Reviewed By Jerome O (Frederick, MD) Reviewed for a 2010 Chevy Silverado —6/24/2017 7:25 AM
Bought this for a new engine after my original GM 5.3 blew because of the AFM system. The devise improved acceleration. I believe it has somewhat decreased MPG but not much. Would rather use a little more gas than have sub par performance and avoid future engine failures because of cylinders shutting down and resulting poor oil circulation.