A multi-functional composition for use as an additive for fuels and lubricants. Therefore, to improve the tightness over a temperature range of \u221240\xb0 C. The resultant blends manifest unexpected compatibility characteristics, increased tensile strength, and improved process characteristics, e. In response to determining that the first disk had the most recent detected error, incrementing the number of consecutive errors of the first disk by one. Certain embodiments include various modular medical devices for in vivo medical procedures. The core is heated in an oxidative atmosphere and then heated in a non-oxidative atmosphere.