1950 Super in Buick - Introduce Yourself Posted yesterday at 09:16 PM Beautiful car! Dynaflows are well-known for being leaky. I've been finding it very hard over the last 15 years to tear mine apart for a few drips on the driveway whenever I park it. Every year, I say "This winter, it's coming out!" Every year when winter arrives I say "Eh." Maybe one of these days.