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I know that MPG is suppose to decrease in cold weather but come on my avg went from 32 to 26. Its almost all Highway with commuting to school 5 days a week at around 75mph avg. This normal?

 
Rep Power: 811

i get 40mpg in the summer and 32 in the winter all highway miles. yeah its pretty normal. colder air means more fuel being used to get the correct a/f ratio and keep the ecu happy.

 
Rep Power: 234

try using super it burns slower therefore you get a more complete burn with that dense air in there. yea it costs a little more but i bet you go farther on the tank.

 
Rep Power: 811

you get a more complete burn using 87 in our engines.

 
Rep Power: 245

That's interesting. I've never experienced a 20% reduction in gas mileage from cold weather in a Honda driving in CT. When's the last time you did a tune-up?

 
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Only things I did to it over the summer was Filter,Plugs, and Fuel Filter.

 
Rep Power: 266

What about distributor cap? Rotor? Plug wires? My gas mileage went down too btw, but only to ~34 highway and I normally get 38 in warmer weather.

 
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Havn't touched those. Btw when the engine is cold it seems to be burning a lot of oil. Since it has been cold lately I normally give it some gas to about 3k when it first starts up and it just rolls white smoke out of the exaust or If I floor it before the engine is warm I can see a trail of white smoke down the road. Yet once the engine is warm it stops? It does this anytime the engine is not warm(even in the summer).

 
Rep Power: 266

What do you mean when it first starts up? Like literally? The engine automatically takes you to 2000rpm through the IAC valve, and you shouldn't give it any more gas beyond that. It takes 1 minute to pump oil to the top of the engine, and after that if you want to warm up the car just drive it.

 
Rep Power: 811

when i cold start the 92 accord, in cold weather, alot of times the idle will rise and then suddenly fall and shut down unless you hold the gas pedal for a while. im guessing the iac is clogged again.

 
Rep Power: 0

I realize that but still even at 3k for a few seconds I don't get why its burning oil only when its cold. Or anytime I put it too the floor.

 
Rep Power: 811

have you done a leakdown test? it could be worn valve guides but also the piston rings could be bad. compression test? are all cylinders making close to the same psi?

 
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It will be a few days before I could take it to have a compression test, if it makes a difference until its warm it also sounds like its knocking like mad.