Is this your first winter in the TCH? This will be my second full winter and both my TCH and my wife's Prius MPG drops DRAMATICALLY in the winter. I typically go from 36-38 to 30-34, and my wife goes from 52-53mpg to 42-44mpg. Are you sure your tires are doing this and not the cold weather?
Quote:
Originally Posted by nathanso
At 19K miles my TCH had worn through its original equipment Michelin Energy MXV4 S8 tires. Since exact replacements were $185 at Costo we opted for the $130 Michelin Pilot Exalto A/S tires in the same size.
Of late, my wife has taken over my TCH, running it mostly on the highway on her new 100+ mile daily commute. The nav system computer was noting 35mpg average on the MXV4 S8 tires even with pressures in the low 30s (due to my neglect).
I had the new Pilot Exalto's nitrogen filled to 40psi all around. And now the car is averaging only 30mpg on the same commute. In cooler weather. Ouch.
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