I read the article on Antifreeze in the Mercedes publication 'Star'. I use the havoline.

I have been around this block a few times. On an airplane powerplant by lycoming (the 360), an alternator belt used on that motor is the same $41 john deere belt. The only difference in the two is that lycoming takes the john deere belt, blesses it with various incantations, stamps a different number on it (FAA) and sells it for 3 times what you can get it down at the tractor place.

carry on.........