I have city A/T 2009 with 128000 mileage, when i bought previous owner was using Mobil 20W50 Lubricant , i visited Honda workshop & they people change lubricant & filter with Honda 10W30 Now when i check the dip after 2500 KM running oil is short & reduce between the 2 wholes present at the tip. Can any body confirm what is the reason, Is this is due the change of grade, Engine looks ok when i start car in morning it is water throwing, Please advise what should i do in this case.