yes, but stick with it, same brand and same kind
It is a combination of synthetic oil and conventional oil.
No, you can even mix synthetic with conventional oil. It will do no harm at all.
Yes, and you can even mix them together.
5w30. It can be synthetic, conventional, or a blend.
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.
10W30, it can be synthetic, conventional, or a blend.
Your engine will be protected and you can extend the change interval by around 2,000 miles. Other than that nothing will happen. You can even mix synthetic with conventional oil.
5W30. It can be synthetic or conventional.
Change it every 5,000 miles if you use conventional oil or every 7,500 if you use synthetic oil. Also change the filter at every oil change.
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.
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.
Yes, you can not only switch you can mix synthetic with conventional oil.