I recenty purchased some 5w-30 Yardman/MTD (Olympic Oil Co.) APi SJ winter oil, and before i put some into a sample bottle to do a qualitative "freezer oil flow" test, I did the bottle "sniff" and the oil had no scent other than the mildest, slightest petrol odour. Also the colour was almost clear. I haver never bought an oil that had this light a scent or colour. Did they forget something?