I have a 2012 Mazda 5 with 41,000 miles on it, bought new and oil changed twice a year with the top quality oil (Mobil 1) and filters (Fram Ultra). I did an oil change on May 8th when it had 39,670 miles. I have been noticing a small puddle accumulating below the tail pipe (see picture). At first I thought it was just water condensation in the engine being forced out in the combustion process because the liquid looked clear and not dark. However, when I touched the liquid, it felt more slippery than water would feel. I put a paper towel on it and towel didn't get soaked like water but it looked more like oil. However the color appeared to have a greenish tint. The car uses FL 22 coolant which is green. The car's oil level has consistently showed full so I don't believe any oil is being leaked or burned and the exhaust gas is clear with no smells. The car otherwise works just as well as when it was new.
Is this anything to be concerned about?
Thanks so much!