For some unremembered reason I flushed and filled my 1986 BMW K75C bike with Dexcool many years ago. I have drained and fresh filled about every 5 years. No issues to report. I did replace the plastic/aluminum radiator two years ago, but the bike was 26 years old with 140,000 miles...not a coolant issue I guess. Now time to drain and refill.....would another type coolant do me better? The Honda coolant I stock for the CR -V...BMW long life coolant?