Here in ct my 96 civic dx auto got 25 mpg when it was cold out which I thought was terrible. Now its like 50 degrees out and this last tank I got 33.5 mpg. I know mpg is better in the warmer weather but dosent that sound like alot? Its not even all that warm out yet! I hear its usualy about a 10% difference but thats way more.

I was wondering what everyone elses mpg differences are cold vs warm weather?

 

how did you calculate your MPG?
maybe it was a little bit off?
did you do the same type of driving?

 

ok,the car is fine. i drive fine. plugs,wires,ect ect blah blah are fine. i know how to calculate mpg. so........the question is.........I was wondering what everyone elses mpg differences are cold vs warm weather?
thanks

 

If you had the correct viscosity of oil in your transmission and engine, and the correct mixture of coolant in your cooling system, once the car got to normal operating temperature wouldn't cold weather help with fuel efficiency? Isn't that what all the hype behind "cold air intakes" is about? Furthermore, wouldn't the cooling system use less energy cooling the engine off thus not diverting as much chemical/mechanical energy into electricity for the fan(s)?

 

I have a '98 Civic DX that is stock except for a AEM SRI and a Flowmaster axle-back (muffler basically). Combined city/highway this winter I've been getting between 30-33MPG (with four studded snow tires too). Back in September, I was getting between 35-40MPG. I beat the you-know-what out of it when I drive and I live in Maine.

 

"Combined city/highway this winter I've been getting between 30-33MPG (with four studded snow tires too). Back in September, I was getting between 35-40MPG. I beat the you-know-what out of it when I drive and I live in Maine."

You switch out the tires I take it when the snow's gone/now? What a garbage winter NE had. Where abouts in ME are you at?

 

Thanks. Your the first person out of about ten on all these civic boards who actualy answered the question. So I guess the mpg difference is pretty normal for my car

 

Do you do all city driving or all highway driving or a mix?

It is normal for cold weather to reduce gas mileage as it takes much more time for the engine to fully warm up. Until the engine is fully warmed up, the engine runs a rich fuel mix predetermined by the ECU (open loop).

 

Yes, in fact I'm going to be getting four brand new summer tires in a couple of weeks (General Altimax HP). Last September when I was getting 35-40MPG, I was running on two rear tires that were cheap and right down to the wear bars. I live in the Portland area and I commute north to Farmington every week.

 

i get about 33-37 mpg all year long regardless of weather. on the other hand, my drives down to school is long, 30+ minutes and i deliver food at a restaurant as my job, so i rarely have the car running at a cold start up so weather shouldn't affect me as much...