Wondering why my oil level is the same, whether I check it cold or hot. Shouldn't it be lower if cold??? And also wondering why I was about half quart low after a 500 mile ride this past weekend. The bike only has 7500 miles on it, so it shouldn't be using any. Cleaned the air filter and there was a little oil in there, but not a half quarts worth. Should I be concerned, or worrying about nothing. Thanks.