2027 Jeep Gladiator Service
Oil changes on the indicator and never past 7,500 miles or 12 months, with every milestone service from the owner's manual.
Quick Answer
The 2027 Gladiator tells you when it needs service: the oil change indicator comes on, and the truck is due within the next 500 miles. A Gladiator serviced on schedule holds up to the work Jeep built it for, whether that is towing a boat to the ramp, carrying a load in the bed or driving a New Hampshire winter on salted roads, and the 3.6L V6 and 8-speed automatic carry over from 2026.
The service department at Jeep Portsmouth works on Jeeps all day, and the 2027 Gladiator schedule below comes straight from the owner's manual that ships with the truck. Schedule service online or call the team.
The 2027 Gladiator follows an oil-change-indicator schedule, with additional services at mileage milestones. Whichever comes first, the mileage or the time, sets the service date.
Each time the oil change indicator comes on, the service covers a short list of checks: change the oil and filter, rotate the tires, inspect the 12-volt battery and clean and tighten the terminals, inspect the CV and universal joints, inspect the brake pads, rotors, hoses and parking brake, inspect the cooling system hoses, inspect the exhaust system, and inspect all door latches for grease. If the truck sees dust or off-road use, the engine air filter gets inspected as well. Twice a year, white lithium grease on the door hinge joints keeps the quick-release hinges moving smoothly.
| Service | When it is due |
|---|---|
| Brake lining inspection, suspension and tie rod inspection, parking brake adjustment | Every 20,000 miles |
| Front and rear axle fluid inspection | 20,000, 60,000, 100,000 and 140,000 miles |
| Transfer case fluid inspection | 30,000, 90,000 and 150,000 miles |
| Engine air filter replacement | 30,000, 60,000, 90,000, 120,000 and 150,000 miles |
| Cabin air filter replacement | Every 12,000 miles |
| Spark plug replacement | 100,000 miles |
| PCV valve inspection and replacement if necessary | 100,000 miles |
| Engine coolant flush and replacement | 100,000 miles (10 years) and 150,000 miles |
| Accessory drive belt, tensioner and pulley inspection | 150,000 miles |
Once a month or before a long trip, the owner's manual also lists checking the engine oil level, the lights, the battery terminals, the brakes, the steering and suspension, the wipers and washer fluid, the tire pressure and the cooling system reservoir.
The Gladiator's oil change indicator sets the interval, and no oil change should go past 7,500 miles, 12 months or 350 hours of engine run time, whichever comes first. Frequent short trips, towing a trailer, and extreme heat or cold all bring the indicator on sooner.
| Item | Specification |
|---|---|
| Oil type | Mopar SAE 0W-20 full synthetic, or SAE 5W-20, meeting MS-6395 |
| Oil capacity with filter | 5 quarts |
| Indicator message | "Oil Change Required" (cluster display) or "Change Oil" flashing in the odometer |
| Time to service after the message | Within the next 500 miles |
| Tire rotation | At every oil change, and at the first sign of irregular wear |
An authorized dealer resets the indicator after the oil change. Jeep Portsmouth handles that along with the tire rotation, so the visit leaves the truck ready for the next interval.
The big services come at 30,000, 60,000 and 100,000 miles. The 30,000-mile visit adds the engine air filter and a transfer case fluid inspection, and the 60,000-mile visit adds the engine air filter and an axle fluid inspection. At 100,000 miles the spark plugs are replaced, the PCV valve is inspected and the first coolant service is due, so plan for a longer visit at that mark. The automatic transmission uses a factory fill that lasts the life of the vehicle under normal driving, with a fluid and filter change only if the fluid is contaminated.
Beyond the schedule, a few items give the Gladiator its everyday upkeep.
Rotating the tires at every oil change keeps the wear even across a set of all-terrain tires, which matters on a truck that tows and hauls. Brake linings get inspected every 20,000 miles and the parking brake is adjusted at the same interval.
The manual specifies Mopar ZF 8 & 9 Speed ATF for the automatic transmission, Mopar ATF+4 for the transfer case, Mopar SAE 75W85 gear and axle lubricant for the front and rear axles, and an OAT coolant that meets Jeep's MS.90032 standard. Brake fluid is Mopar DOT 3.
Towing a trailer often, driving off road or running the truck as a work vehicle calls for the tough-duty schedule: the front and rear axle fluid is changed at 40,000, 80,000 and 120,000 miles, and the transfer case fluid at 60,000 and 120,000 miles when the truck tows frequently.
The Gladiator is built to take heavy use, and the schedule above is how it stays that way. Dana 44 axles front and rear and skid plates under the fuel tank, transmission and transfer case give the platform its durability. Coastal New Hampshire adds its own conditions, from the back roads into Exeter to the four-lane highway up to Rochester: road salt from roughly November through March, salt air all year, and a freeze-thaw season that opens potholes by late winter. A rinse under the truck after a salted drive, and a suspension and tire check each spring, keep a Seacoast Gladiator in shape. Jeep builds the Gladiator in Toledo, Ohio, with a United States engine and transmission, and backs it with a 5-year/60,000-mile powertrain warranty and 5-year corrosion coverage.
| Coverage | Term |
|---|---|
| Basic limited warranty | 3 years / 36,000 miles |
| Powertrain limited warranty | 5 years / 60,000 miles |
| Corrosion perforation | 5 years / unlimited miles |
| Roadside assistance | 5 years / 60,000 miles |
Upkeep on a 2027 Gladiator is modest because the schedule runs on the indicator, not a calendar. Oil changes come when the truck says so, spark plugs wait until 100,000 miles, and the automatic transmission needs no scheduled fluid service. FlexCare Vehicle Protection plans are available through the dealer, and the service team can build a plan around how you use the truck.
| If you mostly | Plan for |
|---|---|
| Commute on I-95 and Route 1 | Oil changes on the indicator, with tire rotation at each visit |
| Tow a boat or camper regularly | The tough-duty schedule for axle and transfer case fluid, plus trailer-brake checks before each season |
| Drive off road or on frost-heaved back roads | An annual suspension, tire and skid plate check |
The service department at Jeep Portsmouth, in Portsmouth, works on Jeeps only and uses genuine Mopar parts. Drivers from Exeter, Dover, Somersworth, Stratham, Newmarket and Durham schedule service online, visit the Mopar Express Lane, or browse the service center page for the full list of services. Current offers are on the service specials page. Looking for the previous model year? See the 2026 Gladiator maintenance schedule.
When the oil change indicator comes on, within the next 500 miles, and never past 7,500 miles, 12 months or 350 engine hours, whichever comes first.
Mopar SAE 0W-20 full synthetic or SAE 5W-20 oil that meets Jeep's MS-6395 standard, 5 quarts with the filter.
At every oil change, and at the first sign of irregular wear even if the oil indicator has not come on.
At 100,000 miles. The interval is based on mileage only.
Every 12,000 miles.
Not on a schedule. The factory fill lasts the life of the vehicle under normal driving, and the fluid and filter are changed only if the fluid becomes contaminated or the transmission is opened.
The tough-duty schedule applies: front and rear axle fluid at 40,000, 80,000 and 120,000 miles, and transfer case fluid at 60,000 and 120,000 miles.
Online through the service scheduler or by calling Jeep Portsmouth, and the team will line up the right visit for your mileage.
A 3-year/36,000-mile basic warranty, a 5-year/60,000-mile powertrain warranty, 5-year corrosion coverage and 5-year/60,000-mile roadside assistance.
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