Transmission oil for manual transmission <em>Nissan Almera Classic</em>: selection, replacement, nuances

Manual transmission Nissan Almera Classic (B10, G15) is a unit that, with proper maintenance, can last hundreds of thousands of kilometers without repair. However, many owners pay attention only to engine oil, forgetting about transmission fluid. But the smoothness of switching, wear of synchronizers and even fuel consumption depend on its condition.

In this article we will look at what kind of oil to fill in a manual transmission. Almera Classicwhen to change it, how many liters will be needed and how to replace it yourself. We analyzed factory recommendations, owner reviews and technical nuances to give clear answers without unnecessary “water”. If you are not sure about the choice of oil or are afraid of damaging the box, you will find proven solutions here.

Original Nissan requirements: what is filled from the factory

Manufacturer Nissan indicates for manual transmission Almera Classic (models B10 And G15) gear oil with specification API GL-4 and viscosity 75W-80 or 75W-90. The original liquid, which is poured on the conveyor - Nissan MT-XZ Gear Oil (art. KE908-99932). This is a synthetic oil with a package of additives optimized for gearboxes Nissan with synchronizers made of brass.

Important: in manuals for markets with extreme temperatures (for example, Russia, Canada) there is sometimes a mention of 80W-90, but this is rather an exception. For most regions 75W-80 is the optimal choice, as it provides easy switching in cold weather and sufficient protection in summer.

• 🔧 API GL-4 - standard for boxes with synchronizers (GL-5 is not suitable due to aggressive additives!).
• ❄️ 75W-80 — universal viscosity for climates from -30°C to +35°C.
• 📦 KE908-99932 - art. original oil Nissan MT-XZ (1 l).
• ⚠️ Factory filling volume - 2.8–3.0 l, but when replaced, it takes ~2.5 liters (some remains in the crankcase).

Is it worth chasing the original? Not necessarily. Analogues from Mobil, Castrol, Liqui Moly or Motul often superior Nissan MT-XZ on quality, but subject to specifications. The main thing is to avoid all-purpose oils GL-4/5 and cheap “no-name” brands.

Analogues of original oil: what to choose instead of Nissan MT-XZ

Original oil Nissan MT-XZ it is expensive (~1,200–1,500 rubles per liter), and finding it in small towns is not always easy. Fortunately, there are proven analogues with the same specifications, which are often recommended by service station technicians and owners. Almera Classic on the forums.

Brand and name	Article	Specification	Viscosity	Note price (1 l)
Castrol Syntrans Transaxle 75W-90	157F4	API GL-4, GL-5	75W-90	~900 ₽
Mobil Mobilube 1 SHC 75W-90	152644	API GL-4/5	75W-90	~1 100 ₽
Liqui Moly Hochleistungs-Getriebeoil 75W-80	3941	API GL-4	75W-80	~1 300 ₽
Motul Gear 300 75W-90	105777	API GL-4/5	75W-90	~1 200 ₽
ZIC G-FF 75W-85	162629	API GL-4	75W-85	~700 ₽

Among the listed oils Liqui Moly 75W-80 And Castrol Syntrans 75W-90 - most popular choices among owners Almera Classic. The first is better suited for cold climates (easier to switch in winter), the second is better suited for hot regions (more stable film at high temperatures).

⚠️ Attention: Oils with markings GL-5 (For example, Castrol EPX or Lukoil TM-5>) are not recommended for manual transmission Almera Classic! They contain sulfur-phosphorus additives, which destroy synchronizers made of soft alloys. Exception - universal oils GL-4/5, if they are certified for boxes with brass synchronizers.

If your budget is limited, you might consider ZIC G-FF 75W-85 - it is cheaper, but according to reviews it is inferior in durability (it is recommended to reduce the replacement interval to 50–60 thousand km). For those who drive aggressively or often tow a trailer, it is better to choose Motul Gear 300 - it can withstand high loads.

When to change manual transmission oil: regulations and signs of wear

Official regulations Nissan for Almera Classic reads: gear oil in manual transmission filled for the entire service life and does not require replacement. However, this rule only applies to “ideal” operating conditions: moderate climate, quiet driving, no load. In reality, the liquid degrades, and here’s why:

• 🔥 Overheating — when towing, driving in traffic jams or in sports style, the oil oxidizes faster.
• 💧 Condensation — moisture enters through the breather, forming an emulsion that accelerates corrosion.
• 🛠️ Metal shavings — wear products of synchronizers and bearings clog the filter (if there is one).
• ❄️ Thickening in the cold — over time, additives lose effectiveness, and oil flows worse in winter.

