Heating oil prices can fluctuate widely over time and by location. 1  From January 2005 to March 2010, the average price nationwide was $1.95-$2.95 a gallon; from January to March 2012 the average weekly price was $3.85-$4.12. 2  A building/mechanical permit is usually required to replace a furnace.
Quick Answer. A MasterCard has a total of 16 digits. MasterCard, as well as most major credit card systems, use the ANSI Standard X4.13-1983 system, in which each digit identifies a particular attribute of the card. . Keep Learning.
Master Card always had 16, Visa has 16 now, but a few banks issued them in 13 prior to 2000 (Y2K), Discover 16, and Amex has 15. Visa and MasterCard both use sixteen numbers. Visa and Master cards have 16. The prefix identifies the bank or credit card company that issues.