Piston Ring, Engine

Piston ring end gap
Top 0.15-0.30 mm (0.006-0.012 inch)
Intermediate 0.25-0.50 mm (0.0098-0.0197 inch)
Oil control 0.15-0.65 mm (0.0059-0.0256 inch)
Ring width
Top and intermediate 1.50-1.48 mm (0.0590-0.0582 inch)
Ring-to-groove clearance
Top 0.020-0.060 mm (0.0008-0.0020 inch)
Intermediate 0.020-0.060 mm (0.0008-0.0020 inch)