Compositional analysis of re-refined and non-conventional lubricant base oils. Correlations to sequence VE and IIIE gasoline engine tests

Journal Article · Sat Oct 01 04:00:00 EDT 1994 · SAE Special Publication

DOI:https://doi.org/10.4271/941978· OSTI ID:81282

Stipanovic, A J; Smith, M P; Firmstone, G P; Patel, J A

In 1993, a Presidential Executive Order was issued requiring that federal agencies purchase lubricants containing at least 25% re-refined base oil. In light of this initiative, we have undertaken a program to characterize the chemical composition of re-refined base stocks, provided by a number of manufacturers, using column chromatography coupled with mass spectrometry techniques. The hydrocarbon-type distribution observed for the re-refined oils provides an index of their relative quality when benchmarked against conventionally processed `virgin` and certain non-conventional, high viscosity index (VI) base oils. Using statistical models which can predict lubricant performance in the ASTM Sequence VE and IIIE Gasoline Engine Tests from base oil compositional features and VI, it was determined that highly paraffinic synthetic and non-conventional base oils provide enhanced performance while re-refined oils generally exhibit predicted behavior comparable to an `average` `virgin` base oil, for most commercially available products. Sequence VE and IIIE test parameter predictions were found to be especially sensitive to the thioaromatic and multiring aromatic content of the base oil under evaluation. 11 refs., 5 figs., 6 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 81282
• Report Number(s): CONF-9410173--
• Journal Information: SAE Special Publication, Journal Name: SAE Special Publication Journal Issue: 1055; ISSN SAESA2
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
40 CHEMISTRY
ENGINES
GAS CHROMATOGRAPHY
GASOLINE
HYDROCARBONS
LUBRICANTS
OILS
REFINING
STATISTICAL MODELS
TESTING
VISCOSITY