Vehicle Maintenance Guide
2021 Jeep Wrangler
Sport 4x4 • 3.6L V6 • 8-speed automatic. Maintenance specs, intervals, and recommended products are organized here for fast service planning.
Drive Type
4x4
Body Style
SUV
Engine
3.6L V6
Maintenance Spec Table
| Maintenance Item | Capacity | Viscosity / Spec | Interval |
|---|---|---|---|
Engine Oil Engine Oil & Lubrication | 5.00 quarts | 0W-20 MS-6395 | Normal: 10,000 mi / 12 mo Severe: 5,000 mi / 6 mo |
Rear Differential Fluid Drivetrain Fluids | Check procedure | 75W-90 Synthetic gear lubricant meeting axle requirements | Normal: 60,000 mi Severe: 30,000 mi |
Transfer Case Fluid Drivetrain Fluids | Check procedure | See spec ATF+4 | Normal: 60,000 mi Severe: 30,000 mi |
Procedure Notes
Engine Oil
Short-trip and off-road usage justify tighter service timing.
Rear Differential Fluid
Procedure guidance to be expanded in the next content pass.
Transfer Case Fluid
Mud, water, and trail use justify earlier fluid replacement.
Recommended Products
Ultra Platinum Full Synthetic
engine oil
Pennzoil • engine-oil • 0W-20
Fit: Matches the factory 0W-20 viscosity requirement and lines up with the listed MS-6395 spec.
Why we like it: Straightforward fit for the Pentastar under mixed daily and trail use.
SEVERE GEAR Synthetic EP Gear Lube 75W-90
rear differential fluid
AMSOIL • gear-oil • 75W-90
Fit: Matches the required 75W-90 differential-fluid viscosity and meets API GL-5.
Why we like it: Uses AMSOIL’s severe-duty gear-oil line.
Compatibility: Use in differentials that require API GL-5/MT-1, MIL-PRF-2105E, or MACK GO-J performance.
OE Synthetic Automatic Transmission Fluid Multi-Vehicle
transfer case fluid
AMSOIL • transmission-fluid
Fit: Fits the transfer-case fluid requirement by matching the required ATF+4 specification.
Compatibility: Use in applications that require Allison C-4, TES-389 • Chrysler ATF+4 • Ford MERCON, MERCON V • GM DEXRON II, DEXRON III • Honda/Acura ATF-Z1 • Hyundai/Kia SP-II, SP-III • JWS 3309, 3314, 3317 • Mazda ATF-M III, ATF-MV • Mitsubishi SP-II, SP-III • Nissan Matic-D, Matic-J, Matic-K • Subaru ATF, ATF-HP • Toyota Type T, T-II, T-III, T-IV
Signature Series Synthetic Motor Oil 0W-20
engine oil
AMSOIL • engine-oil • 0W-20
Fit: Matches the factory 0W-20 viscosity requirement and meets the required Chrysler MS-6395 spec.
Why we like it: Uses AMSOIL’s flagship engine-oil family.
Compatibility: Use in vehicles that require API SP (Resource Conserving), ILSAC GF-6A, GM dexos1 Gen 3, Chrysler MS-6395, or Ford WSS-M2C947-A, WSS-M2C947-B1, and WSS-M2C962-A1.
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