I'm installing some 3" PVC drain pipe to redirect a downspout away from
the house. The hope is to reduce the moisture under my basement, where
my lathe & mill are (metalworking content!).

The pipe runs along the foundation, and goes directly under the filler
connection for our heating oil tank. The mulch around the filler is
stained, so I have to assume they will occasionally spill some oil on the
pipe. Is this likely to cause long term damage to the pipe? If so, I
can rig some sort of sleeve to protect the pipe in that area. I was
originally thinking of polyethylene sheet, but that may degrade over time
due to UV, so I'll probably have to come up with something a bit more
substantial.

Comments, ideas?

Thanks!

Doug White