1st Gen
Mitsubishi Montero (1983–1991)
Maintenance Schedule
8 recurring services keep the 1983–1991 Mitsubishi Montero healthy — starting with oil changes every 3,750 miles. Budget roughly $2,200–3,600 in routine maintenance over 100,000 miles at typical U.S. shop prices.
Applies to model years 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991
Full schedule
Intervals follow the factory maintenance schedule for the 1983-1991 Mitsubishi Montero. Cost ranges are typical U.S. shop prices.
| Service | Interval | Est. cost | Notes |
|---|---|---|---|
| Oil Change | Every 3,750 mi or 6 mo | $35–55 | Engine oil and filter replacement |
| Air Filter | Every 15,000 mi or 12 mo | $20–35 | Engine air filter replacement |
| Tune-up | Every 30,000 mi or 30 mo | $120–200 | Major tune-up with adjustments |
| Brake Fluid | Every 30,000 mi or 2 yr | $50–80 | Brake fluid replacement |
| Transmission Fluid | Every 30,000 mi or 3 yr | $70–120 | Manual or automatic transmission fluid change |
| Transfer Case Fluid | Every 30,000 mi or 3 yr | $60–100 | 4WD transfer case fluid change |
| Differential Service | Every 30,000 mi or 3 yr | $80–130 | Front and rear differential fluid change |
| Coolant Flush | Every 60,000 mi or 5 yr | $70–110 | Cooling system flush and refill |
Common questions
How often should I change the oil on a 1983–1991 Mitsubishi Montero?
Every 3,750 miles or 6 months, whichever comes first. A typical U.S. shop charges $35–55. Engine oil and filter replacement.
How much does it cost to maintain a Mitsubishi Montero (1983–1991)?
Routine maintenance on the 1983–1991 Mitsubishi Montero runs roughly $2,200–3,600 over 100,000 miles at typical U.S. shop prices, spread across 8 recurring services. Independent shops usually land near the low end; dealers near the high end.
What is the most expensive scheduled service on this Montero?
Tune-up at $120–200, due every 30,000 miles. Major tune-up with adjustments.
Cost ranges are estimates for typical U.S. independent shops and dealers; your local prices will vary. Always confirm intervals against your owner's manual — severe driving conditions (towing, short trips, extreme heat or cold) shorten many of them.