Parts for your 2008 Subaru Impreza-Engine oil

2008 Subaru Impreza engine oil

Engine oil is absolutely relevant to the 2008 Subaru Impreza. Subaru’s own technical sources — the 2008 Impreza Owner’s Manual and Subaru scheduled servicing guides — specify engine oil and filter changes as routine maintenance for all petrol (EJ-series) and diesel (EE20) variants.

For this boxer-engined hatch or sedan, engine oil does the heavy lifting: it lubricates moving parts, carries away heat, keeps varnish and sludge in check, and provides a protective film that reduces wear during cold starts. With the horizontally opposed layout, oil control is particularly important to keep everything quiet, smooth and efficient across Aussie and Kiwi conditions.

Subaru’s literature calls for quality oils that meet recognised standards — typically API SM/SN (or later) for petrol engines and low-SAPS ACEA C3-type oils for diesel models with a DPF. In practice, that often means a quality full-synthetic 5W-30 for most uses, with some turbo petrol owners opting for a 5W-40 that still meets Subaru’s specifications. Always match the grade and spec to the exact engine and climate as outlined in the owner’s manual.

As for servicing, most local workshops follow intervals around every 10,000–12,500 kilometres or about six months, whichever comes first. Short trips, lots of idling, towing, dusty roads, or frequent cold starts? Tighten that up — these “severe use” patterns load the oil quickly. Every service should include an oil filter replacement and a fresh sump plug washer to prevent weeps under the bonnet.

Between services, it pays to keep an eye on the dipstick. Check on level ground with a warm engine that’s been off for a few minutes. Top up with the same spec oil if it drops towards the lower mark — many boxers can use a little oil between changes, and Subaru acknowledges this in their manuals. Don’t mix random grades, consistency helps the additive package do its job.

Handy tips for owners in Australia and New Zealand:

• Use the manual’s spec first, choose grade by climate and engine type (NA, turbo, or diesel with DPF).
• Replace the filter at each oil change and inspect for leaks after the first drive.
• If the oil pressure warning light comes on, stop promptly and investigate — running low can be costly.

Popular questions

What oil grade should be used in a 2008 Subaru Impreza in Australia or New Zealand?
Most petrol engines are well served by a quality full-synthetic 5W-30 meeting API SM/SN (or later) and ILSAC requirements, while turbo petrol owners may prefer a 5W-40 that still meets Subaru’s specs. Diesel EE20 models with a DPF generally require a low‑SAPS ACEA C3 5W-30. Always confirm against the owner’s manual for your exact variant and local climate.

How often should the oil be changed?
Plan on every 10,000–12,500 km or about six months. If the Impreza sees short trips, stop‑start traffic, dusty roads, towing or spirited driving, shorten the interval. Replace the oil filter at each change.

What should be done if the oil warning light comes on?
Pull over safely, switch off, and check the dipstick once the engine cools a little. Top up with the correct spec oil if low. If the light stays on or there are unusual noises, don’t drive — arrange a tow and have it inspected.