How often should I change the oil in a tuned Japanese performance car?

Tuned engines benefit from frequent oil changes. For street-driven modified cars: every 3,000-5,000 miles. For track-driven cars: every 2,000-3,000 miles. For drag-raced cars: after every competition. Use OEM-recommended grade or better synthetic oil. Rotary engines require even more frequent changes (every 3,000 miles maximum).