Originally Posted by babymog

There is a lot more to anti-freeze than color, or pH, nitrates and molybdates are important, OAT is a no-no in M-B land (such as the Peak Global Lifetime et al):
https://mbwholesaleparts.com/StarTuned/pdfs/AntiFreeDec04.pdf

It takes time and equipment to detect accelerated aging/problems in most cases, you don't know what damage you might be doing.

Prevention is almost always cheaper than repairs.