Recommended replacement intervals:

• 🚗 Standard terms: every 80–100 thousand km or 5–6 years.
• ⚡ Aggressive driving/taxi: every 50–60 thousand km.
• ❄️ Extreme climate (severe frost or heat): every 60–70 thousand km.

Signs that it's time to change the oil:

• 🔊 Crunching or grinding noise when changing gears (especially when cold).
• 🛑 Tight engagement of first/second gear.
• 💨 The smell of burning from the box after a long trip.
• 🎨 The oil on the dipstick (if any) is dark, with metal particles.

⚠️ Attention: If found in oil large metal particles (visible to the naked eye) or it smells burnt, the box is already worn out. In this case, changing the oil may temporarily improve the situation, but be prepared to repair the synchronizers or bearings.

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Before changing the oil, check the condition of the manual transmission breather (it is located next to the clutch drive). If it is clogged with dirt, excess pressure may be created in the box, which leads to leaks through the seals.

Step-by-step instructions for changing the oil in a manual transmission

Changing transmission oil in Nissan Almera Classic - the procedure is simpler than it seems. The main thing is to prepare your tools and take your time. Here's what you'll need:

• 🔧 Key on 10 mm (for drain plug).
• 🔧 Key on 24 mm (for filler plug).
• 🛢️ 2.5–3 l new oil (see section above).
• 🧤 Gloves and rags.
• 🔧 Funnel with flexible hose (diameter ~8 mm).
• 🔧 Capacity for working out (minimum 3 l).
• 🔧 Jack or inspection hole.

If you have a box RS5F31A (installed on Almera Classic B10 with motor QG15DE), then the drain plug is located at the bottom, and the filler plug is located on the side. On models with box RS5F32V (less commonly) the filler hole may be on top, under the air duct.

Warm up the box (drive 5–10 km) - warm oil drains faster |

Raise the car on a jack or drive it into a pit|

Remove the crankcase protection (if equipped)|

Prepare a container for mining and keys|

Wear gloves - gear oil is toxic-->

Step 1. Drain the old oil

1. Place a container under the drain hole (it is located at the bottom of the manual transmission housing).
2. Key on 10 mm unscrew the drain plug. Be careful - the oil may be hot!
3. Wait until the liquid has completely drained (10–15 minutes).
4. Wipe the plug and hole with a rag. Pay attention to the stopper magnet - if there are a lot of metal shavings on it, the box is worn out.

Step 2: Flushing (optional)

If the oil is very dirty or an emulsion is visible in it, flushing is recommended. To do this:

1. Screw in the drain plug.
2. Add through the filler hole 0.5 l new oil + 0.5 l special washing (for example, Liqui Moly Getriebe-Reiniger).
3. Start the engine, engage first gear and let it run for 2-3 minutes (the car must be stationary!).
4. Drain the flushing mixture and start pouring new oil.

Step 3. Filling with new oil

1. Insert the funnel with the hose into the filler hole (it is located on the side of the box, closer to the motor).
2. Pour slowly 2.5 l oils You need to pour until the liquid begins to flow out of the hole (this means that the level is sufficient).
3. Screw the filler plug with a wrench to 24 mm (force - ~30 Nm, do not overtighten!).
4. Wipe the box with a rag and check for leaks.

After replacing, drive 5–10 km and check the oil level. If nothing comes out of the filler hole, add more 50–100 ml. In the first days, watch for stains under the car - sometimes the plug gasket leaks.

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If after replacing the gears it is difficult to engage, the oil may be too thick (for example, 80W-90 instead of 75W-80) or its level has been exceeded. In this case, partially drain the fluid or replace it with a less viscous one.

Common mistakes when changing oil and how to avoid them

Even experienced car owners sometimes make mistakes that can lead to manual transmission failure. Here are the most common:

• 🛢️ Overfilling or underfilling oil. A lack of fluid leads to oil starvation, an excess leads to foaming and leaks through the seals. Optimal level - when oil begins to flow out of the filler hole.
• 🔧 Using the wrong oil. For example, GL-5 instead of GL-4 or mineral water instead of synthetics. This accelerates wear on the synchronizers.
• 🧲 Ignoring the magnet on the drain plug. If you don't clear it of chips, they will fall back into the box and accelerate wear.
• 🚗 Changing the oil with a cold box. Cold oil is not completely drained; up to 200–300 ml working off.
• 🔧 Pulling plugs. This leads to thread cutting or deformation of the copper gasket (if any).

