I notice that my 1989 300E gets warm very quickly. In about a half mile the temp gauge is already passed 40 but it does stabilize around
80 or alittle above that. Is that normal? Can I get a thermastat that opens at a lower temp so it runs cooler. I?m not familiar with import cars but I know that heat kills an engine. Would running the
300E cooler be wise? The coolant is blue, can I used green antifreeze with it? Whats the difference between blue and green antifreeze?