- Engine oil viscosity: 10W-30
- Engine oil capacity: 5.5 quarts (with filter change)
- Engine oil type: Synthetic or semi-synthetic blend
These recommendations refer to the stock engine setup for a 1999 Trans Am. If your vehicle has any performance modifications, please refer to the owner's manual or consult with a professional mechanic for the correct oil type and viscosity. Always check the oil level regularly and change the oil according to the maintenance schedule specified in your owner's manual.
