No, it's not OK. You should use at least 5W30. In summer you can use 10W30.
Use exactly what Toyota recommends which is more than likely 5w20 and not 5w30.
5w20 is used in 2009 toyota camrys.
In the 2.4L I4- 0W-20 synthetic. In the 3.5L V6- 5W20 synthetic (per Owners manual)
The best type of oil to use in a 2000 Toyota Avalon is 5w20. This provides a good balance of viscosity with the ability to work in most temperatures.
Just use what Toyota recommends unless you live in a extremely cold place,then I'd go 0w20 because it flows better in the cold.
The Toyota Camry has been in production for a number of years. Identifying the OE recommended oil and viscosity is dependent on production year and type of use the engine is subject to, and its operating environment (summer, arctic, etc). The 2013 Toyota Camry with the 2.5L 4-cylinder options (both gasoline and Flex-Fuel) can use API rated 0W20 and 5W20 year round.
5w20 or 0w20- either is ok by Toyota
If your car doesnt require it I would stick with the 5w30 rather than spending more on 5w20
5w20
SAE 5w20 conventional or synthetic.
5w20
SAE 5w20 any major brand.