After changing the oil on my '79 300D, I observed the
old Hengst oil filter had undergone a transformation of shape!!

Normally the filter is cylindrical in shape.

This one's top half, the screen mesh half, had five flat sides.

Apparently the filter had undergone some type of extreme
vacuum like force which pulled in the sides to almost flat
sides. Five sides. (pentahedron?)


Any ideas on how this happened?
approx. 3500 miles on the filter.


Thanks!!

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD