Hi Scotty,

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.

Picture: https://s3-us-west-2.amazonaws.com/maven-user-photos/34ce3b93-d565-4692-b036-21574f6e38de

Is this anything to be concerned about?

Thanks so much!
Doug

Comments
No. 1-3
ScottyKilmer
ScottyKilmer

in humid conditions many cars will do just that. BUT often a weak tank of fuel will contribute to that, SO I might change fuels and see if there is a difference

Believe231
Believe231

Yep, monitor the oil and coolant levels for a while, if they don't change, probably just condensate.

Mark Whinton
Mark Whinton

Something is confounding your evidence you're finding - if coolant level isn't dropping then it can't be coolant - it would be impossible - most likely water/condensate - I've never seen raw coolant make it to the end of the exhaust system - ever - plus 02 would set a code with that kind of volume

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