Engine oil reduces friction between sliding surfaces, which reduces wear on pistons with piston rings and cylinders, bearings and valve train parts.

Engine oil is also used for micro-sealing between pistons, piston rings and cylinder walls, as there is always a gap of a few microns between these parts. Thanks to the additional sealing action of the oil, the high gas pressure resulting from combustion is transferred without loss to the piston crown and converted into kinetic energy. In this way, optimum engine power is achieved.

Another function of engine oil is to provide additional engine cooling. When fuel is burned, only a quarter of the released energy can be used to move forward, part of the energy leaves the engine with exhaust gases, the rest of the heat energy must be removed by the coolant and engine oil. So, for example, the piston can only be cooled by engine oil. On the one hand, the heat from the pistons is transferred through the piston rings and sealing oil to the working surfaces of the cylinders, then to the coolant. On the other hand, the oil sprayed into the crankcase directly cools the pistons. Accordingly, each bearing of the crankshaft, camshaft, etc. cooled by the flow of oil passing through it. The heat accumulated by the engine oil is transferred through the walls of the oil pan to the air flow around it.

Multigrade oils

Modern oils are lubricants refined from petroleum. But, before a lubricant refined from petroleum turns into motor oil, oil manufacturers add special additives to it, which at the end of the production process make up to 20% of the oil formulation.

Additives protect the oil from oxidation and prevent the formation of foam at high engine speeds. One of the most important additives are viscosity index improvers, which are long molecular chains that swell when heated and contract again when cooled. These additives act in such a way that the oil adjusts to the temperature regime of the engine and covers several viscosity classes at once. These additives also have a negative property: at high temperatures, they lose most of their properties. In addition, water, fuel and combustion residues set a limit on the life of an engine oil. Mineral oil does not withstand the pressures and temperatures prevailing in the engine for long enough. Therefore, regular oil changes are not a luxury that you can refuse, but a necessary standard to ensure the normal and long-term operation of your engine.

Synthetic oils

Synthetic oils are considered the most expensive, as they are partially composed of artificial chemical compounds of carbon, hydrogen and oxygen. In this case, only those molecules are selected that can optimally perform the required lubrication tasks. In practice, this means that these oils age much more slowly than mineral oils. They also evaporate more slowly and have a high long-term stability, which means that they retain their original high viscosity grade for a long time.

Purchasing engine oil

Ford recommends SAE 5W-30 engine oils (for SAE 10W-40 diesel engine) that meet ACEA A1-96, B-96 specification or Ford WSS-M2C912-A1 specification (for ACEA A3-96, B3-96 diesel engine ) ( , ). If you wish to use another oil, it must be of API SH quality for gasoline engines (for diesel engines CC MC G5, PD2, API SH). Oils with an API designation of SC, SD, SE, or SF can even interfere with the normal operation of your engine. If the oil meets the above criteria, oils from different manufacturers can be mixed with each other. You only have to consider that the special qualities of previous formulations may deteriorate over time. Each type of oil is distinguished by a special formulation of additives, the effect of which, when mixed with other oils, may deteriorate. For this reason, mixing mineral and synthetic oils is also not beneficial.

TECHNICAL DICTIONARY

Basic concepts. Oil classification systems

Viscosity.

This is a value for determining the fluidity of the oil. In winter, the engine oil must be so thin that, after starting a cold engine, it immediately gets to all lubrication points. On the contrary, in summer it is necessary to use a thick oil so that the oil film does not break at high temperatures.

SAE (Society of Automotive Engineers).

The fluidity of an oil is indicated by the viscosity grade. Appropriate classes are established by the American Institute of the Society of Automotive Engineers (SAE), for example, SAE 5W-30. The lower the first number, the easier the oil flows at low temperatures (W - winter). Oil 0W flows at a temperature of -30 °C, at 5W this figure increases to -25 °C, at 15 W - up to -15 °C. The higher the second number, the better the oil resists high temperatures.

ACEA (Association des Constructeurs Européen d'Automobiles).

Introduced in 1996, the European standard for oil, which replaced the CCMS standard. For gasoline engines, there are groups A1 (not containing rectified alcohol), A2 (with a low content of rectified alcohol) and A3 (energy-saving oil). For diesel engines, oils are divided into groups B1, B2 and B3.

CCMS (Comitté des Constructeurs d'Automobiles du Marché Commun).

The specification consists of the letters "G" (gasoline) and "PD" (diesel) and a number. The higher the number, the better the quality of the oil.

API (American Petroleum Institute).

The specification consists of the letter "S" (gasoline engine) or "C" (diesel engine), as well as the subsequent letter. The further the letter is in the alphabet, the better the quality of the oil.

