It performs better at extreme temperatures than conventional oil. You can also extend change intervals saving you some money and time.
Havoline Synthetic is just as good as any other synthetic.
Yes, Synthetic oil is synthetic oil no matter who makes it.
Yes, your 50% off coupon is good for an oil change using synthetic oil. The coupon is good for an oil change using any oil of your choosing.
You need to think about what you are going to be using it for. Also, whether the oil is synthetic or not. Buying good oil is very important. Synthetic oil is not always good.
yes,of course.
Yes, without any issues. That's what synthetic blend oils are (better than conventional oil, not quite as good as pure synthetic).
All major brands of full synthetic are good.
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.
yes
You can use conventional or synthetic oil in your Toyota. Unless you do some towing, driving in the mountains, or drive in hot temperatures synthetic oil is of no real benefit.