Anyone have a favorite brand of a air filter for their HHR ?
also besides proper psi in your tires , and regular oil changes etc.
any good idea's for getting the best fuel mileage . with gas prices inching near $3 near me.

The best advice is to ease off on the gas pedal a bit. No hard accelerations, whenever possible run at 60 instead of 65, 65 instead of 70, etc.

Anyone have a favorite brand of a air filter for their HHR ?
also besides proper psi in your tires , and regular oil changes etc.
any good idea's for getting the best fuel mileage . with gas prices inching near $3 near me.
I agree with Doc brown. Easy does it on the gas pedal always works for better mileage. Seems gas here in So Cal is always $3.00 or more. I do use a K&N air filter and keep the tires inflated to what the sticker says on the door jamb. Have a 2.4 and it seems to run a bit better on premium.

i had a k&n on my previous car, but i had a short/ram air intake on that car.
this car im keeping with the faactory air box for now ..
is the $48 k&n factory shape filter worth the money , since its last the lifetime of the car and washable, instead of spending $12-20 eery 6-12 month's on a filter i guess it pays off in 2-3 years.
crazy that gas prices that much higher in cali here it fllex's from 2.63 - 2.83 back and forth..
and all 4 tires are usually around 34psi, right?

Regular air filters should last a few years and quite a few thousand miles unless you live in very dirty/dusty conditions.

ive been replacing mine every 12 month's, i did it last summer
and opened it up today and in the hose and the box there was leaves and so much dirt in there, so i cleaned it out well..

If you are gonna hang onto it for a while the K&N makes sense in savings..

I'm running one in my stock 2.4 box..

If you are gonna hang onto it for a while the K&N makes sense in savings..

I'm running one in my stock 2.4 box..

Also running 2.4 stock w/ K&N filter.

Just changed my air filter today for the first time, bought the car used with 19K miles last March........ 22K on it now. I seriously think I just pulled the original factory filter out of there...... what a mess it was. :eek:

I used a Purolator because I didn't have a preference and that's what the parts guy handed me.......

I've been getting great mileage, wonder how much it will go up now that it can breath. :cool:


EDIT: Just went for a test drive with the new purolator..... huge difference in performance.... :steering:

We used to have a 1/2 ton 4WD GMC Pickup with a 350. From day one, it was slow and it got around 16MPG. People I knew told me they put in a K&N and gained all sorts of mileage. I bought a K&N, it was slow and it got 16MPG. Then, these people told me to get a Flowmaster, and it would make a huge difference, so I did. The truck was now loud, slow, and got 16MPG. I was then told that the cat was the problem and if I removed that, it would make a world of difference. Now the truck was really loud, slow, and got 16MPG. What I found was that the people who made these claims never actually checked their mileage.

19 years later, I still have that K&N. It's on it's 3rd truck now. If you're looking for MPG, save your money. If you never want to buy another air filter for your HHR, buy a K&N.

The best advice is to ease off on the gas pedal a bit. No hard accelerations, whenever possible run at 60 instead of 65, 65 instead of 70, etc.


ugh now what fun is that hehe

I used a Fram air cleaner filter, Bosch Platinum Plus 2 spark plugs, Mobil 1 5-30 synthetic oil with a Fram CH9018 oil filter, fuel system cleaners in each tank of gas, 40 psi in my tires, and I put it in nuetral when I am going down hill, I get about 33 mpg. My car has 25,000 miles on it. Trust me, these changes needed to be made to improve the gas mileage and the performance.

I used a Fram air cleaner filter, Bosch Platinum Plus 2 spark plugs, Mobil 1 5-30 synthetic oil with a Fram CH9018 oil filter, fuel system cleaners in each tank of gas, 40 psi in my tires, and I put it in nuetral when I am going down hill, I get about 33 mpg. My car has 25,000 miles on it. Trust me, these changes needed to be made to improve the gas mileage and the performance.

Fram filters aren't exactly known for any quality these days. Well documented.

The Bosch multiple electrode plugs aren't the best either and are inferior to the newer Iridium plugs, such as the OEMs.

GM does NOT recommend fuel additives. The mandated additives today are fine.

40 PSI may lower rolling resistance slightly but expect a harsher ride and more wear in the center of the tread as a result.

Putting the car into neutral going downhill is useless, in fact will result in LOWER mileage. When in neutral, the ECM is still providing fuel to prevent a stall. These newer cars have a programmed "feature" called DFCO (Decelleration Fuel Cut Off) that will cut off all fuel during most coast down conditions. It is done for both fuel mileage and emissions.

:roll: :eek:

Putting the car into neutral going downhill is useless, in fact will result in LOWER mileage. When in neutral, the ECM is still providing fuel to prevent a stall. These newer cars have a programmed "feature" called DFCO (Decelleration Fuel Cut Off) that will cut off all fuel during most coast down conditions. It is done for both fuel mileage and emissions.

Then why does the mpg's go up on the DIC?

Then why does the mpg's go up on the DIC?

Some thoughts to ponder....

1. Put car into neutral: Gas is fed to prevent stall. (not much though)

2. Leave in gear: NO gas during DFCO, where NO gas is fed.

Now which do you think uses more?? :confused:

Some thoughts to ponder....

2. Leave in gear: NO gas during DFCO, where NO gas is fed.

Now which do you think uses more?? :confused:

But if no gas was fed, wouldn't it stall?:lol:

But if no gas was fed, wouldn't it stall?:lol:

Yes it would. :lol: However below a certain RPM or speed in gear, the fuel will resume to prevent a stall during coastdown. :cool: