its the same process as changing synthetic oil, except you use regular oil.
Yes you can.
yes, if the car manufacturer dictates that regular oil is acceptable. If your car requires synthetic oil as dictated by your owner's manual, then DO NOT use regular oil. May void warranties if your car is still covered.
This depends on the oil that goes into the car. If it is synthetic you need to change it every 10,000 miles if it is regular than it needs to be every 3000-3500 miles.
Synthetic oil or a blend of Synthetic and regular oil is much better for your vehicle than regular oil alone. Synthetic oil is MUCH more expenshive. If you change your regular oil every 3 months or 3,000 miles I will be fine.
That's okay.
Oil changes are always necessary. If you mean can you mix conventional oil and synthetic, the answer is yes you can.
Yes
The best motor oil for you car depends on the car. Many old cars can only handle regular motor oil.
Synthetic. Turbos should always be synthetic.
3000 miles if using regular oil, 6000 if using synthetic. I use synthetic for my RSX-S, but regular would do for a base model.
It is recommended that oil be changed every 3,000 miles or 6 months (whichever comes first) for regular oil and 7,500 or 12 months for synthetic oil
Either as the choice is yours. If you use synthetic then extend the oil change interval by 2,000 miles.