Quote:
Originally Posted by shertex
In the W211, interval is 15 years or 143,000 miles. But that's a long time...so I'd like to test it.
I am unable to find any test strips specifically for Zerex...Valvoline certainly doesn't sell any. But there are some that work with (H)OAT so that's probably my best bet.
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The 15 year interval is only with the original expansion tank - it has a silica packet in it. Hoping no one ever added the wrong stuff in the system (like all model all makes) it will work, if the wrong type was added, the silica packet becomes useless in a short while.