The 2023 Jeep Gladiator belongs to the JT generation (pre-refresh) (2020-2023), built with 3.6L Pentastar V6, or 3.0L EcoDiesel V6 (2021-2023 only, automatic-only). It takes 0W-20 full synthetic on the Pentastar, 5W-40 full synthetic on the EcoDiesel. Oil changes run 10,000 miles (3.6L) / 8,000 miles (3.0L EcoDiesel). This is the final model year of that generation, usually the most sorted version of the design before the redesign that followed.
A 2023 Jeep Gladiator is 3 years old in 2026, which at an average 12,000 miles a year puts it around 36,000 miles - early ownership. Around 36,000 miles a vehicle is typically past its earliest wear items and into its first real round of scheduled service. Costs are still low at this stage, which makes it the cheapest point to stay ahead of whatever this vehicle's own schedule calls for rather than catch up on it later. On that mileage estimate it is already past its 30,000-mile service, which its own schedule lists as: Replace engine air filter, Inspect drive belt, Inspect coolant condition and hoses.
The fault most worth knowing about on this generation is Manual-transmission clutch pressure plate overheating/fracture (fire risk) - recalled 2020, expanded 2021 and again in 2023. Owners also report Death wobble, a steering oscillation traced to worn track bar and steering components, most complaints logged in 2020; and EcoDiesel high-pressure fuel pump failures reported 2021-2023. None of these are certainties on any individual vehicle - they are the patterns worth checking for when you buy or when a symptom appears.
Track your 2023 Jeep Gladiator service history free with the ServiceSage maintenance tracker, or compare it against other model years on the Jeep Gladiator maintenance schedule hub.
| Interval | Service |
|---|---|
| Every 4,000 mi (severe duty / off-road) | Engine oil & filter change, Rotate tires, Inspect axle vents, skid plates, and undercarriage, Inspect for off-road damage |
| Every 8,000 mi / 12 months (3.0L EcoDiesel) | Engine oil & filter change (5W-40 full synthetic), Replace fuel filter (every other oil change, roughly 16,000 mi), Inspect DEF system and top off as needed |
| Every 10,000 mi / 12 months | Engine oil & filter change (0W-20 3.6L Pentastar), Rotate tires, Inspect brakes, steering, and suspension, Inspect ball joints and track bar |
| Every 20,000 mi | Replace cabin air filter, Inspect brake pads and rotors, Inspect CV joints and driveshafts |
| Every 30,000 mi | Replace engine air filter, Inspect drive belt, Inspect coolant condition and hoses |
| Every 36 months (brake fluid) | Replace brake fluid (DOT 3) |
| Every 100,000 mi | Replace spark plugs (3.6L Pentastar, 6 plugs), Inspect PCV valve, Inspect water pump |
| Every 120,000 mi | Inspect valvetrain |
| Every 150,000 mi | Engine coolant flush (Mopar OAT / HOAT), Inspect entire cooling system |
| First at 20,000 mi, then every 40,000 mi (60,000, 100,000 and 140,000 mi) | Inspect the front and rear axle fluid |
| Every 40,000 mi (severe use: police, taxi, fleet, off-road or frequent trailer towing) | Change the front and rear axle fluid |
| First at 30,000 mi, then every 60,000 mi (90,000 and 150,000 mi) | Inspect the transfer case fluid |
| Every 60,000 mi (severe use: police, taxi, fleet or frequent trailer towing) | Change the transfer case fluid |
| Every 30,000 mi (severe use: towing, snow plowing, heavy loads, commercial or police/taxi use, off-road, desert, or mostly sustained high speed above 90F) | Change the manual transmission fluid |
| Every 20,000 mi (3.0L EcoDiesel) | Inspect the front and rear axle fluid - change it for police, taxi, fleet, off-road or frequent trailer towing |
The table above is indexed by service interval. This is the same schedule indexed by odometer reading, for when you know your mileage and want the list. If your odometer sits between these figures, work back to the last one you passed and catch up anything skipped.
