Standards & approvals

API CF

API's service category for indirect-injection diesel engines, tolerant of higher-sulphur fuel. An earlier category in the API service classification, written for the engines of its era; it still appears on datasheets alongside the current categories.

Name
Diesel engine oil, API CF performance level
Issued by
API (American Petroleum Institute)
Category
Engine oil performance
Status
Withdrawn
Verified
30 August 2026 · Source

Products meeting API CF

Engine oils

Automatic transmission fluids

Agricultural multifunction oils

Small-engine & forestry oils

Marine lubricants

API standards

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