My bird leaks in a few normal spots anyways, and its minor and predictable, like clock-work. I've learned to know exactly what size puddle she'll leave over 3-5-7 days.
If using synthetic will change that known standard, it would cause me to have to learn her pattern all over again!! :p
'68 428 HO M3 Monster, 4-on-the-floor! Need I say more?