Doing some 100+ mph pulls on the Yukon I got a couple of cylinder #1 misfires. Found some arc traces on #1 spark plug which was new 1,500 miles ago so I replaced it & all is good again. New parts going bad is so common & frustrating.
2/3 of my drive to work is a curvy hilly hwy that goes thru 2 small towns (25mph) but no stops (pic1) & remaing in towns with many stop lights which I hit 15 of the 17 red lights tonight (pic2). Still did pretty good on the gas mileage.
I have 1,500 miles on the new cam/lifter setup & also did a transmission fluid/filter and have been enjoying the extra power that I wasn't expecting. Since this is my daily I didn't want a lopy cam & the power curve with VVT is so much better. The improvement in mpg
was a pleasant surprise.
My best driving to work has been 27.7mpg (only hit 6 red lights) where before cam was 25.8mpg.