Who told you it is not recommended? You can mix synthetics as long as they are of the same weight. You can even mix synthetic with conventional oil.
It might be... It's highly not recommended to mix regular and synthetic oils.
No, you could mix with synthetic blend but its not recommended.
Yes, you can even mix them.
5w30 oil is recommended. conventional, semi-synthetic and full synthetic oils are all compatible with this engine.
Yes you can mix different brands but I recommend you do not mix different weights. You can even mix synthetic oil with conventional oil. But as the weight of the oil is critical, do not ever mix one weight of oil with another, no matter if it is synthetic or conventional oil.
Yes, you can even mix it with conventional oil. Just make sure the weights are the same.
Yea they take synthetic oil, make sure you don't do otherwise cause you can not mix different oils!
Yes you can. Contrary to a popular belief it does not hurt to switch between or mix synthetic and conventional oils.
No, it is not safe to mix essential oils with isopropyl alcohol as it can cause skin irritation and other adverse reactions. It is recommended to use essential oils with a carrier oil instead.
No, you must use oils recommended by VW. Blends are verboten.
In a Brand new engine it is recommended that you get the rings seated before you start using Synthetic oils. So run your engine for 3,000 miles and then you can switch to a Synthetic.
Basically no Adding mineral to synthetic oils destroys the characteristics of the oil. Adding synthetic to mineral is waste of the more expensive synthetic oil with the same results as above. If you have to mix in emergency, get a complete oil change ASAP. You can use either mineral or synthetic oil for the same application but not mixed. Synthetic oils in cars is now used as it gives longer service intervals- typically 12 months or 12,000 - 20,000 miles. Mineral oils break down quicker and require changing more frequently 6 months or 6,000 - 10,000 miles