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NeilBlanchard · 05-06-2009, 01:14 PM

Hi,

I don't think that is the reason for worse mileage in the cold:

Longer warm up time, so longer on rich mixture
Cold air has more drag -- ~6.8% more drag at 30F than at 60F
Bearings etc. have more friction due to cold lubricants

05-06-2009, 01:14 PM	#45 (permalink)
NeilBlanchard Master EcoModder Join Date: May 2008 Location: Maynard, MA Eaarth Posts: 3,743 Mica Blue - '05 xA RS 2.0 Team Toyota 90 day: 45.16 mpg (US) Josepha - '08 xD 90 day: 30.76 mpg (US) Thanks: 450 Thanked 414 Times in 257 Posts	Hi, I don't think that is the reason for worse mileage in the cold: Longer warm up time, so longer on rich mixture Cold air has more drag -- ~6.8% more drag at 30F than at 60F Bearings etc. have more friction due to cold lubricants __________________ Sincerely, Neil http://neilblanchard.blogspot.com/