acdii Report post Posted January 14, 2013 What is everyone getting on Interstate driving 65 MPH using EcoCruise? post miles driven and temps. So far I am seeing fewer than 38 MPG under ideal conditions, 36 in the cold with a tail wind, and under 30 with a head wind going no faster than 65, and not exceeding 3K during acceleration to speed. This past week I thought, maybe, just maybe it was bad plugs, but this is the first I took it on the interstate since the plugs were replaced and it has made no difference on the highway. Quote Share this post Link to post Share on other sites
lolder Report post Posted January 14, 2013 The odds of four new plugs being bad is miniscule. It wasn't the plugs. It's not fixed. Sorry ! Quote Share this post Link to post Share on other sites