Running rich, and getting poor?

[pennor]

I noticed the same thing with my Colorado PU for several winters. I imagine, but I have no summer experince to match it to yet, that the Camaro will do the same.

It seems to be a matter of the engine taking longer to warm up in the cold weather and that keeps the computer feeding a richer mixture for a longer period of time. It seems to be most noticable if most of your trips are only a few miles at a time and in stop and go driving.

[The Stig]

Originally Posted by DangerouSS

You also need to consider that it takes fluids longer to get to operating temp, which decreases your fuel economy. Usually fuel economy goes up by about 3mpg for me in the fall and winter, because I'm not using my AC.

Mythbusters proved that AC usage does not relate to mpg. They tested on a closed track, with cruise control, same car, 5 gallons each.

[TommyTSquared]

Originally Posted by stieger

Mythbusters proved that AC usage does not relate to mpg. They tested on a closed track, with cruise control, same car, 5 gallons each.

lol well that's true and it isn't. What they 'proved' was that it was more efficient to drive with the AC on instead of with your windows down. There are still a lot of assumptions as there are still a few elements that weren't controlled in that test.

Can driving with the AC on affect your mileage in a negative way? Yes. Does it always, no.

[04Ram2500Hemi]

Originally Posted by Lucky SOB

The A/F ratio is the same... you're just adding more air because it's colder (more dense)... so, your MAF and 02 sensors are also adding fuel. It's just the way things work.

Originally Posted by justa25thTA

Winter fuel blends?

I think both of these members hit the nail on the head. I know in the winter my fuel economy in my truck drops about 2mpg. It's just the way it goes when you live in an area that gets colder temperatures.

[SleepWarz]

winter fuel additives to prevent freezing and geling. Gives worse mpg's

[Xanthos]

Originally Posted by SleepWarz

winter fuel additives to prevent freezing and geling. Gives worse mpg's

Considering gasoline is still stable enough to ignite at temperatures of -97*F, I doubt that freezing or even gelling is even remotely an issue. Not saying they don't use additives in the winter that aren't in gas in the summer, but I doubt its to prevent freezing.
- X

[VR Baron]

Originally Posted by pennor

I noticed the same thing with my Colorado PU for several winters. I imagine, but I have no summer experince to match it to yet, that the Camaro will do the same.

It seems to be a matter of the engine taking longer to warm up in the cold weather and that keeps the computer feeding a richer mixture for a longer period of time. It seems to be most noticable if most of your trips are only a few miles at a time and in stop and go driving.

All true along with the gas blends. My trips were short also, 8 miles each way so that doesnt help either.

[multiSS]

If your not getting enough smiles per mile, maybe you need forced induction. Won't help the MPG though haha

[ffrcobra_65]

Originally Posted by pennor

ABSOLUTELY!!!!

$3.09/gal and climbing! And that's for 89 octane for my V6. I piity you guys with SS's. At last look that gas was $3.37 and also climbing.

Why? because you are assuming we can't afford gas for our SS like you can't seem to afford gas for your V6? No biggie.