Yes but I would not mix these as the viscosity is not the same.
Mobil 1 0W-40 fully synthetic motor oil's wide viscosity range provides unsurpassed levels of protection and an overall smooth driving experience.
Recommended engine oil for 2.0 litre TFSI engine on VW Golf GTI is Mobil1 5W30 or Mobil1 0W40. You can use a different brand with these viscosity ratings, but make sure it is FULLY SYNTHETIC,( NOT A SYNTHETIC BLEND or a mineral based oil). I've researched and asked VW service departments because I own a 2007 Golf GTI and it's a MAGNIFICENT car!
5w-40 fully synthetic
avoid fully synthetic oil use semi
10w-40 fully synthetic or 0w-40 fully synthetic are most popular
All major brands of full synthetic are good.
FOR MOST AMBIENT TEMPERATURE RANGES 10w/40 FULLY SYNTHETIC ENGINE OIL IS SUITABLE FOR THE MITSUBISHI 3000GT/GTO 3 LITRE V6 TWIN TURBO (6G72 ENGINE).
It is not required. You can use conventional or synthetic oil.
Fully synthetic 5w/30
Yes. Marvel mystery oil is fully compatible with synthetic oil.
Vienna sausages is fully cooked