Oval
If you only corner left on an oval then you preload the inside tires by moving weight left in the car. This results is more even tire loading after weight has transferred to the right in a corner. This gives you the best cornering power to each axle. This left weight bias works very similar to our rear weight bias on a touring car. It is an attempt to even out the tire loading while the car is cornering. An oval car will also have an optimum fore aft weight bias that probably has more weight in the back as well. Moving weight in the oval car is a major tuning tool.