I have been using the following: Motorcraft 5w-20 and a ST3600 or 3614 or the Motorcraft equivilants depending on what is available. Vehicle is a 2009 Jeep Wrangler Unlimited w/3.8 V6. Mileage is currently 73000. I have had two UOA with no anomalies (1st around 6k and the other around 60k). However around the 60k mark, it started using a qt of oil every 3k miles. Noticed the low oil indicating the consumption the day I changed and collected the second sample. Subsequent monitoring indicates that is burning/using the oil around 3k. No smoke or leaks detected/observed. Oil change intervale is 6k per the manual. Typical trek to work is about 48 miles one way 5x a week. I usually get it a WM but it is getting to wear it is hard to find in stock. I then try local auto parts stores with the same issue. Seems to be a very popular oil which speaks for it's quality/popularity. Question I have, is there a good substitute oil for Moto SemiSyn 5w-20 for my application? Just wondering if there is a substitue I can use if I can't get the Motorcraft oil that is reasonably close in mix that I can use that will not hopefully increase the consumption.