It might be short for pint.
Patrol Torpedo
The oil capacity for a 09 PT Cruiser is five quarts.
Patrol Torpedo
Pt stands for Pint, as in a pint of water
Patrol Torpedo
Engine oil specifications (M16 Engine) Oil pan capacity: About 4.0 liters (8.4 US pt. / 7.0 lmp pt.) Oil filter capacity: About 0.2 liters (0.4 US pt. / 0.3 lmp pt.) Others: About 0.3 liters (0.6 US pt. / 0.5 lmp pt.) Total: About 4.5 liters (9.5 US pt. / 7.9 lmp pt.) Engine oil specifications (J20 Engine) Oil pan capacity: About 5.0 liters (10.5 US pt. / 8.8 lmp pt.) Oil filter capacity : About 0.2 liters (0.4 US pt. / 0.3 lmp pt.) Others: About 0.3 liters (0.6 US pt. / 0.5 lmp pt.) Total: About 5.5 liters (11.6 US pt. / 9.6 lmp pt.)
PT - Part Time PW - Per Week
points
15 gallons
7.4 quarts
2 qt = pt