Yes, or you can mix them. Just bear in mind that if you mix them, you must maintain as if it were straight conventional oil and that by mixing, you lose pretty much all of the benefits that synthetic oil has.
No, you can even mix synthetic with conventional oil. It will do no harm at all.
Yes, and you can even mix them together.
Yes, you can not only switch you can mix synthetic with conventional oil.
It is a combination of synthetic oil and conventional oil.
No it is fine to switch back to regular oil.
5w30. It can be synthetic, conventional, or a blend.
Yes, anything mid 80's and up can be switched between conventional oil and synthetic oil. Anything older (that was around when zinc was found in oil, or when cork gaskets were used) should stick to conventional oil. It's actually federally mandated that conventional and synthetic oils be interchangable.
5W-20 motor oil can be either synthetic or conventional, depending on the brand and formulation. Synthetic motor oils are engineered to provide better performance and protection under extreme conditions compared to conventional oils. Always check the label for specific information regarding the oil's composition to determine if it's synthetic or not.
Yes, just make sure the weights are the same so it will be compatible with your vehicle.
synthetic motor oil doesn't break down nearly as fast as conventional oil it also can have greater lubrication and anti rust protection.
Yes, you can mix conventional oil with synthetic oil with no problem.
5W30. It can be synthetic or conventional.