I have a 2013 RT-S that seems to use an excessive amount of oil. I have searched the forum and it appears the 998 has an oil consumption habit, but then I saw people were adding half a qt between oil changes. I'm adding half a qt every few hundred miles. One post said consumption is higher if you have the stock crankcase ventilation system. What is the modified crankcase ventilation system? I'm hoping to find a solution to the consumption issue before having to sink a ton of money at a dealer or carry a case of oil with me when I go on a long trip. And because I will be asked. I check the oil after riding so the oil temp is up and within the 2 minute mark. I have no drip marks on my garage floor under the machine. Thanks in advance!