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Aircon/heater costs about 2mpg

475 views 1 reply 2 participants last post by  T-Cut 
#1 ·
Had a Rover/ZT diesel auto for just over 2 years and I usually get between 38mpg winter to 40mpg summer BUT I have noticed that it throws the odd 41mpg in and its in April and September(when I don't have the heater or aircon on). I have now just run it around for another tank full with the heater/aircon off and its still doing 41mpg.
 
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