a level grade for that.
If you lug the engine in 5th gear at 35 MPH it may be somewhat uncomfortable, and lugging the engine also contributes to engine sludge.
Umm wrong. Sludge happens at high temperature, not at high load. I happily shift into 5th at 35mph, no lugging. Mind you, the streets I take are pretty flat. I can keep up with traffic no problem. Traffic on the main streets I take rolls along at 40-45mph (in a 30 zone)If you inflate tires to more than 35 PSI you might find the car handles oddly.since you've got a manual, you can probably shift into 5th at around 40mph. i've heard of people chugging around in 5th down to 35, but you'd need a level grade for that.
If you lug the engine in 5th gear at 35 MPH it may be somewhat uncomfortable, and lugging the engine also contributes to engine sludge.
I leased Pontiac Wave from September 2006 to August 2011.
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