On Sat, 30 Dec 2017 21:04:50 -0500, "Mr. Luddite"
wrote:


That is true, at least for some of the exhaust components like the
muffler. I had a crappy, 1980 T-Bird years ago that the muffler rusted
out prematurely because I only drove it about 3 miles to my office and
the same back every day. Never got hot enough to evaporate the moisture
that collected in it due to condensation. It failed so soon that Ford
hadn't started supplying OEM replacements yet and they had to jury-rig a
replacement on it. Car looked like this one:

https://cdn04.carsforsale.com/3/279685/11061594/899781880.jpg

Yup, one of the major products of gasoline combustion is water vapor
and if the exhaust system is not hot enough, it becomes a still.