Peugeot 308 Oil Type: Complete Engine Oil Guide for UK Drivers

The correct Peugeot 308 oil type is a fully synthetic engine oil with an SAE viscosity grade of 0W-20, 0W-30, or 5W-30, depending on the engine. For most Mk2 models built between 2013 and 2021, Peugeot specifies oil meeting proprietary standards. Notably, petrol variants such as the 1.2 PureTech now generally require a 0W-20 meeting PSA B71 2010 to protect internal components, while diesel variants like the 1.6 BlueHDi typically require a 0W-30 meeting PSA B71 2312. Always confirm the specification against your engine code in the owner's handbook before you purchase.

The Peugeot 308 has been one of the UK's most popular family hatchbacks since its launch in 2007, available in hatchback, SW estate, and CC body styles. Engine oil changes are the most frequent maintenance task for any vehicle, and it is particularly important to get it right on the 308 due to its wet belt design. Several 308 engines have a timing belt that runs directly in engine oil, so using the wrong or degraded oil can cause the belt to wear out and lead to costly engine damage.

This guide covers everything a UK driver needs to know: the correct engine oil for each variant, how many litres your model takes, how to read a product label, and which brands to find at a good price.

Which engine oil does the Peugeot 308 take?

The peugeot 308 engine oil specification varies by engine code, fuel type, and year of manufacture. As a general rule, every post-2013 (Mk2) 308 requires a low-SAPS (low-sulphated ash, phosphorus, and sulphur) fully synthetic oil. This is an essential requirement for engines equipped with a diesel particulate filter (DPF), SCR catalytic converter, or both, as using a conventional high-SAPS oil will coat these systems in ash deposits over time and cause costly repairs.

The table below covers popular engine variants on sale in the UK, including recent manufacturer updates to mitigate known engine issues. Oil capacity figures are service-fill values including the oil filter. Always use the dipstick to verify the final level after every oil change.

The capacity litre values above are based on a completely drained oil reservoir and an oil change with a filter replacement. On the 308's 1.2 PureTech, the 3.5-litre figure is consistent across manual and automatic gearbox variants. If you are ordering from autodoc.co.uk, entering your vehicle's registration number in the oil selector will help to narrow down the exact range compatible with your car. However, you should still check the oil type specified in your car owner’s manual.

Understanding the PSA B71 specification

PSA (Peugeot Société Anonyme) introduced its own proprietary oil standards in 2009, and understanding them is the key to selecting the right engine oil for a Peugeot 308. These standards go beyond the familiar ACEA and API classifications and define additional performance tests developed specifically around PSA's engine technology.

For the 308, the specifications you will encounter most often are PSA B71 2290, PSA B71 2312, and the newer B71 2010. The B71 2290 standard is based on ACEA C2 or ACEA C3 and applies primarily to Euro 5 diesel engines fitted with a DPF. It requires a low-SAPS formulation to protect the filter from premature ash loading. The B71 2312 is a more demanding standard developed for BlueHDi diesel engines with SCR systems; it specifies mid-SAPS chemistry and mandates improved cold-flow properties that reduce hydrodynamic friction during cold starts.

More recently, Stellantis heavily pushed the PSA B71 2010 standard (a 0W-20 grade). This was introduced specifically to combat premature timing belt degradation in the 1.2 PureTech engines, offering a formulation that is less chemically aggressive to the belt material.

Car oil viscosity classification explained

The SAE (Society of Automotive Engineers) car oil viscosity classification is the global system used by every engine manufacturer to describe how freely a lubricant flows at different temperatures. For a grade such as 5W-30 or 0W-30, the number before the "W" (winter) defines the lubricant’s performance at low temperatures, while the number after it describes its thickness at an operating temperature of 100°C.

A lower cold-temperature number (e.g. 0W instead of 5W) means that the oil reaches bearing surfaces faster during start-up because it runs thinner. An oil that is too thick may not flow easily enough and cause unnecessary strain, whereas an oil that is too thin will not adequately protect the moving metal parts. This is why you must stick to the manufacturer’s recommendations.

A fully synthetic base oil – rather than a semi-synthetic or mineral product – is required across the entire Peugeot 308 range. Fully synthetic oils maintain their viscosity across a wider temperature range, resist thermal degradation between service intervals, and contain the specific additive chemistry required by the PSA B71 standards.

API and ACEA ratings on the oil cannister

Beyond the PSA B71 classification, every oil canister carries API and ACEA ratings. For petrol-engined 308 models, look for API SN manufacturer recommendations as a minimum; the most current formulations carry API SP, which include improved protection against low-speed pre-ignition (LSPI) in turbocharged direct-injection petrol engines.

