Engine Service & Cambelt Intervals by Engine (UK)

Service intervals are set by the engine, not the badge on the boot. Two cars from the same maker in the same year can have completely different answers — a Golf GTI runs a chain that is never scheduled for replacement, while a Golf 1.0 TSI parked beside it runs a belt. The same 1.2 petrol appears as a Peugeot, a Citroën, a DS and a Vauxhall. This section documents that layer: what drives the valves, when it is due, what has changed, and how confident we are in each figure.

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33
Engines covered: 6
Run a wet belt: 8
Transmissions: 33
Brands

Cambelt intervals

Belt, wet belt or chain, and when it's due — across every engine we cover, sortable and citable.

Wet belt engines

Which engines run a belt inside the oil, why they fail, and every interval that has been quietly revised downwards.

Gearbox oil intervals

What the manufacturer schedules, and what the trade does when the manufacturer says “filled for life”.

Engine oil specifications

The manufacturer approval, not just the viscosity — and why that distinction damages engines when it's got wrong.

Engines

21 engines have a page of their own. An engine earns one by having something non-obvious to say — a revised interval, a documented failure mode, real editorial — not by existing. The rest stay as rows.

All engines →

Transmissions

8 gearboxes, keyed to the unit rather than the badge — one DSG record covers five brands, so the interval can’t drift between them.

All transmissions →

Reference data last reviewed August 2026. Every published figure carries its sources on the relevant page; where we haven’t established one, it reads Not established rather than a guess.