JSC said:Only my "opinion" but, I got to talk with a guy that is a supplier of anti-freeze and seemed to be a an antifreeze geek, he knew of the stuff we use in the bikes and recommended something different. Guy was way too technical for me but, after seeing the thread of Smoothrods and seeing what the water pumps and gaskets look like- I took the chance and changed mine.
Only the newer technology Prestone 5/150 Extended Life Pre-Mix. It's silicate, phosphate, and borate-free and touted as being good for aluminum engines. It's also safe to mix with ANY coolant, according to Prestone. The regular Prestone Heavy-Duty Concentrate coolant thats been around for "decades" does contain silicates and should not be used.hd-v-rodder said:Anything wrong with Prestone? Been using it for decades in cagers.