For transit fleets, coolant entering engine oil can turn a relatively manageable maintenance issue into a major engine failure. Detecting glycol in the lubricant provides an important early warning that allows maintenance teams to investigate the source before extensive damage occurs.
Glycol contamination usually points to an internal coolant leak involving components such as head gaskets, cylinder heads, liners and/or seals. Coolant contamination can interfere with lubrication, contribute to deposit and sludge formation and accelerate wear. This makes glycol detection particularly valuable in buses, where high utilization and demanding duty cycles can allow developing problems to progress rapidly.
Lab analysis can identify evidence of coolant that may not be apparent through routine inspections. Eurofins TestOil offers glycol testing and recommends investigating an engine for internal coolant leaks following a positive glycol indication.
A comprehensive engine oil analysis program can evaluate multiple indicators together, including:
- Glycol or other evidence of coolant contamination
- Sodium and potassium associated with certain coolant formulations
- Water contamination
- Changes in viscosity and lubricant condition
- Iron, copper, and other wear metals indicating developing component wear
The real value comes from interpreting and trending these findings over time. A developing coolant leak may produce changes across several parameters before an engine displays obvious symptoms. Trend analysis allows maintenance teams to distinguish an isolated result from an emerging mechanical condition.
For transit fleets managing many vehicles, this transforms oil analysis from a routine maintenance procedure into an early-warning system. As discussed in Eurofins TestOil’s overview of used oil analysis for transit fleets, evaluating contamination, wear metals and lubricant condition together can help identify developing problems before they shorten engine life.
To schedule used oil testing, visit https://testoil.com/trustplus-oil-analysis/start-testing-now/; call 216-251-2510; or email testoil-sales@et.eurofinsus.com.
With more than 30 years of experience in the oil analysis industry, Eurofins TestOil focuses exclusively on assisting industrial facilities with reducing maintenance costs and avoiding unexpected downtime through oil and fuel analysis program implementation. As industry experts in diagnosing oil-related issues in equipment such as turbines, hydraulics, gearboxes, pumps, compressors and diesel generators, Eurofins TestOil provides customers with same-day turnaround on routine oil analysis testing.
About Eurofins – the global leader in bio-analysis
Eurofins is Testing for Life. Eurofins is the global leader in food, environment, pharmaceutical and cosmetic product testing, and in discovery pharmacology, forensics, advanced material sciences and agroscience Contract Research services. Eurofins is also a market leader in certain testing and laboratory services for genomics, and in the support of clinical studies, as well as in BioPharma Contract Development and Manufacturing. The Group also has a rapidly developing presence in highly specialised and molecular clinical diagnostic testing and in-vitro diagnostic products.
With over 61,000 staff across a network of 940 laboratories in 59 countries, Eurofins’ companies offer a portfolio of over 200,000 analytical methods. Eurofins Shares are listed on Euronext Paris Stock Exchange.
