Knocking at start up. For 10 sec

Hello, although it sounds like your attempts at maintenance are impeccable, realize also that there are many negative effects of driving so infrequently. Driving only a little more than 2,000 miles per year can yield unique maintenance concerns. Nonetheless, there is no way to know anything about your noise without a professional, trained ear hearing the noise to start with, and then appropriate troubleshooting from there. Noise can be originating from so many areas that it is difficult to know even hands on, let alone online here. Once you figure out where the noise is coming from, a repair path can be figured out, and then it can be determined if it was preventable or not.