Yes. Synthetic oil is the same, but with additional conditioners. And yes, you can go from synthtic to reg oil, however I always recommend synthetic no matter what if the price is feasible.
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 is synthetic oil.
Here in Northern New England at the local "Oil and Go" today (January 2011) I saw the price for a synthetic blend oil change to be 64.95 plus tax. The price for a full synthetic oil change was 79.95. The price for a regular oil change was 34.95. I have not priced quarts of semi-synthetic oils at Walmart lately, but I can say the price of 64.95 is excessive when for 15 dollars more you can get a full synthetic oil change. It may very well be that today's semi-synthetic oil sells for 82 percent of the price of full synthetic, but I seriously doubt that. Rather I suspect the 35 dollar price of a regular oil change is to get people in the door, so they can be up-sold to an overpriced semi-synthetic blend oil change. After all, there isn't much money to be made in basic oil changes, unless your doing an awful lot of them. So keep in mind that when these folks checking your windshield wipers and air filters, it isn't because they are concerned about your safety or gas mileage. No, they want to sell you more stuff (stuff with a much higher profit margin than your basic oil change).
Firstly, by the huge price difference on the shelf ... lol! The synthetic is a bit more transparent ... the type I use is closer to dark red in color. If your car has a turbo, synthetic oil is better for it as it operates at a cooler temperature than ordinary 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.
Whatever you use it MUST be synthetic oil, it costs more but is worth it
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.
I will change my oil from conventional oil to synthetic oil on my next oil change.
No an oil filter just filters the oil no matter synthetic or not
Yes, semi synthetic is a blend of synthetic and conventional oil already.
It is conventional oil and contains no synthetic oil. 3000 & 5000 are part synthetic and part conventional. 7000 is a full synthetic oil.
form_title= Synthetic Oil form_header= Put synthetic oil in your car with help from the pros. When was the last time your oil was changed?*= _  Have you ever used synthetic oil before?*= () Yes () No What type of oil do your currently use?*= _ 
Synthetic is 100% synthetic. There are blends sold that are part synthetic & regular oil. Look for a quart that sates FULL or 100% Synthetic. If it says Synthetic Blend then it is not 100% Synthetic.Synthetic is 100% synthetic. There are blends sold that are part synthetic & regular oil. Look for a quart that sates FULL or 100% Synthetic. If it says Synthetic Blend then it is not 100% Synthetic.
Yes. Marvel mystery oil is fully compatible with synthetic oil.
Havoline Synthetic is just as good as any other synthetic.