specifications. If your vehicle was originally charged with R12 refrigerant, for example, the oil type specified, 'mineral', will not apply. Additionally, General Motors issues Bulletin # 02-01-39-004B replacing PAG 150 oil with a lower viscocity oil.
The term square in reference to roofing materials refers to 100 square feet of roof area. One square of slate is the amount of slate that it takes to cover 100 square feet of roof area. A 10 foot x 10 foot section of roof would equal one square. So would a 4 foot x 25 foot section. Ditto for a 5 foot x 20 foot.
Ranch homes, mansions and larger homes may have around 2,000 square feet of roof space. The cost of roofing material is often measured in what are known as squares consisting of 100-square-feet each. A homeowner can find the square footage of the roof in one of several ways, depending on comfort level and safety.