System and method for determining oil grade

A system for determining a oil grade comprising:

• a temperature sensor;
• a pressure sensor;
• a electronic control module connected to said temperature sensor and said pressure sensor;
• wherein said electronic control unit receives a temperature signal from said temperature sensor and a pressure signal from said pressure sensor and determines said oil grade in response to said temperature signal and said pressure signal.

A method of determining an oil grade of a oil supply comprising:

• measuring a temperature of said oil supply;
• measuring a first pressure of said oil supply;
• measuring a duration of an event drawing oil from said oil supply;
• measuring a second pressure of said oil supply;
• estimating a pressure drop of a variety of oil grades in response to said temperature and said duration;
• determining an actual pressure drop of said oil supply in response to measuring said first pressure and measuring said second pressure;
• comparing said actual pressure drop to said estimated pressure drop;
• determining said oil grade in response to said comparing step.

A method for determining a oil grade used in a machine comprising:

• determining a pressure drop in an oil supply;
• determining a temperature in said oil supply;
• and
• determining said oil grade in response to said determining steps.