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.
1 Find out the slope of your roof. 2  The slope is given as rise-over-run, meaning the distance up over the distance over. 3  This measurement will typically be a measurement over 12 inches (30.5 cm), something like 4/12 or 8/12. 4  Convert this to the equivalent in degrees and as a decimal.