I run 80wt with full rebound on all surfaces, asphalt/carpet, and it calms my Car down alot... No twitchiness, no darting, no Quick traction roll with low roll centers and blue front springs/ silver rear springs.... I run 80wt in my mini m03 also with great results.... Lighter oil make the Car react too fast. I would rather have a slower reacting Car to gain some consistency, but that's me....