2008 Ranger FX4 4.0L V6 9.7:1 Comp. Ratio. SOHC. #2 intake valve leaking on leak down test. Rings and exhaust valve are good. #2 still has 108 PSI (for reference, #1 has 160 PSI) and gas mileage has dropped. Still drives and starts good. Current mileage 270,000 km. Mobile synthetic oil used since new.