On a track, the extra boost given by premium can mean a few tenths of a second difference on a lap time. In the real world, it barely affects performance, or fuel economy. Consumer Reports advises that premium should only really be used in your car if your ownerâs manual mandates it.
1 Shielded metal arc welding (SMAW) - also known as stick welding or electric welding, uses an electrode that has flux, the protectant for the puddle, around it. 2  The electrode holder holds the electrode as it slowly melts away. 3  Slag protects the weld puddle from atmospheric contamination.
MIG welding is an acronym for Metal Inert Gas Welding. This process is sometimes also referred to as Gas Metal Arc Welding (GMAW). MIG Welding is used for aluminum as well as other metals and can be automatic or semi-automatic. MIG Welding uses a wire that is connected to a direct current source which acts as an electrode and combines two pieces of metal through continuous flow by use of a welding tool or gun.