Another typical problem is leaking through the drive seal after replacement. This happens if:

• Oil with the wrong viscosity (too thin, e.g. 75W-80 instead of 75W-90).
• The level is exceeded (oil is squeezed out through the seals).
• The oil seal itself is worn out (replacement is required).

⚠️ Attention: If after changing the oil there is howl or hum the box most likely contained oil with inappropriate additives (for example, GL-5 instead of GL-4). In this case, you urgently need to drain it and rinse the box.

To avoid errors, before replacing, check:

• 📋 Oil compatibility with your box (see section "Analogs").
• 🔧 Availability of all tools and gaskets (if plugs have rubber rings).
• 📏 Oil level after filling (it should flow out of the control hole).

Owner reviews: which oil did they choose?

On forums and social networks, owners Nissan Almera Classic actively share their experience in changing transmission oil. Here's what they recommend:

• 👍 Castrol Syntrans Transaxle 75W-90 - the most popular choice. They note easy switching in winter and no leaks. The downside is the price (~900 ₽/l).
• 👍 Liqui Moly 75W-80 - praised for the quiet operation of the box and long service life. Suitable for cold regions.
• 👎 ZIC G-FF 75W-85 - cheap, but some complain about deterioration of switching after 30-40 thousand km.
• ⚠️ Mobile 75W-90 — there are reviews about leaks through the seals (possibly due to high fluidity).
• 🔥 Original Nissan MT-XZ - those who have tried it note its good properties, but complain about the price.

Interesting observations from the owners:

• 🚗 After changing the oil to Castrol Syntrans many have noticed that second gear shifts easier (especially when cold).
• ❄️ In the cold (-25°C) Liqui Moly 75W-80 behaves better than Motul 75W-90.
• 🛠️ With a mileage of >150 thousand km after an oil change, sometimes bearing noise increases - this is a sign of wear, not an oil problem.

Some owners experiment with additives (for example, Liqui Moly Getriebe-Oil-Additiv), but most agree: It's better to change the oil more often than to add additives. If the box is already worn out, no amount of additives will return it to its original condition.

What happens if you don’t change the oil in your manual transmission?

Over time, gear oil loses its properties: additives burn out, sludge forms, and metal shavings act as an abrasive. As a result:

- The wear of synchronizers increases (a crunching noise appears when switching).

- Shaft bearings run dry, which leads to hum.

- The seals become dull and begin to leak.

- In winter, the box may “freeze” - the gears are engaged with great effort or not engaged at all.

In critical cases, a major overhaul of the manual transmission is required (replacement of synchronizers, bearings, and sometimes shafts), which costs 20–40 thousand rubles.

FAQ: Frequently asked questions about manual transmission oil Nissan Almera Classic

❓ Is it possible to mix different oils in a manual transmission?

Mix oils of different brands or viscosities not recommended, as additives may react. An exception is adding a small amount (up to 10%) of oil same type and specification (For example, Castrol 75W-90 GL-4 in Liqui Moly 75W-90 GL-4). If you had to mix different oils, it is better to shorten the interval until the next change.

❓ How much oil is needed for a complete change?

In manual transmission Nissan Almera Classic fits 2.8–3.0 l oil, but when replaced it drains ~2.3–2.5 l (part remains in the crankcase). For a complete replacement with flushing you will need 3 l new fluid.

❓ Do I need to rinse the box when changing the oil?

Flushing is only necessary if:

• The oil is very dirty (black, emulsified).
• The box was filled with liquid of unknown origin.
• When replacing, a different type of oil is used (for example, switching from mineral water to synthetic).

For washing, use special compounds (for example, Liqui Moly Getriebe-Reiniger) or fresh oil of the same specification.

❓ What oil to fill in manual transmission Almera Classic with mileage >200 thousand km?

For high mileage boxes it is recommended:

• Increased viscosity: 75W-90 instead of 75W-80 (better protects worn parts).
• Oils with anti-wear additives: for example, Motul Gear 300 or Castrol Syntrans Transaxle.
• Shortened replacement interval: every 50–60 thousand km.

Avoid thick oils like 85W-90 - they can worsen switching in winter.

❓ Is it possible to use automatic transmission oil in a manual transmission?

Absolutely not! Automatic transmission oils (ATF) have a completely different composition and viscosity. Their use in a manual transmission will lead to:

• Rapid wear of synchronizers.
• Problems with gear shifting.
• Leaking through the seals.

If ATF was added by mistake, drain it as soon as possible and wash the box.