Sedan owners Nissan Almera new generation (G15 body) are often faced with a dilemma when choosing lubricants for their car. Engine H4M, which is the result of a joint development between Renault and Nissan, requires a special approach to maintenance. The wrong choice of fluid can lead to a decrease in the life of the turbocharger (if there is one) or to accelerated wear of the piston group.
Many car owners rely on advice from friends or advertising without reading technical documentation. This is a mistake because H4M is a high-tech unit with phase shifters that is sensitive to the quality of the lubricant. In this article, we will analyze the official requirements of the manufacturer, select the optimal viscosity for different climate zones, and consider popular brands that are really suitable for your car.
Official approvals and manufacturer specifications
The main criterion when selecting a lubricant is compliance with the specifications approved by the technical department of the concern. For engine H4M (and its modifications K4M in older versions) clearance is critical Renault RN0720 or RN0710. It is these codes that indicate that the fluid has passed all the necessary laboratory tests for compatibility with seal materials and catalyst.
If you do not find the markings on the canister RN0720, it is better to refrain from purchasing, even if the product is positioned as “universal”. Series engines H4M equipped with a variable valve timing system that operates on oil pressure. Cheap analogues may not provide the required pressure at low temperatures, which will lead to a delay in the response of the phase shifters and the appearance of noise.
In addition, the manufacturer recommends using oils of the category ACEA C4 or ACEA C3. These are low-ash lubricants that do not clog particulate filters (although there are none on naturally aspirated engines) and extend the life of the catalytic converter. Ignoring this requirement can lead to expensive repairs to the exhaust system already after a mileage of about 100,000 km.
⚠️ Attention: Use of approved oils API SL/SM or outdated standards is strictly prohibited for H4M. Such lubricants contain too much phosphorus and sulfur, which instantly damages the oxygen sensors and catalyst, and also causes coking of the oil scraper rings.
Selection of viscosity depending on climatic conditions
An oil's viscosity is its ability to flow at a certain temperature. For Nissan Almera G15 The manufacturer indicates several options in the technical documentation, but the most preferable is 5W-30. This index provides easy starting in winter and reliable film protection in summer. However, in harsh operating conditions the choice may change.
If you live in a region with extremely cold winters, where temperatures consistently stay below -25°C, you may want to consider 0W-20 or 0W-30. Thinner oil is pumped through the system faster during cold starts, protecting camshaft and turbine bearings in the first seconds of operation. For summer use in hot southern regions it is acceptable to use 5W-40, which creates a thicker protective film under high loads.
It is important to understand that switching to a thicker oil (for example, 10W-40) unless absolutely necessary, can lead to an increase in fuel consumption and a decrease in acceleration dynamics. Electronic control unit ECU calculates injection parameters based on the resistance of moving parts, and excess oil resistance upsets this balance.
- ❄️ 0W-20 / 0W-30 - ideal for harsh winters and short trips with frequent cold starts.
- 🌡️ 5W-30 — the optimal “gold standard” for most regions of Russia and the CIS.
- 🔥 5W-40 — recommended for engines with a mileage of more than 150,000 km or for active driving in the heat.
Refueling volume and oil change frequency
Engine H4M has a crankcase volume that requires precise calculation of the amount of fluid. When changing the oil and filter, it is necessary to fill it exactly 4.8 liters. This is an important nuance, since most canisters are sold in 4 liter and 1 liter packaging. You will need one large canister and one small, or two 4 liters each (the remainder will be used for refilling). Overfilling or underfilling can be fatal to the engine.
The official maintenance regulations require changing the lubricant every 15,000 km or once a year. However, this interval is calculated for ideal operating conditions, which do not exist in real city traffic. In traffic jams, short trips and poor fuel, oil degrades faster. Therefore, expert mechanics strongly recommend reducing the interval to 7,000 – 10,000 km.
When operating in difficult conditions (dirt, dust, towing a trailer), the replacement frequency should be increased even more. The synthetic base loses its cleaning properties and oxidizes, turning into an aggressive environment that corrodes the seals. Regular changes are the cheapest way to prolong life H4M.
- up to 50,000 km
- from 50,000 to 100,000 km
- from 100,000 to 150,000 km
- more than 150,000 km
Popular brands and original products
There are many oils on the market that meet the tolerances RN0720. Official partner Nissan and Renault is a brand Elf Evolution. This is what can most often be seen on the shelves of dealership centers. Products in this line, for example Elf Evolution Full-Tech FE 5W-30, fully complies with the plant’s requirements and ensures stable viscosity values throughout the entire interval.
In addition to the original, many owners successfully use premium products from Shell Helix Ultra, Mobil 1 or Liqui Moly. The main condition is that the canister has the required approval. For example, Shell Helix Ultra ECT C3 5W-30 also suitable for H4M, as it has the appropriate certificates. Don’t be afraid to experiment with brands if they are certified, but avoid “no-name” manufacturers.
