An impact protection apparatus has a body portion formed of a first resilient material and a number of members protruding radially outward from the body portion. The electric-mileage learning is performed by calculating a trip electric mileage using only information acquired in the CD mode before a change to the CS mode for the first time. The use of the tungsten compound with the secondary diarylamine andor the alkylated phenothiazine provides improved oxidation and deposit control to lubricating oil compositions. Primary and secondary communication relationships may be formed between devices to provide for system redundancy. Alternatively, a nitrogen-hydrogen forming gas or ammonia may be used to remove the photoresist mask. The first and second metal contacts are formed on a same side of the semiconductor structure.