For this reason, you should not mix pure diesel oils with gasoline engine oils, in the worst case, you will cause serious damage to your engine.

Fiesta gasoline engines do not require the use of expensive synthetic oil. Ford recommends using SAE 5W-30 viscosity grade oil in our latitudes (see).

Oil consumption

If your Fiesta engine is in excellent technical condition, you should add a small amount of oil (0.25-0.5 l) between the prescribed oil change intervals, this is no exception for a diesel engine. This rule is valid for all engines only if you regularly change the oil and your engine is not overloaded by excessively harsh, sporty driving. Any engine uses some oil. Part of the engine oil burns out during engine operation, which is normal. Leaky places in the engine, damaged timing gaskets, worn oil scraper rings, too large clearances between the pistons and cylinder surfaces, or too large clearance between the valve guides and valve stems will dramatically increase normal oil consumption.

Blue exhaust plume - wear indicator

By looking at the blue exhaust plume, you can directly identify one of the many engine faults. Even when the oil level remains unchanged, this does not indicate a normal engine condition: excess fuel and condensed water dilute the oil, which leads to a deterioration in its lubricating properties. This phenomenon is observed primarily in winter and when driving short distances - the engine rarely reaches its operating temperature, and the moisture does not have time to evaporate from the oil. In this case, it is necessary to change the oil at shorter intervals: after 6000 km of run or once every six months.

The classification of light-engine (for gasoline engines) oils according to API can be generally understood as follows - with each next letter of the alphabet, the quality of the oil is higher.
SG → SH → SJ → SL → SM → SN

35 +30 SAE 5W-30
-30 +35 SAE 5W-40
-25 +30 SAE 10W-30
-25 +40 SAE 10W-40
-20 +45 SAE 15W-40
-15 +50 SAE 20W-50

European original NISSAN engine oil for Nissan Sunny

Synthetic motor oil for Nissan Sunny engine Nissan Motor Oil 5W-40
ASEA A3/B4,
API class: SL/CF
manufacturer Total

Semi-synthetic engine oil for Nissan Sunny engine Nissan Motor Oil 10W-40
ASEA A3/B4,
API class: SL/CF
manufacturer Total

Japanese Nissan oils

Oil for Nissan Sunny Nissan Strong Save X SN 5W-30
original multigrade engine oil Nissan Sunny

Oil for Nissan Sunny Nissan Extra Save X SN 0W-20
Fully synthetic winter engine oil top quality for petrol engines Nissan Sunny
It has outstanding low temperature performance and high antioxidant properties.
Provides easy start and reliable operation of the engine at extremely low temperatures.
Extremely suitable for winter engine operation.

Oil for Nissan Sunny Nissan Strong Save X E Special SM 5W-30
All-weather engine oil Nissan Sunny

Oil for Nissan Sunny Nissan Endurance SM 10W-50
Summer engine oil high quality for gasoline engines Nissan Sunny

Oil for Nissan Sunny Nissan Strong Save X M Special SM 5W-30
All-weather engine oil high quality for gasoline engines Nissan Sunny

Oil for Nissan Sunny Nissan Extra Save X SJ 10W-30
All-weather engine oil for petrol engines Nissan Sunny
Manufactured using the most modern oil refining technology - hydrocracking, it takes into account all the requirements of Nissan engines for lubricants.
Provides maximum engine protection against wear, confident winter start-up, prevents the formation of deposits.

Engine oil NESTE Finland

Neste City Pro 0W-40 ACEA A3/B4 API SJ/CF
Neste City Pro 5W-40 ACEA A3/B3 A3/B4 API SM, SL, SJ/CF
Keeps oil consumption low, saves fuel, reduces engine wear during long oil change intervals, keeps the engine clean and prolongs the life of the aftertreatment device. It is recommended to use all year round in all conditions, in gasoline and diesel engines of passenger cars. It is suitable for both naturally aspirated and turbocharged engines. The benefits of the oil are especially evident in modern vehicles and in summer and winter conditions. Its use contributes to the reliable operation of the engine and the easy start necessary for the catalyst, low oil consumption and engine cleanliness. Neste City Pro 5W-40 exceeds the latest quality requirements of most car manufacturers, but can also be used in older engines.

Full synthetic engine oil for Nissan Sunny
Neste City Standard 5W-40 ACEA A3, B3, B4 API SL/CF
Neste Citystandard 10W-40 ACEA A3, B3, B4 API SL, SJ/CF
Neste City Standard 5W-40 10W-40 is recommended for passenger cars and
minibuses with petrol and diesel engines. Suitable for
use all year round under normal climatic conditions as for
engines with and without turbocharging.

