S10/T10 Blazer 4WD V6-173 2.8L VIN B 2-bbl (1983)
Engine Oil: Technical Service Bulletins
Engine Oil - Discoloration Due to Added Dye
Number:
83-I-19
Section:
VI
Date:
Dec., 1982
Subject:
ENGINE OIL DISCOLORATION - 1983 2.0L L4 AND 2.8L V6
TO:
ALL CHEVROLET DEALERS
Certain engine assembly plants make use of an engine oil dye from time to time in various engines to aid in detecting engine oil leaks
during the assembly process. The dye used causes the oil to glow bright yellow when exposed to a blacklight.
Some of the dye material used gives the engine oil a slight red tint and in some cases has been mistaken for automatic transmission fluid.
The dye is in no way harmful to the engine, and the oil should not be changed if the above described conditions are encountered.
