An independent Internet-based oil analysis laboratory and consultancy. Oil analysis reports available online.

A nonprofit research organization specializing in the chemistry and technology of sulphur and its compounds relating to the sulfur and sour gas industries. Based in Calgary, Alberta, Canada.

Oil and fluids analysis for predictive maintenance and tribology.

Geochemical analyses for exploration and production applications. Based in the Woodlands, Texas.

Third party inspection services for chemical, petrochemical, petroleum, bulk drugs and pesticide storage equipment. Also undertakes inspection of API 5L SAW Pipes. Based in India.

Planning and implementing crude oil testing programs.

Oil, coolant and fuel analysis for the North American transportation industry.

Moisture measurement and monitoring technologies.

Analysis of crude oil, diesel, gasoline, jet fuel, kerosene, lube oil, naphtha and petrochemical solvents by ASTM and other standard methods. Based in Houston, Texas.

Testing oil, fuel, grease, coolants and refrigerants as well as lubrication studies, tribology and condition monitoring.

Fuel analysis for petroleum vendors, users and environmental work. Cathodic protection services.

Mineral and fluid analyses for analysis of reservoir connectivity and stratigraphic correlation. Isotope services.

Analyzes engine trankcase oil and transmission oil to diagnose engine problems and most efficient oil change schedule. Based in Spokane, Washington.

Specialist in oil analysis, predictive and preventative maintenance and condition monitoring. Lubricating and transformer oil testing includes wear metal analysis, dga and pcb testing.

Gas-sieve technology for greater accuracy in surface soil surveys for oil and gas exploration. Located in Wichita, Kansas.

Laboratory tests on oil, grease, coolants, fuel and transformer oil. Most results available within 24-48 hours. Based in Tampa, Florida.

Testing refined hydrocarbons for petroleum suppliers and users.

Testing, analytical, and certification services of automotive fuels, diesel, jet fuel, crude and other petroleum products.

PTI provides services to evaluate and characterize crude oil. Products include crude assays, newsletters highlighting crude quality changes and an extensive database on crude fields.

Testing and analysis for oils, fuels, coolants and water-based fluids with an emphasis on the transportation, industrial, oil and gas, off-highway and power generation industries.

Independent ISO 9002 certified petroleum, petrochemical, and environmental testing laboratory in Houston, Texas.

Professional oil analysis service for individuals and industry in Rugeley, England.

Used oil analysis for gasoline and diesel engines. Web based software capable of managing sampling programs for large fleets of equipment.