Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,123
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
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The smaller/weaker the engine the more the MPG loss will be when the bikes are on top. So a small high efficient car will see more loss then a big guzzlier would. The Saabs I had (turbo 93s) would loose 2-4mpg (dependent on whether only the tandem was on top or it and two singles). My current VW 2.5L Golf looses about 4-8mpg in the same situations. Andy.