Holy crap, I never thought I would see the day. I was down at the local Walmart, and noticed my GC is sitting at the same price as always, $6.66 cdn, looked over and saw all the Mobil 1 supersyn products were $6.63, they used to sit around the $7.66 mark, also noticed the 4.4L jugs of Mobil 1 were a dollar or 2 cheaper then the 4L jugs of Syntec (I could swear $24 and change for the 4.4L jug, compared to $26 and change for the Syntec 4L jug). If the price stays this way, I may give Mobil 1 a try, once my stockpile of GC runs out. Is the Mobil 1 5W30 supersyn relativley good? or have people been experiencing problems with piston slap etc. and that is why the price has fallen?