[Jeff in Kentucky]

Some say the best regular coolant is Havoline Extended Life and half distilled water. The Evans NPG+ is even better, because you can run it with a depressurized radiator cap so your hoses last longer and this coolant lasts a lot longer- some have used it for 300,000 miles with no problems. Here is an article (note the links in it no longer work):

http://will.mylanders.com/mc/notes/read.pl?file=64

[Jeff in Kentucky]

Here is a different link for the Evans NPG+ coolant- amazingly, the above link expired on the same day I posted it:

http://www.cbr600f4.com/secondary_pages/evans.html

[Jeff in Kentucky]

This one is for small planes that use a Rotax engine. Note that they do not depressurize the radiator cap, in case the plane flies upside down or on its side:

http://www.sportpilot.org/magazine/feature/2005%20-%2001%20January%20-%20Power%20On%20-%20Keeping%20Cool.pdf

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