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  #25  
Old 11-09-2012, 07:09 AM
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Re: Gas mileage decrease when....

Quote: "Most vehicles get less mpg's in the colder months, even my motorcycles."

I do not know where you found this myth, but some factors may contribute to how you came up with this hypothesis. I'll come back to this later.

I didn't come up with a myth, just years of driving in a part of the country that has 4 distinct seasons plus I have kept up with gas mileage on a spreadsheet for the last 15 years. Some of my vehicles do better than others but all drop 5 to 20 percent. My tacoma was the worst, 22 mpg in summer and 18 in winter driving the same routes. My chevy truck usually just loses 2 mpg, my suzuki motorcycle loses 5 and my victory so far has lost 5 mpg's since colder weather and winter blend of gas. The cherokee seems to be doing alright, avg mpg was 23.7 but has dropped to around 22.2 on the last two fill ups.
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Old 11-09-2012, 10:52 AM
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Re: Gas mileage decrease when....

TNjeep,

I am only quoting that which have generally been accepted as a truth. Read the part on the CAI: Air Intakes Research Guide | RealTruck.Com

Here is another article that describes my argument: What Causes Poor Gas Mileage in Cold Weather? | eHow.com

And yet another: Does Cool Air Intake Impact Gas Mileage? | eHow.com

And another: http://ezinearticles.com/?Do-Cold-Ai...PG?&id=1312343

I could keep going, but the reality is that I am not an engineer and there are arguments on both sides of this topic. Hopefully, some of the resources I have contacted are willing to offer a definitive answer. As I have also mentioned, there are numerous other factors that affect the efficiency of your vehicle year round, which cloud the accuracy and reliability of the physical events that takes place inside the actual engine when combusting gasoline with either warmer or colder air. Let's see what other sources say about this and hopefully we can all learn something new.
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