I have a craftsman 5.0 HP / 24 snow blower. Model # 247886640 Serial # 1K271I30116. The auger seems a little noisy when I was blowing snow this winter. I was changing the oil and noticed that the auger has a small plastic plug in the middle of the auger. I removed it and found a hole and was wondering what lubricaation I should use to lubricate the auger? Greese or oil. My E-mail address is RogerH10@myfairpoint.net. Thanks in advance for any info on this...