Accredited Engine Oil Quality Testing
AGT Labs provides professional Engine Oil Testing Services for diesel, natural gas and gasoline engine oils. Our Houston laboratory performs ISO/IEC 17025 accredited tests for copper strip corrosion, color, density and API gravity, Ramsbottom carbon residue and refractive index.
Our Engine Oil Testing Services support fleet managers, industrial plants and marine operators with accredited data to confirm product identity, flag contamination or mix-ups, and check corrosiveness toward copper-containing engine parts.
Accredited Test Parameters
Every engine oil test listed below is on our PJLA ISO/IEC 17025 scope of accreditation (Certificate L25-276).
Copper Strip Corrosion
ASTM D130Color (Tristimulus)
ASTM D6045Density & API Gravity
ASTM D5002Ramsbottom Carbon Residue
ASTM D524Refractive Index
ASTM D1218Industries We Serve
Accredited engine oil data for transport and industrial operators.
Trucking Fleets
Verifying incoming engine oil quality and screening for contamination in heavy-duty diesel fleets.
Construction & Mining
Checking engine oils used in off-road equipment for color change, density shifts and corrosiveness.
Marine & Offshore
Accredited quality checks on marine engine lubricants before use and during storage.
Power Generation
Checking oils for stationary natural gas and diesel generators to support backup power readiness.
Industrial Manufacturing
Quality verification of engine oils and lubricants for plant compressors, pumps and engines.
Rail Transport
Locomotive engine oil testing for product verification and contamination screening.
Laboratory Capabilities
Analytical Systems
Our engine oil testing uses copper strip corrosion baths, automatic tristimulus colorimeters, digital density meters, gravimetric carbon residue equipment and refractometers.
Advanced Technical Support
- ISO/IEC 17025 Accredited Laboratory Operations
- Product Verification & Mix-Up Screening
- Rapid 24-Hour Turnaround for Critical Samples
- Samples Accepted Nationwide at Our Houston Laboratory
Sampling, Handling & Chain of Custody
Effective Engine Oil Testing Services require consistent sampling practices. We provide sampling pumps, tubing, and clean bottles to ensure your sample accurately reflects the condition of the lubricant in your machine.
Download Chain of Custody FormContainers & Handling
- Use clean, dry plastic bottles provided in our sampling kits.
- Sample from a live zone (e.g., after the pump, before the filter) while the engine is warm.
- Avoid sampling from the drain plug bottom to prevent sludge bias.
Transport & Logistics
- Label with Equipment ID, Hours on Oil, and Oil Brand/Grade.
- Ship promptly to our Houston laboratory.
- Include the oil brand and grade so results can be compared with a reference sample.
Quality & Reporting
Reports from our Engine Oil Testing Services give clear, defensible data for quality and maintenance records.
- COA with method references, results, and certified authorized signatory.
- Secure PDF delivery via our client portal.
- Measurement uncertainty available on request.
- Technical review of out-of-spec results.
Frequently Asked Questions
Which engine oil tests are accredited at AGT Labs?
Can you check whether the wrong oil was delivered?
Why test copper corrosion in engine oil?
Protect Your Assets with Engine Oil Testing Services
Need reliable condition monitoring for your fleet or plant? Contact our Houston technical team today for a custom oil analysis program.
Contact Technical Specialist