2015 Jeep Grand Cherokee Fluid Specs: The Complete Guide

As an ASE-certified master technician, one of the most common mistakes I see in the shop involves incorrect fluid usage. The 2015 Jeep Grand Cherokee is a prime example of a vehicle where fluid engineering underwent significant changes from previous generations. Whether you are running the trusty 3.6L Pentastar V6, the muscular 5.7L or 6.4L Hemi V8s, or the torquey 3.0L EcoDiesel V6, using the exact factory-specified fluid is vital to the longevity of your drivetrain.

Below is the definitive fluid specification guide for the 2015 Jeep Grand Cherokee, featuring Mopar specifications, capacities, and crucial maintenance warnings.

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil (3.6L V6)	5W-20 API Certified (Mopar MS-6395)	6.0 qts (5.6L)
Engine Oil (5.7L V8)	5W-20 API Certified (Mopar MS-6395)	7.0 qts (6.6L)
Engine Oil (6.4L V8 SRT)	0W-40 Full Synthetic (Mopar MS-12633)	7.0 qts (6.6L)
Engine Oil (3.0L Diesel)	5W-40 Synthetic ACEA C3 (Mopar MS-10902)	8.0 qts (7.5L)
Engine Coolant	OAT 10-Year/150k-mile (Mopar MS-12106), Purple	10.4 - 15.2 qts (varies by engine)
Transmission Fluid	Mopar ZF 8 & 9 Speed ATF / ZF Lifeguard 8	~9.0 qts (dry fill, verify in manual)
Transfer Case	Mopar ATF+4 (MS-9602)	1.0 - 2.0 qts (varies by 4WD system)
Front Differential	75W-85 GL-5 Synthetic Gear Lubricant	1.2 qts (1.1L)
Rear Differential	75W-85 GL-5 Synthetic (Add friction modifier for ELSD)	1.2 - 1.4 qts (1.1 - 1.3L)
Brake Fluid	DOT 3 (Mopar MS-4574)	Fill to MAX line
Power Steering Fluid	EPS (No fluid) / SRT: Mopar Hydraulic MS-11655	Fill to MAX line (SRT only)
Washer Fluid	Any quality washer solvent	~1.0 gallon
Diesel Exhaust Fluid	API Certified ISO 22241 (EcoDiesel only)	8.0 gallons (30.2L)

Note: Capacities are approximate dry-fill measurements. Always check the dipstick or fill-hole level after servicing.

Engine Oil

Oil specifications for the 2015 Grand Cherokee vary wildly depending on the powerplant under the hood. For the 3.6L V6 and 5.7L V8, Chrysler specifies 5W-20 engine oil that meets Mopar MS-6395 and current API (SP/SN) standards. The high-performance 6.4L SRT Hemi requires a robust 0W-40 full synthetic meeting MS-12633. For the 3.0L EcoDiesel, you must use a 5W-40 low-ash synthetic meeting Mopar MS-10902 or ACEA C3 to prevent plugging the Diesel Particulate Filter (DPF).

Intervals and Pitfalls: Follow the dashboard Oil Life Monitor. Do not stretch oil changes beyond 10,000 miles (or 12 months), and check your oil levels regularly. The Hemis in particular can suffer from lifter tick if run low on oil. EcoDiesel owners must strictly adhere to the low-ash spec.

Engine Coolant

This is where DIYers frequently make catastrophic mistakes. For the 2015 model year, FCA (Chrysler) transitioned entirely to Organic Additive Technology (OAT) coolant. This factory fluid is typically purple (Mopar MS-12106).

Intervals and Pitfalls: Never, under any circumstances, mix this OAT coolant with the older pink/orange HOAT (Hybrid Organic Additive Technology) coolant used in 2012 and older Jeeps. Mixing the two will create a sludgy, gel-like substance that will clog your heater core and radiator, leading to massive overheating damage. Change the OAT coolant every 10 years or 150,000 miles.

Transmission Fluid

Gone are the days of the 5-speed automatic taking ATF+4. The 2015 Grand Cherokee utilizes the brilliant ZF 8-speed automatic transmission (either the 845RE or 8HP70). This transmission strictly requires Mopar ZF 8 & 9 Speed ATF, or the direct equivalent ZF LifeguardFluid 8.

Intervals and Pitfalls: Never pour ATF+4, Dexron, or a "Universal Multi-Vehicle" fluid into this transmission. Doing so will severely damage the mechatronic unit and clutch packs. While Chrysler claims it is a "lifetime" fluid, ASE technicians and ZF themselves recommend a fluid and pan/filter replacement every 60,000 miles for maximum longevity.

Transfer Case

The 2015 Grand Cherokee offers a few different four-wheel-drive systems (Quadra-Trac I, Quadra-Trac II, and Quadra-Drive II). Thankfully, the fluid specification is standardized across the board: Mopar ATF+4 (MS-9602).

Intervals and Pitfalls: Replace the transfer case fluid every 60,000 miles (or 30k miles if you tow frequently). ATF+4 is highly specific; do not substitute it with Dexron or Mercon variants.

Front and Rear Differentials

Both the front and rear axles require 75W-85 GL-5 synthetic gear lubricant.

Intervals and Pitfalls: If your Grand Cherokee is equipped with Quadra-Drive II (which includes an Electronic Limited Slip Differential or ELSD in the rear) or if you drive an SRT, you must add Mopar Friction Modifier (MS-10111) to the rear differential to prevent clutch chatter. Gear oil should be inspected every 30,000 miles and changed every 40,000 to 60,000 miles, or more frequently if you drive through deep water or tow heavy loads.

Brake Fluid

The hydraulic braking system takes standard DOT 3 brake fluid meeting Mopar MS-4574. DOT 4 can be used if a complete system flush is performed, but strictly adhere to DOT 3 for top-offs to prevent seal swelling or boiling point degradation.

Intervals and Pitfalls: Brake fluid is hygroscopic (absorbs moisture from the air). Flush the brake system every 2 to 3 years to prevent internal rust, ABS module failure, and a spongy pedal.

Power Steering Fluid

Most 2015 Grand Cherokee models (3.6L, 5.7L, 3.0L) are equipped with Electric Power Steering (EPS), meaning there is no power steering pump or fluid to check. However, the 6.4L SRT model retains a hydraulic/electro-hydraulic power steering setup. For the SRT, you must use Mopar Hydraulic System Power Steering Fluid (MS-11655 / MS-10838). Do not use standard ATF in the SRT power steering system.

Washer Fluid and DEF

Washer Fluid: Any quality, seasonally appropriate windshield washer solvent will do. If you live in a cold climate, ensure the fluid contains a de-icer rated for sub-zero temperatures. DEF (Diesel Exhaust Fluid): For EcoDiesel owners, maintaining your DEF system is mandatory. Use only API Certified DEF meeting ISO 22241 standards. The DEF tank holds roughly 8 gallons. Do not overfill, and ensure dirt does not enter the filler neck, as the DEF injector is highly sensitive to contamination.

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