For diesel applications, ACEA C-series classifications are far more relevant for any 308 diesel sold in Europe. The ACEA C2 and C3 designations specifically address low-SAPS requirements for engines with modern emission controls, making them the appropriate ratings to seek out for oil for peugeot 308 diesel variants.

Many oils that meet PSA specifications also carry cross-manufacturer approvals, such as MB 229.61 or VW 504 00/507 00. These cross-approvals are a useful indicator of a high-quality formulation, though they are supplementary to – not a substitute for – the specific PSA approval your 308 requires.

How often should the oil be changed in a Peugeot 308?

Peugeot recommends an oil change after roughly every 15,000 km (approximately 9,300 miles) or every 12 months, whichever comes first. In practice, many UK independent specialists advise sticking to the annual interval regardless of mileage, particularly for drivers who cover shorter distances or operate mainly in urban stop-start conditions. Short trips prevent the engine from reaching full operating temperature, which accelerates oil degradation even when mileage is low.

For 1.2 PureTech owners, it is highly advisable not to wait the full interval between dipstick checks. Peugeot considers oil consumption of up to 0.5 litres per 1,000 km acceptable in this engine, which means you may find that the level is noticeably lower well before the service reminder activates.

Always replace the oil filter during every oil change. An old filter that is full of contaminants will circulate degraded oil back through a freshly serviced engine.

How to check & top up engine oil on the Peugeot 308

Checking the engine oil level is a routine task that any driver can carry out at home.

1.  

   Park the vehicle on level ground and switch off the engine. Wait at least five minutes for the oil to drain back down into the sump.

    

2.  

   Open the bonnet using the release lever below the dashboard, then release the secondary catch.

    

3.  

   Locate the dipstick – on most 308 engines it has a yellow or orange loop handle. Pull it out and wipe it clean with a lint-free cloth.

    

4.  

   Reinsert the dipstick fully, then withdraw it once more. Read the level against the MIN and MAX marks.

    

5.  

   If the level is low, remove the filler cap and add no more than 0.5 litre at a time.

    

6.  

   Wait a minute, then check again with the dipstick. Repeat until the level reaches between the midpoint and MAX mark. Do not overfill the reservoir.

    

7.  

   Screw on the filler cap securely and close the bonnet.

    

When topping up between services, always use oil with the same grade and PSA-approved specification as the one recommended by the car manufacturer.

What happens if you use the wrong oil?

The peugeot 308 diesel oil type and petrol oil type are specific for good reason. Using a high-SAPS oil in any 308 diesel will deposit excess ash inside the diesel particulate filter. DPF regeneration cycles become increasingly frequent, fuel economy worsens, and eventually, the DPF warning light illuminates. A replacement DPF unit can cost at least £500 or more.

For the 1.2 PureTech petrol engine, the stakes are also high. The timing belt runs in engine oil, and using an oil with unsuitable additives will cause the belt to swell, crack, and shed debris into the system. This leads to a loss of oil pressure and premature engine failure. Similarly, for the 1.5 BlueHDi, using a lubricant that is too thin has been linked to timing chain wear and snapping. Always stick to the latest manufacturer-issued oil standards.

Best engine oil brands for the Peugeot 308

Several top manufacturers produce oils with the requisite PSA B71 approvals.

• TotalEnergies: the brand most closely associated with PSA vehicles. The TotalEnergies Quartz Ineo First 0W-30 is the reference product for older B71 2312 specs, while their Quartz Ineo Xtra Dynamics 0W-20 covers the newer B71 2010 requirement.
• Shell: the Shell Helix Ultra Pro AP-L 0W-30: PSA B71 2312 complies with the PSA B71 2312 standards, making it a highly versatile product readily available at autodoc.co.uk.
• Mobil: the Mobil Super 3000 Formula P series offers products formulated specifically for Peugeot and Citroen vehicles across both petrol and diesel platforms.
• ELF & Motul: both French brands offer dedicated PSA products, such as the ELF Evolution Full-Tech PCX and Motul Specific ranges.

When purchasing from an online retailer, you should enter your registration number to find an exact match for your model year. Always make sure to cross-reference the suggested product with the required PSA B71 code for your engine.

Common oil-related problems in the Peugeot 308

Higher-than-expected oil consumption is a well-documented characteristic of the 1.2 PureTech engine. Peugeot states that up to 0.5 litres per 1,000 km falls within normal parameters. The implication is clear: check the level regularly and keep a spare oil container in the boot.

On the 308 SW and hatchback 1.6 HDi Mk1 models, worn valve stem seals produce a characteristic puff of blue smoke upon start-up. If left unaddressed, the catalytic converter may be damaged over time.

Finally, if you notice the oil pressure warning light illuminate on the dashboard while driving, stop the engine immediately. On the 1.2 PureTech, this is often the first sign that timing belt fragments have blocked the oil strainer.

Frequently Asked Questions (FAQ)