You can mix part synthetic oil with full synthetic oil.
Semi synthetic or synthetic blend is a combination of synthetic and conventional oil. Full synthetic oil is just that 100% synthetic oil.
Oil that comes out of the ground is not synthetic but is called crude oil. Synthetic oil is man made with synthetic compounds. They are both oil.
Synthetic oil manufacturers.
Yes, Synthetic oil is synthetic oil no matter who makes it.
Yes, that is what a synthetic blend is that they sell.
It is a combination of synthetic oil and conventional oil.
Synthetic oil is synthetic oil. Any major brand will be of high quality.
Synthetic oil is a chemically made substitute made from petroleum components as opposed to non synthetic which is made from crude oil.
It can be. The 5w20 is the weight of the oil which you can buy conventional or synthetic. If it is synthetic it will say so right on the container. If it does not say synthetic it is conventional oil.
You can use synthetic, synthetic blend, or conventional oil. It is your choice.
No an oil filter just filters the oil no matter synthetic or not