MS-11655 is Mopar’s material standard for Electric Steering Pump Fluid, a synthetic hydraulic fluid used in Chrysler, Dodge, and Jeep vehicles with electro-hydraulic power steering systems.
MS-11655 is engineered specifically for electro-hydraulic systems where an electric motor drives the hydraulic pump. It’s technically a hydraulic fluid, not a conventional power steering fluid, which explains why it behaves differently and why compatibility matters so much.
When fresh, the fluid appears green. It’s also formulated for use in central hydraulic systems and level control applications in compatible Mopar vehicles.
The current Mopar part number is 68088485AB, which replaced the older 68088485AA. Interestingly, this fluid is identical to GM part number 88901975, which is also a synthetic electro-hydraulic fluid used in GM vehicles with similar systems.
MS 11655 Alternative Fluids
While the factory-specified Mopar 68088485AB is the primary recommendation for MS-11655 systems, several high-performance aftermarket alternatives meet or exceed these specialized requirements.
Mopar 68088485AB
Chrysler Genuine Mopar Fluid 68088485AB Hydraulic Fluid
Mopar 68088485AB is the OEM electro-hydraulic power steering fluid for Chrysler, Dodge, and Jeep vehicles with electric steering pumps. This is the factory-specified fluid that meets the MS-11655 material standard.
The fluid appears green when new and is fully synthetic, though the bottle doesn’t always state “synthetic” on the label. It’s designed specifically for electro-hydraulic systems where an electric motor drives the hydraulic pump, rather than traditional belt-driven systems.
This isn’t interchangeable with ATF+4 or conventional power steering fluid. The chemistry is engineered for electric pump systems and the specialized seals used in these applications. Mixing it with other fluids can damage the pump and steering rack.
If your older vehicle still utilizes a mechanical pump, you are likely looking for Mopar MS-5931 power steering fluid.
Applications:
- Jeep Wrangler (2018+), Grand Cherokee (2014+)
- Dodge Challenger/Charger (2011+)
- Ram trucks with electro-hydraulic steering
- Other FCA/Stellantis models specifying MS-11655
Red Line Synthetic Power Steering Fluid
Red Line 30404 Power Steering Fluid
Red Line Synthetic Power Steering Fluid is a fully synthetic aftermarket fluid compatible with the MS-11655 and MS-90030 Mopar specifications.
It’s designed for electro-hydraulic power steering systems and also works in applications requiring traditional automatic transmission fluids like Dexron or Mercon.
Its kinematic viscosity at 100°C measures 7.0 cSt, while at 40°C it’s 31 cSt. The viscosity index of 199 indicates good temperature stability, though not as high as some competitors. Pour point sits at -58°F (-50°C), ensuring cold-weather operation. At -40°C, Brookfield viscosity is 5,400 cP, which is comparable to other MS-11655 compliant fluids.
Red Line claims 50% greater high-temperature viscosity retention and one-fifth the evaporation rate compared to conventional power steering fluids.
Also compatible with:
- GM, Ford, Toyota, Nissan, Honda power steering systems
- European applications (Mercedes-Benz, BMW, VW, Porsche, Volvo)
- Eaton Supercharger fluid replacement
Pentosin CHF 11S
Pentosin 1405116 CHF 11S
Pentosin CHF 11S is a fully synthetic hydraulic fluid that meets the MS-11655 material standard, making it a direct aftermarket equivalent to Mopar 68088485AB. It’s one of the most widely used alternatives for electro-hydraulic power steering systems in Chrysler, Dodge, and Jeep vehicles.
The fluid appears dark green and is engineered for lifetime application in modern hydraulic systems. Beyond power steering, it’s suitable for level control, hydro-pneumatic suspension, stability and traction control, convertible top hydraulics, and central locking systems. Pentosin guarantees full performance from -40°C to over 130°C system temperature.
Pentosin CHF 11s is formulated so that your steering will feel smooth and predictable no matter how crazy the weather gets. Most fluids get thick like molasses when it’s freezing and thin like water when it’s hot, but this fluid is engineered to stay at the perfect thickness all the time.
Because it stays liquid at extremely low temperatures, your electric steering pump doesn’t have to struggle or “choke” on thick fluid when you first turn the key. It flows instantly, which prevents the pump from wearing out prematurely or burning its own fuse.
Additionally, it can handle high engine heat without breaking down or easily catching fire, making the whole system safer and more efficient. In short: it’s high-tech insurance that keeps your steering effortless and your parts from breaking.
Also compatible with:
- Mercedes-Benz Sheet 236.3 (Q 1 32 0001)
- BMW/MINI (multiple part numbers)
- Audi/Volkswagen G 002 000, TL 52 146
- Porsche 000 043 203 33
- Ford WSS-M2C204-A
- ZF TE-ML 02K
Febi 06161
Febi Bilstein Central Hydraulic Oils 06161
Febi 06161 is a fully synthetic hydraulic fluid that meets the MS-11655 material standard, making it an aftermarket equivalent to Mopar 68088485AB. It’s formulated for electro-hydraulic power steering systems in Chrysler, Dodge, and Jeep vehicles, along with a wide range of European applications.
