View source for Detroit Diesel v92 Oil Analysis Limits

A used oil analysis program such as the Detroit Diesel Power Trac® oil analysis program is recommended for monitoring crankcase oil in all engines. Oil analysis consists of a series of laboratory tests conducted on the engine lubricant. Most tests reveal conditions of the engine, while some indicate the condition of the lubricant. The "Warning Limits"listed in Table 5-20 show what each test evaluates. Since an oil analysis cannot completely assess the lubricating oil for continued service, it should not be used to extend oil drain intervals. An oil analysis program with regular sampling is recommended, and the oil should be changed immediately if contamination is present in concentrations exceeding the warning limits listed. These limits are provided for guidance for a single sample analysis. It should never be concluded that the engine is worn out based on a single measurement that exceeds the warning level. Imminent engine wearout can only be determined through a continuous oil analysis program wherein the change in data or deviation from baseline data can be used to interpret the condition of engine parts. Confirmation for necessity of engine overhaul should be based upon operational data (for example, increasing oil consumption and crankcase pressure) and physical inspection of parts. Warning Limits are based on a single oil sample taken by an accepted sampling method. These values indicate the need for an immediate oil change, but do not indicate internal engine malfunctions requiring engine teardown.

{| class="wikitable"
|+
!Category
!
!ASTM 
Designation
!Two Cycle
(57,71,92)
|-
|Engine Combustion
|Pentane Insolubles Mass (% Max)
|D893
|1.0
|-
|Engine Combustion
|Carbon (Soot) Content, TGA Mass (% Max)
|E1131
|0.8
|-
|Engine & Oil
|Viscosity at 40°c St (% Max. Increase)/(% Max. Decrease)
|D445 / D2161
|40.0 / 15.0
|-
|Oil
|Total Base Number  (TBN)   (Min) / (Min)
|D664 / D2986
|1.0 / 2.0
|-
| rowspan="4" |Engine
|Water Content (dilution) Vol.  (% Max)
|D95
|0.30%
|-
|Flash Point °C Reduction (Max)
|D90
|40.0
|-
|Fuel Dilution Vol. (% Max)
|D3524
|2.5%
|-
|Glycol Dilution (PPM Max)
|D2982
|1000
|-
| rowspan="4" |Engine Wear
|Iron Content PPM (Fe Max)
|D5185
|150
|-
|Copper Content PPM (Cu Max)
|D5185
|25
|-
|Sodium Content PPM (Na Over Baseline Max)
|**
|50
|-
|Boron Content PPM (B Over Baseline Max)
|**
|20
|}
<nowiki>**</nowiki> Elemental analysis is conducted using either emission or atomic absorption spectroscopy.  Neither method has an ASTM designation.