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 vs TIG Welding. MIG and TIG welding are two types of arc welding, using metal electrodes and an inert gas as the shielding from oxidation at high temperatures. Both types of welding are relatively easy to learn, and the welding processes can be performed on all the common materials.