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Old 11-11-2018, 07:15 AM   #6
Josh (PA)
Hello.
 
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Join Date: Mar 2004
Carmudgeonly Ride: '09 X3, '11 328xiT, '11 135i C, '17 c2, '19 X5
Location: Downingtown, PA
Posts: 5,514
do they change from summer to winter gas formulas down your way? Might just be coincidental timing.
The difference between summer- and winter-blend gasoline involves the Reid Vapor Pressure (RVP) of the fuel. ... The US Environmental Protection Agency (EPA) says conventional summer-blend gasoline contains 1.7 percent more energy than winter-blend gas, which is one reason why gas mileage is slightly better in the summer.
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'19 X5
'17 991.2 C2 Cab
'11 135i Convertible
'11 328xiT
'09 X3
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