Skip to Main Content
Skip Nav Destination
ASTM Selected Technical Papers
Oil Flow Studies at Low Temperatures in Modern Engines
By
H Shaub
H Shaub
1
Center for Innovation, Inc.
,
Irving, TX 75038 Vice Chairman, Subcommittee D02.07 Symposium Chairman and Editor
Search for other works by this author on:
ISBN-10:
0-8031-2857-6
ISBN:
978-0-8031-2857-6
No. of Pages:
177
Publisher:
ASTM International
Publication date:
2000

Two series of test oils were obtained for the Low Temperature Engine Performance (LTEP) task force activities: (a) SAE 0W-30, 5W-30, 10W-30, 15W-40, 20W-50 and 25W-30 grades were fully on-specification commercial oils (LTEP 1–7), used in cold starting and Phase I pumpability studies, (b) experimental test oils for Phase II pumpability work (LTEP 20 series) either did not meet the then-current SAE J300 pumping viscosity (TP-1 MRV) limits, or showed significant D5133 gelation index values, and included nominal SAE 5W-30, 10W-30 and 15W-40 grades. LTEP participating labs provided rheological data on the oils including measurements by D 445, D 3829, D 4684, D 5133, and D 5293. Multi-temperature MRV and CCS measurements allowed correlation to the exact engine test temperatures by fitting viscosity and yield stress data to equations. The functional form of the equations is presented and explained, and the fitted coefficients are tabulated. Gelation index and gelation index temperature values, were simply averaged for each oil. For the D 3829 and D 4684 methods that measure yield stress in addition to viscosity, an adjustment was made to the measured viscosity before fitting, to allow for yield stress effects.

1.
Cold Starting and Pumpability Studies in Modern Engines
, ASTM Research Report RR-D02-1442, November, 1998.
2.
SAE J300,
Engine Oil Viscosity Classification
, Rev. Dec95.
3.
May
,
C. J.
,
Minutes of ASTM Committee D-2, Subcommittee 7, Section C
,
Low Temperature Engine Performance (LTEP) Task Force
,
09
12
1996
.
This content is only available via PDF.
You do not currently have access to this chapter.
Close Modal

or Create an Account

Close Modal
Close Modal