Are Portable Jump Starters Worth It, The Most Fuel-Efficient Speed to Drive, Timing Chains vs. Timing Belts

Talking Cars (MP3) by Consumer Reports

This week, we go through the mailbag and answer audience questions, including: Is driving 55 mph really more fuel-efficient—even in a 10-speed like the Acura TLX? We break down the science behind highway MPG, explain how...View more