I purchased my big whale last year, I love the car. I've never owned a Dodge, from what I hear they have a hemi tick? When I drive my RT especially at low RPM's I hear a ticking noise, it's only at low RPMS should I have it checked it out or is that normal? I also had another question I changed my oil at 1900 the first time the car has 5000 miles now, should I change it now? or wait till 6k?