Probably 5W-30 depending on your climate.
5W30 oil.
It should say it on the oil cap.......5w30.
5w-30
5w305w30
5W-30 is the preferred oil viscosity
generally 5w 30
For a 2003 Chevy Suburban (all engine sizes), the recommended viscosity is 5W30.
The oil pressure switch on a 1998 Chevy Blazer is on the side of the engine block. It is located above the oil filter.
in the oil pan
The motor oil capacity of the 1998 Toyota Rav4 is 4 quarts. Low viscosity PAG 46 oil is recommended for this vehicle.
Single viscosity is high quality oil. Mulit-viscosity oil is used for in the winter.
The recommended oil type for a 1973 Chevy 454 engine is 10w-30. This provides a good balance of lubrication and viscosity.