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Re: [Phys-l] Hybrid mileage

If it's all about grred and profits, why wouldn't they keep the winter formulation year-round?

Bob at PC
Physics: Fair and Balanced

From: [] On Behalf Of WC Maddox [maddox@physics.Auburn.EDU]
Sent: Tuesday, January 05, 2010 4:11 PM
To: Forum for Physics Educators
Subject: Re: [Phys-l] Hybrid mileage

From: WC Maddox

From a website where other people are asking about temperature effect
on Prius Hybris gas mileage:
"Remember the oil companies put oxiginaters in in winter for easier
starting. Cuts down on power. They also don't care if you use more.
Witness their profits. Nor do the FEderal gov't - 18.6 cents per gallon
tax and states, anywhere from $.07 to $.30 per gallon tax."

On 1/5/2010 2:31 PM, wrote:
Am not sure if this is the cause but the gasoline manufacturers typically
have two different "mixtures" of gas summer and winter. They say that they
do this because the different conditions, primarily temperature related,
call for different gasoline characteristics for the motor to run most
efficiently. So they are being nice to do this because it helps the
customer._I can't help but wonder if one of the two mixes is cheaper to

Don Mathieson
Tulsa Community College

Forum for Physics Educators