Winter blend or the temperature impacting MPG? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 3 (permalink) Old 04-25-2011, 10:57 PM Thread Starter
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Winter blend or the temperature impacting MPG?

Been watching my mileage increase over the last 3 months from a low of about 15.80 (on the coldest week of the year) to 17.91 the last tank. According to my gas station, they still have winter blend until may. I don't let it run to warm up (heated garage) and use the block heater below 0 degrees. No changes to the truck so wonder if it's the blend or the temp?


2003 F350SD 7.3L CCSB
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post #2 of 3 (permalink) Old 04-26-2011, 12:04 AM
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Re: Winter blend or the temperature impacting MPG?

yes to both, this time of year is getting to be the best temps for mpg's in my opinion. I started going to the big truck stops and getting straight #2 because we are blended here until may 15th and I instantly picked up 1.5mpg's. I am currently around 19.36 mpg's on straight #2, shooting for 20mpg

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post #3 of 3 (permalink) Old 04-26-2011, 10:22 PM
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Re: Winter blend or the temperature impacting MPG?

Actually both negatively affect MPG, but the colder air temperature has the greater effect. Aero drag is proportional to air density and we all know cold air is denser than hot air.

Winter blend has about 10% lower heat content than straight No. 2.

Also, people drive differently in the winter.

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