My 2007 camry hybrid consume 1liter of oil every 3000 km i drive in very hot climate about 44c and mountain road i changed oil as follow 0w20, 5w20, 20w50, 10w30 the oil consumed 1liter per 3000 km no oil leakage no oil on the sparks no blue somok from exuhast could any one tell me whay this happend

It depends on why/where the oil is going. The following discussion presumes there are no visible leaks, Be sure and check the drain hole on the bell housing for oil leakage.

If you are using a low viscosity non-synthetic oil, and are in a hot climate, and you routinely drive at freeway speeds, up to 15% of the oil will evaporate!!
The rate it is using is not 'excessive', and is no concern unless it increases over time.
It is actually PREFERRED (for long engine life) to have some consumption requiring fresh oil addition between changes.
Another sneaky cause can be a mis-marked dipstick leading to overfilling the crankcase. Next oil change, carefully note the oil level after running a few minutes, letting it sit 5 minutes then checking--with ONLY the manual stated quantity (use only the amount specified)
You might try running the oil level near the minimum level to see if the rate of use decreases.

This is regulated by the mileage of the car. When it gets time to change the oil. The message center will say "Change oil"

It depends on how many miles you drive annually, the environment your vehicle is driven in (dusty, hot, cold, humid, dry, etc), the type of oil you use (conventional, synthetic blend, or full synthetic), and the condition of your car's engine. You should consult your owner's manual and the data on your engine oil.

I drive a 1999 Mercury Mountaineer 5,0L and drive it about 1,500 miles annually. I use a synthetic blend oil and change my oil and oil filter twice a year. I change the oil in the spring so I have fresh oil for the hot summer driving season and I change my truck's oil in the fall after the hot summer driving season. Because my Mountaineer has a lot of miles on it, I use thinner oil in the winter 5/20 and thicker oil in the summer 10/20. I check my oil regularly and look at the color and feel the oil for grit. This has worked for me for many years and I have had good performance from my vehicles.

You can go on the different oil manufacture's websites and read their recommendations as well. There has been much debate about when to change the oil in a vehicle so you have to decide for yourself what schedule you want to follow.

Not for normal driving, a good quality oil grade SN or better is fine. If you drive hard, tow a lot, or drive in very dusty, hot or cold climates, a synthetic oil eg Castro Edge, is a good idea.

use any major brand 10W-30W in hot climates or use 5W-30W in mild climates, use no heavier weight oils

Climate has as much to do with your choice of motor oil as the amount of miles on the engine. If you live in a cold climate and your winter temps are often below freezing, you'll want to go with a lighter oil that will circulate better in the cold temperatures. Conversely, in a hot climate, a heavier oil that won't break down in viscosity would be a good choice. As far as the mileage goes, most oils are about the same and as long as you change your oil often, whatever oil you choose based on climate should suit you and the car well. I hope this clarifies your question. Best of luck!
Greg

Owners manual should tell you.

the most common source is the turbo shaft seals leaking oil.

The owner's manual calls for changing oil and filter every 7500 miles in normal service, or if driving in dusty conditions, offroad, or lots of low speed and idling (a taxi or maybe an unlucky commuter), go to the extreme service intervals of 5000 miles. Changing oil every 3000 miles is definitely NOT required.