Chevy Aveo: How to improve CITY MPG?

[Domman56]

Originally Posted by Thymeclock

If you read my posts you'll see that I already have all the grilles blocked.

my bad dude didn't really read the whole post

[Thymeclock]

This may be the reason why. It's the electronic control of the transaxle.

[JohnNeiferd]

The EPA did a study proving that on fuel injected vehicles a clogged air filter will not affect fuel economy, it will only affect horsepower. A K&N won't improve your fuel economy anyway, the DIY warm air intake would be a much better route. Some people prefer filters like Spectre and K&N because they are reusable. However, if you hold them up to the light there are some areas where you can see right through them. Small holes, but still much much larger than the holes you'd find in a standard paper filter. If you plan on keeping the car long term, I'd recommend going with a standard paper filter or an Amsoil Nanofiber Air Filter. They have been proven to filter much better than K&N type filters. This will prevent as much dirt from getting in the cylinders and reduce cylinder wear and help maintain good compression longer.

[Thymeclock]

Originally Posted by JohnNeiferd

The EPA did a study proving that on fuel injected vehicles a clogged air filter will not affect fuel economy, it will only affect horsepower... (etc.)

John,

If you read the entire thread, and particularly my last post, you might realize and understand that the poor city FE has nothing to do with the air filter or anything other than the control of the transmission, meaning the points at which it is programmed to shift. My car is 3 months old with less than 2000 miles on it. It never gets out of 3rd gear until it's over 45 mph.

Installing a different air filter won't help anything.

CLICK HERE

[Frank Lee]

cone filters....

[Phantom]

Only driving 8 miles will kill the MPG since the car will not use the some of the sensors till it has warmed up. Also the transmission has two tables one for cold and one for warm in the cold setting it will hold longer before shifting or locking the Torque Converter.

I'm not familiar with the cars ECM but look around for a tuning program like HPTuners (note they do not have support for your car currently but you could contact them). You would not even have to but the programmer as long as you find some one local that has it.

OR you could try finding someone with a TECH2 (dealer often or a great shop) and see if they can scan and lower the 4th shift and TC lock/unlock about 3 MPH.

Good luck.

[Roger Jolley]

Originally Posted by Phantom

Only driving 8 miles will kill the MPG<snip> Also the transmission has two tables one for cold and one for warm in the cold setting it will hold longer before shifting or locking the Torque Converter.<snip>
OR you could try finding someone with a TECH2 (dealer often or a great shop) and see if they can scan and lower the 4th shift and TC lock/unlock about 3 MPH.<snip>
Good luck.

Thanks. In my case, I drive mostly longer distances on the highway. I could possibly change the temp sensor used for the cold setting slightly. (Not a factor this time of year.) Thanks for the tip about the TECH2. ;-]

[S2k-Takara]

Didn't someone in another thread say that these Korean cars are gonna kick ass in MPG?

[Heihetech]

Dynamic Cylinder Deactivation(DCD) Could be a Good Soltion to This Thread.

I installed DCD Controller in my 4-cylinder 1.6L AT vehicle like Chevy Aveo,
and tested it in stop-and-go mode around the city block, yielding some 10%
to 13% fuel savings. DCD reduces the engine displacement as well as the
engine power when you don't need too much power during city-driving mode,
resulting a limited accelaration when you start from stop. Such kind of saving
is even larger than that of driving under steady speed, which is around 5% to
9%. So DCD could be best suitable for city-driving. Trying is believing. I have
made a 4-cylinder engineering sample called DCD-440 for you guys to try.

[A.J.]

I'm wondering if your Aveo has DCFO. If so, trying to use engine braking might help your mileage and save you on brake pads and discs.