Re: Zerex G-05, Pre-MIx and G48, all same or what?
G05 (sold in stores) and G48 are both hoat coolants, but the G05 is fully-formulated, or precharged with additives (usually nitrites) for diesel/HD engines. The BMW coolant does not contain nitrites or any HD additives. It says on the BMW bottle that nitrites (and some other things) result in deposit formation. I know that you will have big problems if you attempt to operate a diesel engine without the HD additives. I doubt though, that using the HD coolant in gasoline engines will hurt anything (G05 is used in Daimler Chrysler cars). My opinion is that it really doesn't matter what type of coolant you use, as long as you only use one type, keep it topped up, and replace it when recommended.