Misfire "as told by a mechanic"
Stuttering or hesitation. My car suddenly had a
stutter after an oil change specially while going
uphill on cruise control. Sometimes check engine
light goes off and car runs smooth. Changed the
spark plugs and it was okay for a day then back to
the same problem. Drained out the oil and changed
with specific oil type "as on the lid" and again it ran
smoothly for a day then back to the same problem.
Need advice before going to the dealer and
spending money I don't have.