So my '12 Chevy cruze 1.8L had a brief (within 20 miles it happened 3-4 times) time frame where as I was cruising in 6th gear the engine felt like it was hesitating and felt "bumpy". Now granted I have almost 5K miles on some syn-blend oil, but I highly doubt that could be reason for this. Anyone have any ideas? I plan on trading this in soon so I need to fix anything a.s.a.p.