Chevrolet Corvette Stingray C7 Forum - View Single Post - Time to raise the speed limit, how does 150 MPH sound?

TOMS1SS · 04-12-2011, 08:15 AM

We have several interstates I-17, I-10, 1-8 and I-40 here in Arizona that have large sections of 75 MPH. I drive about 40,000 miles a year and the I-17 is the only place where I hit 75 MPH on my commute heading from Phoenix to Sedona. This is the only place where my fuel economy in both my Camaro and Fiesta goes down, why you ask? In both cars the 6th gear is designed to run at its lowest RPM between 60 to 65 MPH and so is every other car. Until automakers change this gearing we'll actually be burning more gas at a national speed limti of say 85 MPH.

04-12-2011, 08:15 AM	#5
TOMS1SS Drives: NA Join Date: Aug 2010 Location: NA Posts: 12,126 View My Garage	We have several interstates I-17, I-10, 1-8 and I-40 here in Arizona that have large sections of 75 MPH. I drive about 40,000 miles a year and the I-17 is the only place where I hit 75 MPH on my commute heading from Phoenix to Sedona. This is the only place where my fuel economy in both my Camaro and Fiesta goes down, why you ask? In both cars the 6th gear is designed to run at its lowest RPM between 60 to 65 MPH and so is every other car. Until automakers change this gearing we'll actually be burning more gas at a national speed limti of say 85 MPH. __________________ El funcionario señor de los desiertos de Mojave y Sonora.