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Interchangeable Low-Viscosity Base Oil (<20.5 cSt @ 40°C)

  • Base oils

Interchangeable Low-Viscosity Base Oil (<20.5 cSt @ 40°C) appears in 1 of the 2,179 car-care products CarCareTruth tracks (as of August 2026).

The finished-product SDS (Mopar 8/9-Speed Fluid, version 6.10, issued 2024-06-21) classifies the overall mixture as 'Not Applicable' under GHS/OSHA HazCom — no signal word, no hazard statements, not aspiration-hazard classified — and SDS §15 states Proposition 65 warnings are 'None Reported' for the finished product. The finished-product viscosity (26 cSt at 40°C per SDS §9) sits above the 20.5 mm²/s CLP aspiration-hazard exemption threshold regardless.

This is a generic, trade-secret-withheld base-oil group name used in the finished product's Safety Data Sheet rather than a single named substance with its own CAS number: "Interchangeable low-viscosity base oil (<20.5 cSt @ 40°C)," disclosed at a 0-90% concentration range in SDS §3. This wide, non-specific disclosure is typical of a manufacturer reserving the right to substitute among several qualifying base-oil stocks that meet the same viscosity specification without having to reissue the SDS for a supply-chain swap.

Independent manufacturer documentation for the finished product (Mopar 8 & 9 Speed ATF, part 68218925AB) describes the fluid as full synthetic, consistent with this being a synthetic base-oil group rather than conventional mineral oil. The finished product's SDS classifies the overall mixture as not meeting the OSHA Hazard Communication Standard's definition of a hazardous chemical.

Health & environment profile

VOC
no
Prop 65 listed
no
Asthmagen
no
EPA Safer Choice
no
Aquatic toxicity
no
Biodegradable
no
Bioaccumulative
no
Persistent
no
Ozone depleting
no
Microplastic
no
PFAS
no
Purpose: Primary carrier base oil, disclosed at 0-90% by weight (specific identity and exact percentage withheld as a trade secret per SDS §3). Provides the bulk lubricating and heat-transfer medium for the finished ATF; the finished fluid is independently confirmed full-synthetic (TDS/manufacturer documentation), consistent with a synthetic base-oil family.

Common questions about Interchangeable Low-Viscosity Base Oil (<20.5 cSt @ 40°C)

What is Interchangeable Low-Viscosity Base Oil (<20.5 cSt @ 40°C) used for in car care?
Primary carrier base oil, disclosed at 0-90% by weight (specific identity and exact percentage withheld as a trade secret per SDS §3). Provides the bulk lubricating and heat-transfer medium for the finished ATF; the finished fluid is independently confirmed full-synthetic (TDS/manufacturer documentation), consistent with a synthetic base-oil family.
Is Interchangeable Low-Viscosity Base Oil (<20.5 cSt @ 40°C) a VOC?
No. Interchangeable Low-Viscosity Base Oil (<20.5 cSt @ 40°C) is not classified as a volatile organic compound (VOC).
Is Interchangeable Low-Viscosity Base Oil (<20.5 cSt @ 40°C) on California's Proposition 65 list?
No. Interchangeable Low-Viscosity Base Oil (<20.5 cSt @ 40°C) is not on California's Proposition 65 list.

1 product contain this

Related

Health and environment notes translate the manufacturer Safety Data Sheet, the GHS classification, and authoritative regulatory listings (California Prop 65, EPA). Not medical advice. They describe the ingredient itself; whether a hazard applies to a finished product depends on its concentration and how it's used.