It's light and strong.
Because it is cheap and lightweight.
Steel.
No list available, but almost all cars can have either type
Cars made from aluminium use less fuel than cars made from steel because aluminium has a low density this makes the car to be lightweight. Whereas with steel, it has a high density so it makes the car to be very heavy. So if steel was used over the same journey more fuel would have to be used and therefore less fuel would be used if you used the metal aluminium.
It's a wheel
Most cars have very little aluminum so your question has no relevance.
Aluminum is not very strong so you be the judge!!! ---- Aluminium is used in sports car and domestic car manufacture all the time. Sports cars use it to reduce weight by replacing bodywork with aluminum panels and most modern domestic vehicles use aluminum cylinder heads.
Aluminium has a low density and is not corroded.
oil, gas, cars(think), wood, aluminium, fish
Aluminium is more expensive than Steel
They use aluminium instead of iron because aluminium is lighter.
in standard production cars its plain old steel.However,in specialist cars, racing cars, expensive sports cars etc weight reduction is more important than cost. Here you may see kevlar, aluminium,and a number of high strength low weight alloys in use.