问:石油泄漏在SUV,但无法找到来源

我的车已经约。58000英里,以下缺失的原油问题昨天才开始。当我有石油改变了,他们告诉我,我的SUV是四夸脱低油。它通常持有6夸脱,所以他们补充说美孚1合成油和填充它。昨天我不得不靠边,检查油位,因为检查引擎灯来吧。但是没有显示在试纸上。我是足够接近一个汽车店走和购买6夸脱的石油。就花了四夸脱之前任何试纸显示。我试图找出石油在哪里。没有油滴在地板上我的车库,没有烟当我驾驶车辆。 I even had a friend drive behind me to make sure. The coolant is a green color and the oil isn’t light brown or frothy. It is the color that it should be. I’m diligent in getting my oil changed every 6,000 miles using synthetic oil. I’ve done two oil changes in between the previous one and yesterday. No problems there. I removed a spark plug to see if it was covered in soot or oil, but it’s not. It looked just like it should. Can you give insight as to where the oil is going?