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.
This 100 square feet (sq. ft.) section of roof, in roofing terms, is equal to one roofing square (or 1 sq.). The measurement of your total roof surface area determines how many squares of roofing shingle area for the roof as well as the amount of roofing materials that will be needed to complete the job.