Particular attention should be paid to fakes. The counterfeit market is oversaturated, and distinguishing the original from the fake is not always easy. Buy consumables only from official distributors or large chain stores that require receipts and documents for the shipment of goods. The risk of pouring fuel into the engine is too great.
| Brand | Oil model | Viscosity | Tolerance |
|---|---|---|---|
| Elf | Evolution Full-Tech FE | 5W-30 | RN0720, ACEA C4 |
| Shell | Helix Ultra ECT C3 | 5W-30 | RN0720, ACEA C3 |
| Liqui Moly | Top Tec 4200 | 5W-30 | RN0720, ACEA C3 |
| Mobil | Super 3000 X1 | 5W-30 | RN0720, ACEA C4 |
Self-oil change procedure
Changing the oil is a procedure that you can perform yourself, saving on service costs. First, you need to warm up the engine to operating temperature so that the old oil drains faster and washes out sediment. The car is then placed on a pit or overpass, and the oil pan is cleared of dirt before unscrewing the plug.
The most crucial moment is replacing the oil filter. On the engine H4M A cartridge-type filter is used, which is inserted into a plastic housing. The new element must have an O-ring. The old ring is removed and the new one is lubricated with fresh oil before installation. This will prevent misalignment and leakage.
⚠️ Attention: When tightening the oil filter cap, do not use a torque wrench with excessive force. The plastic housing may crack, causing oil loss under load. Tighten until you feel it stop, then turn 3/4 turn.
☑️ Preparing for an oil change
After draining the old oil and installing the new filter, screw in the drain plug with a new copper O-ring. Pour new oil through the filler neck using a funnel. Do not pour in the entire volume at once, fill in about 4.5 liters, then start the engine for 1-2 minutes, turn it off and wait 5-10 minutes for the oil to drain into the sump.
Now check the level with a dipstick. It should be between the marks MIN and MAX. It is better to keep the level a little closer to the maximum, but not exceed it. If the level is low, add the remainder. If you overfill, be sure to remove the excess using a syringe or drain plug, as overfilling causes foaming and a drop in oil pressure.
Common mistakes when replacing
If you do not replace the filter O-ring, it may remain in the housing and push out the cover when the motor is running. If you do not warm up the oil, up to 0.5 liters of the old composition will remain in the pan, which will worsen the properties of the new one.
Features of operation and signs of the need for replacement
Even if the regulations are followed, the engine may require an unscheduled oil change. Monitor the color and consistency of the liquid on the dipstick. If the oil turns black like oil and loses its clarity already after 3,000 km, this is a signal of poor fuel quality or problems with the crankcase ventilation (PCV) system.
Another warning sign is the appearance of metal shavings or foam in the oil. Foam indicates that the additives have been destroyed, or antifreeze has entered the system (burnout of the cylinder head gasket). In such cases, you need to immediately turn off the engine and carry out diagnostics. For H4M Problems with the phase change system are typical, and low quality oil can cause their breakdown.
It is also worth paying attention to oil consumption. The norm for this engine is up to 0.5 liters per 10,000 km. If you add a liter every 2-3 thousand, this is a sign of wear on the oil scraper rings or stuck piston rings. Using thicker oil (5W-40) may temporarily reduce consumption, but will not solve the problem of mechanical wear.
Regularly checking the oil level once a week is a must-have habit for the owner. Nissan Almera G15, allowing you to avoid fatal engine breakdowns.
Answers to frequently asked questions from owners
Is it possible to mix different brands of oils?
Mixing oils from different manufacturers and types is strictly not recommended. Different additive packages can enter into a chemical reaction, which will lead to sedimentation and loss of protective properties. If you are forced to add another oil in an emergency, carry out a complete change as soon as possible.
Which oil filter is better to choose?
Original filter Nissan (Part No. 15208-65F0A) is the best choice because its backflow valve is precisely tuned to the specifications H4M. Also suitable are high-quality analogues from Mann-Filter (W712/94) and Cofle. Cheap Chinese filters often have low-quality paper and weak springs.
How often should you change your air filter?
The air filter affects engine performance and fuel consumption. It should be changed every 15,000 km or at every second service. In dusty conditions (dirt roads), it is better to replace it more often, every 7,000 - 10,000 km, to avoid dust getting into the cylinders.
Do I need to flush the engine before changing the oil?
When regularly replacing high-quality oil, flushing is not necessary and is even harmful, since aggressive solvents can wash away the protective film and damage the seals. Flushing is only necessary if the engine is filled with unknown oil, or if there is a major transition from mineral oil to synthetic oil on an old engine.
Why is the oil pressure light on?
The oil pressure light may come on due to a low fluid level, a faulty oil pump, a clogged oil receiver, or a broken pressure sensor. If the light comes on while driving, stop immediately and turn off the engine. Continuing to drive can lead to scoring in the cylinders and major repairs.