| Odometer | Service due |
|---|---|
| 30,000 mi (48,000 km) | Engine oil & filter change (0W-20 3.6L Pentastar), Rotate tires, Inspect brakes, steering, and suspension, Inspect ball joints and track bar, Replace engine air filter, Inspect drive belt, Inspect coolant condition and hoses. The every-8,000 mi service runs on its own cycle - the nearest fall at 24,000 and 32,000 miles. |
| 60,000 mi (97,000 km) | Engine oil & filter change (0W-20 3.6L Pentastar), Rotate tires, Inspect brakes, steering, and suspension, Inspect ball joints and track bar, Replace cabin air filter, Inspect brake pads and rotors, Inspect CV joints and driveshafts, Inspect the front and rear axle fluid - change it for police, taxi, fleet, off-road or frequent trailer towing, Replace engine air filter, Inspect drive belt, Inspect coolant condition and hoses. The every-8,000 mi service runs on its own cycle - the nearest fall at 56,000 and 64,000 miles. |
| 90,000 mi (145,000 km) | Same as the 30,000 mi service. The every-8,000 mi service runs on its own cycle - the nearest fall at 88,000 and 96,000 miles. |
| 100,000 mi (161,000 km) | Engine oil & filter change (0W-20 3.6L Pentastar), Rotate tires, Inspect brakes, steering, and suspension, Inspect ball joints and track bar, Replace cabin air filter, Inspect brake pads and rotors, Inspect CV joints and driveshafts, Inspect the front and rear axle fluid - change it for police, taxi, fleet, off-road or frequent trailer towing, Replace spark plugs (3.6L Pentastar, 6 plugs), Inspect PCV valve, Inspect water pump. The every-8,000 mi service runs on its own cycle - the nearest fall at 96,000 and 104,000 miles. |
| 120,000 mi (193,000 km) | Engine oil & filter change (5W-40 full synthetic), Replace fuel filter (every other oil change, roughly 16,000 mi), Inspect DEF system and top off as needed, Engine oil & filter change (0W-20 3.6L Pentastar), Rotate tires, Inspect brakes, steering, and suspension, Inspect ball joints and track bar, Replace cabin air filter, Inspect brake pads and rotors, Inspect CV joints and driveshafts, Inspect the front and rear axle fluid - change it for police, taxi, fleet, off-road or frequent trailer towing, Replace engine air filter, Inspect drive belt, Inspect coolant condition and hoses, Inspect valvetrain. |
| 150,000 mi (241,000 km) | Engine oil & filter change (0W-20 3.6L Pentastar), Rotate tires, Inspect brakes, steering, and suspension, Inspect ball joints and track bar, Replace engine air filter, Inspect drive belt, Inspect coolant condition and hoses, Engine coolant flush (Mopar OAT / HOAT), Inspect entire cooling system. The every-8,000 mi service runs on its own cycle - the nearest fall at 144,000 and 152,000 miles. |
| 200,000 mi (322,000 km) | Engine oil & filter change (5W-40 full synthetic), Replace fuel filter (every other oil change, roughly 16,000 mi), Inspect DEF system and top off as needed, Engine oil & filter change (0W-20 3.6L Pentastar), Rotate tires, Inspect brakes, steering, and suspension, Inspect ball joints and track bar, Replace cabin air filter, Inspect brake pads and rotors, Inspect CV joints and driveshafts, Inspect the front and rear axle fluid - change it for police, taxi, fleet, off-road or frequent trailer towing, Replace spark plugs (3.6L Pentastar, 6 plugs), Inspect PCV valve, Inspect water pump. |
| Part | Fitment note | Buy |
|---|---|---|
| Mopar 0W-20 Full Synthetic Motor Oil, MS-6395 (5 qt) | OEM spec for the 3.6L Pentastar V6, every model year | Check price on Amazon |
| Mopar Engine Oil Filter Kit 68191349AC | Fits the 3.6L Pentastar (all years) - the EcoDiesel uses a separate filter | Check price on Amazon Compare oil filter for the 2023 Jeep Gladiator on Amazon |
| Mopar Jeep Engine Air Filter 68257030AA | Fits the 3.6L Pentastar (all years), shared with the JL Wrangler air box | Check price on Amazon Compare engine air filter for the 2023 Jeep Gladiator on Amazon |
| Mopar 68301863AA Cabin Air Filter | Same cabin filter as the JL Wrangler (2018+) - not independently confirmed against a JT-specific catalog | Check price on Amazon |
| Champion 14ZSR15 Spark Plug (set of 6) | 3.6L Pentastar, one per cylinder - carried over from Wrangler/Pentastar fitment, not JT-specific confirmed | Check price on Amazon |
| Mopar 68163849AB 10yr/150k OAT Coolant 50/50 (1 gal) | Use only Mopar OAT purple/violet - do not mix coolant types | Check price on Amazon Compare coolant for the 2023 Jeep Gladiator on Amazon |
| Mopar 8 and 9 Speed ATF | For the ZF 850RE 8-speed automatic - not the manual gearbox | Check price on Amazon Compare automatic transmission fluid for the 2023 Jeep Gladiator on Amazon |
| Mopar 75W-90 GL-5 Manual Transmission/Gear Oil (1 qt) | For the D478 6-speed manual (2020-2024) and the Dana 44 AdvanTEK front/rear axles | Check price on Amazon |
| Chrysler 4318080AD Mopar DOT 3 Brake Fluid (12 oz) | Time-based change every 36 months regardless of mileage | Check price on Amazon Compare DOT 3 brake fluid for the 2023 Jeep Gladiator on Amazon |
Affiliate Disclosure: ServiceSage Auto participates in the Amazon Services LLC Associates Program. We earn a small commission from qualifying purchases at no extra cost to you. This helps us keep our content free and up-to-date.
| Fastener | Torque | Size |
|---|---|---|
| Lug nut | 130 ft-lbs (176 Nm) | 21mm |
Maintenance keeps these away, but when the dash does light up these are the codes this vehicle throws most often - each with what it means and what the repair actually costs.