AMSOIL Synthetic Lubricants are designed and engineered for extended drain service. The color of the AMSOIL on your dipstick (or ANY oil for that matter) has absolutely no bearing on whether or not the oil is suitable for continued use or if it should be drained and replaced. Use the recommended change intervals for both the oil and engine filters as specified by AMSOIL.

It is a common misconception that an oil’s color is an indication of how dirty the oil is. This is absolutely NOT TRUE. The color of an oil does not have any bearing on its lubrication ability. Most oil and especially diesel oil will turn black in the first few hours of operation due to contaminates generated by the combustion process and soot particles. The ONLY way to accurately determine an oil’s lubricating value or contamination level is through (spectrographic) oil analysis. Oil analysis is common practice used regularly in commercial, industrial, and fleet operations and can also be used for passenger cars, light trucks or any other application. In addition oil analysis will also determine the exact parts per million (ppm) of wear metals in your oil which provides an indication of any abnormal wear or specific components that need mechanical inspection in addition to checking for any fuel, water or glycol contamination. *At the end of this section you will find a listing of what oil analysis testing checks for.

The useful life of an engine oil is dependent on several factors such as quality of the oil, type of fuel, equipment condition, type and operating environment of the equipment and, most important, the type of filtration used. The filtration system and the oil are vital tools for preserving engine life. A highly efficient filter is essential to protect an engine by removing both liquid and abrasive contaminants held in suspension by a high quality premium oil such as AMSOIL. When using AMSOIL Synthetic Lubricants for extended drain intervals the AMSOIL Super Duty Filter must be changed at 12,500 miles or 6-months for gas engines and 10,000 miles or 6-months for diesel engines, such as the Ford Powerstroke or Dodge Cummings.

If the AMSOIL Dual-Gard or Dual-remote By-Pass Filtration Systems are used then the AMSOIL Super Duty full flow engine filter must be changed at the same intervals as specified above and the by-pass filter(s) changed as indicated by oil analysis results. The oil does not need to be changed when using by-pass filtration unless oil analysis testing indicates it is necessary.

• Component miles, oil miles, last oil change miles

• % presence of glycol, water, fuel

• viscosity @40 deg. C. and at 100deg. C.

• % solids

• soot, oxidation %, NOX%, TBN, TAN

• % iron, chromium, lead, copper, tin, aluminum, nickel, silver, manganese, silicon, boron, sodium, magnesium, calcium, barium, phosphorous, zinc, molybdenum, titanium, vanadium and cadmium

• recommendations and additional test results