Parts for your 1998 Subaru Forester-Oil filter

1998 Subaru Forester Oil Filter

An oil filter is absolutely fitted to every 1998 Subaru Forester. Subaru technical literature confirms it: the Subaru Factory Service Manual for the SF-series (EJ20/EJ25 engines) and the 1998 Owner’s Manual specify an engine oil filter, and Subaru parts catalogues list OEM filters such as 15208AA060 and 15208AA100. Common aftermarket cross-references used in AU/NZ include Ryco Z436, WIX 51365, and Fram PH6607, all matching the Subaru M20 × 1.5 thread and correct gasket size.

On this Forester, the oil filter’s job is to trap grit, metal particles, and sludge so the EJ engine’s bearings, cams and turbo-free breathing stay happy. It also houses key valves: a bypass valve that keeps oil flowing if the media is clogged, and an anti-drainback valve that helps prevent dry starts. A quality filter keeps oil pressure stable, reduces start-up rattle, and extends engine life—especially with stop‑start city driving or dusty gravel work common across Australia and New Zealand.

As part of routine servicing, the oil filter should be replaced at every oil change—typically every 10,000 km or 6 months in local conditions, or sooner if it sees lots of short trips, towing, beach runs, or unsealed roads. Use a reputable brand that meets or exceeds OEM spec. Warm the engine, drain the oil, and always confirm the old rubber gasket comes off with the old filter. Lightly oil the new gasket, spin the filter on until the gasket touches, then tighten a further 3/4 turn by hand (no need to overdo it). After refilling, start the engine, check for leaks, and recheck the level.

• Watch-outs: oil light flicker at idle, noisy cold starts, or oil going black instantly after a change can hint at a tired or incorrect filter.
• Disposal: recycle used oil and filters at council or parts-store collection points—don’t bin them.
• Fitment tip: verify by VIN/engine code (EJ20/EJ25) to ensure the correct height and gasket diameter.

Done right, a fresh, correct-spec filter keeps the 1998 Forester running sweet, protects its internals, and makes every service count.

Popular questions about 1998 Subaru Forester oil filters

Which oil filter fits a 1998 Subaru Forester?
For EJ20 or EJ25 engines, Subaru OEM filters such as 15208AA060 or 15208AA100 fit. In AU/NZ, common equivalents include Ryco Z436, WIX 51365, and Fram PH6607. Always match the M20 × 1.5 thread and correct gasket diameter.

How often should the oil filter be changed?
Replace it with every oil change—about every 10,000 km or 6 months in Australian and New Zealand conditions. If the vehicle does frequent short trips, towing, or dusty driving, shorten the interval.

How tight should the new filter be?
After the gasket first contacts the mounting face, tighten by hand an additional 3/4 turn. Over‑tightening can deform the gasket and cause leaks later.