Quote:
Originally Posted by cormike
The difference begins to show up when the temp drop into the mid 30's and the info.center confirms an avg mpg of 11. I believe the engine is not getting enough air through the intake, but the engine runs well and does not smell like it running rich. I've also tried 93 octain, no improvement so far. What could I be missing here, besides the air filter compartment,is anyone familiar with the lower part of the air box. thanks.
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Usually the cause of poor gas mileage in the winter is when the car is left idling for long periods of time to keep the inside warm. Burning gas without wheels turning = poor mpg. Winter air is (duh) cold and more dense which most engines like. I agree with Rob, check your actual mpg. Winter running does decrease mpg simply because the running gear needs more time to warm up, and stays "stiffer" for longer amount of time. Using 93 octane just means you're paying more per gallon. Unless your car requires super premium I wouldn't use it.
One more thing just hit me. Don't know how many miles on this car, but think about having your 02 sensors checked. If they're sending wrong info to the cars computer, it can cause problems with fuel economy too. There should be 2 on your car: one in the exhaust manifold, and one by cat. BTW 02 sensors are cheaper to buy on the web than going to a dealer if that's the problem.
Definitely check and replace your air filter if required. Don't forget to changeout the PCV valve too. Lots of time this gets overlooked.