<<Bottom line question, do I buy
BMW sauce or save money and buy Zerex?>>
Various psoples say different things, but even if the factory stuff is twice as
expensive, how does that compare with the cost of corrosion problems down the
raod? If you buy it from the dealer or a reputable shop, then you have proof
that you complied with factory rec. if there are problems later. When in doubt,
go OEM.