To desination 711 miles one way
91 octane 10% ethanol 28.5 mpg 73 mph temps around 0F
93 octane and no ethanol 30mpg 75-85mph (yeah I was following a Porsche suv :p letting him lead about 1.5 miles up (on empty roads) temps around 2F
return trip:
tank loaded with 1 can of seafoam automatic transmission fluid additive 1/2 can at top off before leaving and remainder at first refueling (I stop every 200 or so in the winter time)+93 octane 10% ethanol crappy ice covered roads average of 50mph first 200 miles and then 75mph for the rest of the tank 28.6 temps around -4F
remainder on clear roads temps around -2F 27.6 speed 75 mph..
car is 2002 CL type S with 133K on it with decent tires
91 octane 10% ethanol 28.5 mpg 73 mph temps around 0F
93 octane and no ethanol 30mpg 75-85mph (yeah I was following a Porsche suv :p letting him lead about 1.5 miles up (on empty roads) temps around 2F
return trip:
tank loaded with 1 can of seafoam automatic transmission fluid additive 1/2 can at top off before leaving and remainder at first refueling (I stop every 200 or so in the winter time)+93 octane 10% ethanol crappy ice covered roads average of 50mph first 200 miles and then 75mph for the rest of the tank 28.6 temps around -4F
remainder on clear roads temps around -2F 27.6 speed 75 mph..
car is 2002 CL type S with 133K on it with decent tires