The Structure (Physical Description) of cartilage tissue in general. Cartilage is a connective tissue consisting of a dense matrix of collagen fibres and elastic fibres embedded in a rubbery ground substance. The matrix is produced by cells called chondroblasts, which become embedded in the matrix as chondrocytes. That is, mature cartilage cells are called chondrocytes.
Scion lists its oil requirement as 5w20 for normal climates. If you live in a colder climate, use an oil with a lower viscosity, such as 5w10. This thinner oil will move through your engine more quickly when you attempt to start in cold weather.
Mineral oil is used in all old R12 (Freon) systems. It has worked well for years and would be the recommended lubricant for all R12 applications. R12 has a high affinity for mineral oil, meaning it takes mineral with it as it travels through the system. Mineral oil does not mix with R134a and there for not usable. Also sense its compatible with all R12/R134a compressors it could be used in a R12 system that may be retrofitted latter. 2  They recommend that you put 1/2 of the oil in the compressor and the other 1/2 in the accumulator or evaporator if it does not have an accumulator.