The U.S. aircraft register, updated daily
Parts

Eng Oil

No failure report names the eng oil. 2 FAA approvals let 2 companies make a replacement eng oil, Skandia, INC. holding the most (1).

Approved replacement parts 2 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a eng oil and sell it as an approved part for the models named. These are the companies holding such approvals for a eng oil:

For these models most: Messerschmitt-Bolkow-Blohm BK 117 (1), Beechcraft 1900 Airliner (1).

MakerPartReplacesFitsGrantedStatus
Skandia, INC.Eng Oil Cooler Air Intake Boot Set SK2243Modification PartTextron Aviation Inc. 1900D2017-12-18current
Rogerson KratosEng. Oil T/P Indicator 117-902041117-902041Eurocopter Deutschland BK117 (C-1, C-2)2002-05-14current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.