ENTERPRISES PVT. LTD.

Call us at 91-22-29209201
E-10 NANDDHAM IND. ESTATE.,
MAROL MAROSHI ROAD, ANDHERI (E)
MUMBAI (INDIA)
Tel: 91-22-29209201 Fax: 91-22-66938662
E-Mail : mytol@vsnl.net
 

  WHAT IS USED OIL ANALYSIS
 

At the time of a motor oil or hydraulic oil change, a small sample of the used oil (50ml) is retained. The sample is sent to a laboratory for analysis.
 

   WHY TEST THE USED OIL
 

An analysis can spot wear and contaminants and monitor the oil condition in:

           = gasoline engines
           = propane engines
           = natural gas powered engines
           = automotive transmissions
           = industrial gearboxes
           = hydraulic/industrial circulating oil systems This analysis in invaluable in preventing costly equipment breakdowns, and in setting up a "preventive maintenance" program.
 

  HOW IS THE TEST PERFORMED
 
After the laboratory receives the sample, a series of tests are performed. The table below is a listing of each test, and the conditions detected by the test. All tests are not necessarily performed as each laboratory has an established series of tests.

  Conditions Detected
   
#
Abnormal Wear
Fuel Dilution
Dirt
Water
Coolant
Incorrect
Oil
Oxidation
Additive
Depletion
Glycol Test
 
 
 
 
*
 
 
 
Viscosity
 
*
 
 
 
*
 
 
Appearance/ Odor
*
*
*
*
 
*
 
 
Spectrometric Analysis
*
 
*
 
*
*
 
 
Alkaline Reserve
 
 
 
  
*
 
 
Blotter Spot Test
 
 
*
*
 
 
*
 
Water Content
 
 
 
*
 
 
 
 
Distillation
 
*
 
 
 
 
 
 
Flash Point
 
*
 
 
 
 
 
 

 
  SPECTROMETRIC ANALYSIS
 
In the spectrometer, an oil is electrically excited to the point where light is emitted. Each element present in the burning oil emits a light of its own particular color and frequency. The spectrometers translates the intensity of this rainbow of colors into a computerized readout.

A typical report from this test would list nine(9) major wear metals for industrial gear oil and hydraulic oil. Twelve(12) are reported for automotive oils.

The computer compares the amount of wear metals present with a fresh oil sample, and also records of samples from similar equipment. Also, the computer compares the output from previous samples taken from the same piece of equipment to establish wear trends.

The report should summarize the results for the customer, and recommend remedial action.
 
  WEAR METAL ORIGINS TABLE
 
METAL
ORIGIN
Aluminum
 Pistons, bearings, blower/turbo charges, pump vanes, thrust washers and bearings, blocks, oil pump  bushings, housing clutches, impellers, rotors
Chromium
 Rings, roller-taper bearings, liners, exhaust valves, coolant, rods, spools, gears, shafts, anti-friction  bearings
Copper
 Bearings, thrust washers, bushings, oil coolers, oil additives, wrist-pin bushings, cam bushings, valve-train  bushings, governor, oil pump, stearing discs, pump thrust plates and pistons, injector shields, wet clutches
Iron
 Cylinders, crankshafts, valve train, piston rings, clutch, pistons, rings, gears, bearings, liners, shafts,  plates, blocks, camshafts, pumps, PTO, shift spools, cylinder bores and rods, piping and components of  circulating oil systems.
Lead
 Bearings, gasoline additives, oil additives
Magnesium
 Oil detergent, oil alkaline reserve
Molybdenum
 Oil additive, friction modifier
Nickel
 Alloy, gear plating, valve guides and ring bands, shafts, anti-friction bearings
Silver
 Wrist-pin bushings, anti-friction bearings, silver solder
Tin
 Bearings, piston plating, alloy of bronze(copper/tin), bushings
Silica (silicon-Silicone)
 Ingested dirt and sand, gasket sealant, oil anti-foam additive, anti-freeze additive
Zinc
 Anti-wear oil additive ( zinc dialkyl-dithio-phosphate), galvanized parts in circulating oil systems

 
  OPERATIONAL BENEFITS OF TESTING
 


It is the backbone of any preventive maintenance program. A summary of the benefits are as follows:

  • Reduces unnecessary major repairs by detecting lubrication problems early. This provides time to schedule maintenance, and order replacement parts.
  • Eliminates premature oil change out by establishing correct drain intervals required by individual components under given operating and environmental conditions. The savings can be significant for a fleet operation.
  • Reduces expensive, unscheduled down-time caused by the unexpected failure of components.
  • Evaluates used-equipment purchases. A single oil sample prior to a purchase will give the purchaser a good idea of the internal condition of the engine, and transmission.
  • Allows the initial tracking of warranty problems. Preliminary data can be presented to support a warranty claim.
  • Determines the overall performance level of maintenance facilities and personnel.
     
  WHERE CAN I HAVE TESTED THE OIL
 
If you are a major fleet customer, contact your Lube Oil Sales Representative to arrange testing.

Major oil companies, service centers, and local labs in your area should be able to provide information on testing.