Hi all. Hope life is good to you. I have a great 08 RSTD which I love. Lately my mpg has really dropped. Backfire is common when downshifting. Took it to my guy, new plugs and knn filters, fuel system cleaning...... Got worse. I can smell fumes pretty strong when I sit still. My mpg went from 200 before reserve is needed. Now about 135. Any ideas I can pass on to my guy. I hate to go to a stealership here. Bunch of young kids working there, and $100.00 an hr.
Any ideas?
Thanks, Matt