The fluid appears green and is designed for lifetime use in modern hydraulic systems. Beyond power steering, it works in level control, shock absorbers, hydro-pneumatic suspension, and central locking systems. Febi formulates this fluid so your steering feels smooth whether you’re dealing with freezing mornings or scorching summer heat.
The viscosity index of 313 means the fluid maintains consistent thickness across extreme temperatures. It doesn’t thicken like molasses when cold or thin out like water when hot.
This keeps your electric steering pump from struggling during cold starts, which prevents premature wear and blown fuses. The pour point of -57°C (-70.6°F) ensures the fluid flows instantly even in arctic conditions.
The fluid resists thermal breakdown, fights corrosion and wear, and prevents foaming and air separation issues that compromise hydraulic performance.
Also compatible with:
- BMW/MINI (multiple part numbers including 83 29 0 429 576)
- Audi/VW G 004 000 M2, G 002 000, G 002 500
- Porsche 000 043 204 89, 000 043 203 33
- Mercedes-Benz, Citroën, Peugeot, Volvo applications
- Ford WSS-M2C204-A
- ZF TE-ML 02K
Ravenol Elektro-Hydraulik E-PSF Fluid
RAVENOL J1B1022 Electro-Hydraulic PSF
Ravenol E-PSF Fluid is a fully synthetic electro-hydraulic power steering fluid that meets the MS-11655 material standard. It’s designed for Chrysler, Dodge, and Jeep vehicles with electric-hydraulic power steering systems, as well as Nissan and Toyota vehicles with JTEKT EHS/EHPS systems.
Ravenol engineered this fluid to optimize power transmission and ensure proper functioning across extreme temperature conditions.
The viscosity index of 312 is exceptionally high, meaning the fluid maintains consistent thickness whether you’re dealing with freezing cold or engine bay heat.
The pour point sits at -75°C (-103°F), among the lowest in the category. This means the fluid flows instantly even in arctic conditions. At -40°C, Brookfield viscosity measures 900 mPa·s (or kinematic viscosity of 960 mm²/s), ensuring smooth cold-start operation. Kinematic viscosity at 100°C is 6.1 cSt, while at 40°C it’s 19.0 mm²/s. Flash point reaches 154°C (309°F).
The fluid resists oxidation, prevents foam formation, protects against wear and corrosion, and behaves neutrally with seal materials and non-ferrous metals.
Also compatible with:
- Chrysler MS-11655 (Mopar 68088485AB)
- Nissan 999MPEPSF00P, E-PSF, KLF51-00001
- Toyota 08886-01206, PSF-EH
- Citroën DA 9730 A5, LDS 9979 A3, Hydractive III/III+
- Fiat 9.55550-AG3
- PSA S71 2710
- Renault PSF Klasse 1 (Laguna III)
- MAN M 3289
Why Finding an Alternative to MS-11655 Can Be Confusing
Tracking down a proper MS-11655 equivalent is frustrating, and for good reason.
The most common mistake is assuming ATF+4 works in these systems. It doesn’t.
The confusion often arises because many owners are already familiar with sourcing a Mopar ATF+4 equivalent for their transmission and assume the same fluid applies to the power steering circuit.
Adding to the confusion, some labels display MS.90030 instead of MS-11655, even though MS-11655 is the standard listed in Mopar’s official Vehicle Lubricant & Chemical Catalog.
What Happens When You Use the Wrong Fluid
Using incompatible fluid in an electro-hydraulic steering system creates serious problems.
Mixing different fluid types can severely damage the electric pump and steering rack. Mopar explicitly warns against this.
Conventional petroleum-based fluids don’t meet MS-11655 requirements and will attack the seals in the electro-hydraulic system, causing leaks and eventual failure.
In many cases, an early warning sign of seal failure or system pressure issues is power steering fluid leaking from the reservoir cap, which usually precedes a total pump breakdown.
These systems were designed around synthetic fluid chemistry, and the seal materials reflect that engineering choice.
Beyond seal damage, the wrong fluid causes increased wear, noise (particularly squealing), and steering fade under high temperatures. The system simply doesn’t function correctly when the fluid properties don’t match what the engineers specified.
If your vehicle is under warranty, using an aftermarket fluid that doesn’t explicitly claim MS-11655 compliance creates risk. While the Magnuson-Moss Warranty Act prevents manufacturers from requiring specific brands, dealers will look for reasons to deny claims, and non-compliant fluid is an easy target.
Closing Notes
Electro-hydraulic systems represent a bridge between traditional hydraulics and modern electric powertrains. They demand specific chemistry to handle the intense heat an electric motor generates when it’s sitting directly against hydraulic valves.
Manufacturers market MS-11655 fluids as “lifetime fill,” but that assumes ideal conditions that don’t exist in the real world. Extreme heat, moisture, and stop-and-go driving break down the additive package faster than engineers anticipated when setting those intervals. Keep an eye on your fluid’s appearance. If it shifts from sharp green (or clear amber in some formulations) to murky brown, it’s oxidized and losing its protective edge.
Sticking to the MS-11655 standard means you’re protecting the sophisticated components that keep your steering effortless. Whether you choose the OEM Mopar fluid or a compliant aftermarket equivalent like Pentosin CHF 11S, Febi 06161, or Ravenol E-PSF, what matters is meeting the specification. The fluid is cheaper than the pump replacement.
