This is probably well documented but the dirt build-up is ridiculous. After a few laps my car looks like it's covered in tar but the rest of the field is still clean. At Interlagos in Stock Car it looked like somebody sprayed stripes over my car, then I went onto the grass and my car was miraculously cleaned. It needs fixing or just get rid of it altogether. These screenshots were taken a few seconds apart on Lap 7. Checkout the dirty stripes and front grille! Ignore my race position, I was trying out a few things, not racing