Independent technical reference
Understand the API, ACEA and manufacturer standards behind modern engine oils—without the jargon.
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Start with the standard
Browse independent organizations or specifications written by vehicle manufacturers.
International and regional classifications for engine performance and oil quality.
OEM requirements designed around specific engines, service schedules and emissions systems.
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The learning path
Start with the owner’s manual and find the required viscosity and specification.
Learn what each organization or manufacturer approval actually requires.
Confirm the oil carries every required claim—viscosity alone is not enough.
Technical library
Mopar ATF+4, CVTF+4 and 8 & 9 Speed ATF are separate service fluids for different Chrysler, Dodge, Jeep, Ram and Fiat-derived transmissions. Learn what MS-9602 means, why ATF+4 can replace some older ATF+ fluids but not newer CVT or ZF applications, and how to verify the right fluid.
Nissan Matic S, CVT Fluid NS-2 and CVT Fluid NS-3 identify different transmission-fluid requirements. Learn why Matic S is not CVT fluid, why NS-3 does not automatically replace NS-2 in an older vehicle, and how to verify the correct service fluid.
DOT brake-fluid labels describe regulated minimum performance categories, but they do not create a universal upgrade path. Learn why DOT 5.1 is not silicone fluid, why DOT 4 LV matters to modern brake controls, and why the vehicle requirement still decides.
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Oil Specifications for iOS
Keep essential organization and manufacturer oil specifications close at hand on iPhone and iPad.
View on the App StoreBuilt for quick reference