not a good idea 0w20 is very thin oil. unless your engine calls for it it will go right through your piston ring & burn the oil. 10w 30 is a much thicker weight.
Yes. SAE 0W20 means that the oil has zero viscosity in winter. This oil does not exist, which is just as well because if it did it would drain right down into the sump leaving the engine unlubricated. Several companies make a SAE 0w20, including AMSOIL and Toyota. In cold temperatures the oil is thicker than at warm temperatures. Because it has a lower viscosity, it lubricates the engine faster than a higher viscosity oil. Toyota is specifying 0w20 next year.
0W30 or 5w30
FWIW, my Honda dealer here in Mpls told me the Honda brand 0W20 oil is SEMI-synthetic and NOT full synthetic. That seems logical to me because they charge $39 for a 0W20 oil change and to get full synthetic almost anywhere it cost you around $60 for an oil change. Full synthetic Mobil 1 0W20 cost $6.50 a quart at Walmart, so you are already over $33 just for the oil. Add labor and a good filter and your at the $60 mark.
0w30
Synthetic 0W20
Castrol edge 0W30
5w20 or 0w20- either is ok by Toyota
0w30 synthetic
The 2011 Toyota Camry takes SAE 0W20 motor oil. That is the best oil for that vechile.
!0w30 is the weight of the oil in the cars. It starts at 10 and goes to 30 as it heats up.
Use Mobil 1 or equivalent.