Parts for your 1989 Mitsubishi Pajero-Oil filter

1989 Mitsubishi Pajero oil filter – what it does and how to look after it

Yes, the 1989 Mitsubishi Pajero definitely uses an engine oil filter. Technical sources including the Mitsubishi Pajero Factory Service Manual (1988–1991), the Haynes Pajero/Montero/Shogun manual for 1983–1996, and AU/NZ parts catalogues from major filter makers all specify a full‑flow, spin‑on oil filter across common 1989 Pajero engines such as the 2.6 petrol (4G54), 2.5 diesel/turbo‑diesel (4D56/4D56T) and 3.0 V6 (6G72). So the oil filter is absolutely relevant to servicing this model.

The oil filter’s job is to catch wear metals, soot, dust and sludge so the engine keeps circulating clean oil and holds good pressure. Inside the canister there’s a fine media, a bypass valve to protect the engine if the media clogs, and (on most good filters) an anti‑drainback valve to help stop dry starts. That anti‑drainback feature is particularly handy on older diesels and V6s where the filter can sit on its side.

For a 1989 Pajero that sees Aussie or Kiwi conditions—dust, towing, short trips or beach runs—changing the filter with every oil change is smart maintenance. Aim for every 5,000–10,000 kilometres or 6–12 months, leaning shorter for turbo‑diesel, off‑road or heavy‑duty use. Use a quality filter that meets OEM spec and the correct oil grade for the engine, sticking with reputable brands helps avoid drainback and pressure issues.

When replacing: warm the engine, drain the oil, and spin off the old filter. Make sure the old rubber gasket hasn’t stuck to the housing. Lightly oil the new filter’s seal, pre‑fill the filter if its orientation allows, then install hand‑tight until the seal contacts, plus about three‑quarters of a turn (or follow the filter’s printed instruction). Refill with the right amount of oil, start up, check for leaks and top up as needed. Dispose of old oil and the filter responsibly at a recycling point.

• Watch for tell‑tales like an oil light flicker, rattly starts, or gritty black oil between services—time to shorten intervals or upgrade filter quality.
• If the vehicle sits for long periods, use a filter with a reliable anti‑drainback valve to reduce dry starts.

Popular questions

What type of oil filter does a 1989 Pajero use?
It uses a full‑flow, spin‑on canister filter. Exact part numbers vary with engine (4G54 petrol, 4D56/4D56T diesel, 6G72 V6), so match the filter to the engine code and build year using a trusted AU/NZ parts catalogue or the workshop manual.

How often should the oil filter be changed on a 1989 Pajero?
Every 5,000–10,000 kilometres or 6–12 months works well. Go shorter if it’s a turbo‑diesel, you tow, do lots of short trips, or drive in dusty conditions.

Can the oil filter be changed without changing the oil?
It’s possible, but not ideal. You’ll lose some oil and may not fix contamination in the sump. Best practice is to replace the filter with the oil so the fresh filter isn’t immediately fed dirty oil.