Yes, you can.
Yes.
Yes, and it is in your mannual.
Either as the choice is yours. If you use synthetic then extend the oil change interval by 2,000 miles.
Yes, you sure can and you can extend the oil change interval when you switch to synthetic.
The 2008 Chevrolet Equinox runs on regular unleaded.
No, old oil can use synthetic engines
yes you can use synthetic oil if you want to
Consult your drivers manual for the correct oil to be used.
The engine uses 5W20. It can be synthetic, conventional, or a blend.
SAE 5w-20 any major brand of conventional or synthetic oil. If you have over 100,000 miles on the odometer use a High Mileage Oil.
Use the exact weight recommended by Chevrolet. Listed in your owners manual and more than likely on the oil fill cap. Use any major brand as they are all excellent. You can use synthetic or conventional, your choice. I personally see no benefit to synthetic unless you operate the vehicle in extreme climates.
You can use synthetic, synthetic blend, or conventional oil. It is your choice.