My Plus 8 has developed an annoying squeak which appears to be from the leaf springs. Various non-Morgan sources I have checked recommend WD40 or aerosol lithium grease. WD40 seems pretty thin and seems like it would wash off the first time I drive in the rain. Any one tried those or have another recommendation? At the risk of eliciting the "they all do that, live with it" response, any general suggestions for taming squeaks and rattles in a Morgan?

Many thanks for any help or suggestions.

-- John