rust proof/oil spray

[gitchies]

Do you guys spray the undercarriage yearly on your x5? Just wondering if i should...i usually do on all my cars, but many have told me its a waste of money on german cars(vw, audi, bmw)
any thoughts?
thanks

[JCL]

No, waste of money.

Aftermarket undercoatings, and home-applied sprays, stopped being beneficial when manufacturers started using galvanized panels, and applying factory undercoat, many years ago.

[sethro]

I just went at it with some Tremclad matte black rust paint and 6 years later not a spot of rust anywhere.

[gitchies]

i was thinking of spraying it, just to keep to measure....moreless piece of mind, something is better then nothing.....dam canadian roads!!!

[JCL]

In many cases it is worse than nothing, not better. Spraying any type of sealer over any existing corrosion speeds up the corrosion. It holds the moisture in.