Semi-synthetic engine oil for Nissan Sunny
Neste Premium10W-40 ACEA A3/B3 API SJ/CF
Neste Premium is recommended to be used all year round in petrol and
diesel engines of passenger cars. Its use contributes
reliable engine operation and easy starting, low oil consumption and
engine cleanliness.

Totachi Synthetic Motor Oils

Oil for Nissan Sunny Totachi Extra Fuel Economy 0W-20

API SN
ACEA C1/C2
ILSAC GF-5
Fully synthetic motor oil for passenger car gasoline engines recommended for use in the most advanced gasoline engines in passenger cars, sports cars and SUVs equipped with multi-valve valve timing, fuel injection, turbocharging and other advanced performance enhancement systems.

IMHO Oil for extremely cold climates, more winter than all-weather. In the summer, you can screw up the engine.

Ultra Fuel Economy 5W-20

API SN
ACEA C1/C2
ILSAC GF-5

Fully synthetic motor oil for passenger car gasoline engines recommended for use in the most advanced gasoline engines in passenger cars, sports cars and SUVs equipped with multi-valve valve timing, fuel injection, turbocharging and other advanced performance enhancement systems.

IMHO Oil for extremely cold climates, more winter than all-weather. In the summer, you can screw up the engine.

Oil for Nissan Sunny Totachi Ultima Ecodrive L 5W-30

API SN/CF
ACEA C3
ILSAC GF-5
GM dexos2
VW 502 00/505 00
MB 229.31/229.51
BMW LL-04
Fully synthetic motor oil recommended for use in modern gasoline and diesel engines of passenger cars, sports cars and off-road vehicles equipped with the latest exhaust aftertreatment systems and requiring these specifications.

IMHO Pay attention to the approvals of GeneralMotors VolksWagen MercedesBenz BMW - these will not sign in vain

Oil for Nissan Sunny Totachi Ultima Ecodrive F 5W-30

API SN/CF
ACEA A5/B5
ILSAC GF-5
Ford WSS-M2C913-C
Ford WSS-M2C913-B
Ford WSS-M2C913-A

Fully synthetic motor oil recommended for use in modern gasoline and diesel engines in passenger cars, sports cars and SUVs equipped with advanced performance systems and requiring these specifications.

Oil for Nissan Sunny Totachi Grand Touring 5W-40

API SN
ACEA A3/B4
ILSAC GF-4
Fully synthetic engine oil recommended for use in advanced gasoline and diesel engines in passenger cars, sports cars and SUVs equipped with multi-valve valve timing, turbocharging and other high performance systems.

IMHO All-weather oil for warm climates.

Oil for Nissan Sunny Totachi Grand Racing 5W-50

API SN/CF
ACEA A3/B4
API Resource Conservation

Fully synthetic engine oil recommended for use in gasoline and diesel engines of passenger cars, sports cars and SUVs equipped with multi-valve valve timing, turbocharging and other high-tech performance enhancement systems.

IMHO Oil for the southern regions Rostov-on-Don Krasnodar Stavropol Sochi. Riding in the heat in summer.

Totachi semi-synthetic engine oils

Oil for Nissan Sunny Totachi Eco Gasoline 5W-30

API SM/CF
ACEA A5/B5
ILSAC GF-4
Semi-synthetic engine oil recommended for use in advanced gasoline and diesel engines in passenger cars, sports cars and SUVs equipped with multi-valve valve timing, turbocharging and other high performance systems.

Oil for Nissan Sunny Totachi Eco Gasoline 10W-40

API SM/CF
ACEA A3/B4
ILSAC GF-4
VW 502 00/505 00
Semi-synthetic motor oil recommended for use in advanced gasoline and diesel engines in passenger cars, light commercial vehicles and all-terrain vehicles equipped with multi-valve valve timing, turbocharging and other high performance systems.

Engine Nissan QG15DE 1.5 l.

Characteristics of the Nissan QG15DE engine

Production	Yokohama Plant
Engine brand
Release years	2000-2006
Block material	cast iron
Supply system	injector
Type	in-line
Number of cylinders	4
Valves per cylinder	4
Piston stroke, mm	88
Cylinder diameter, mm	73.6
Compression ratio	9.9
Engine volume, cc	1498
Engine power, hp / rpm	90/5600 98/6000 105/6000 109/6000
Torque, Nm/rpm	128/2800 136/4000 135/4000 143/4000
Fuel	95
Environmental regulations	Euro 3/4
Engine weight, kg	-
Fuel consumption, l/100 km (for Almera) - city - track - mixed.	8.6 5.5 6.6
Oil consumption, g/1000 km	up to 500
Engine oil	5W-20 5W-30 5W-40 5W-50 10W-30 10W-40 10W-50 10W-60 15W-40 15W-50 20W-20
How much oil is in the engine	2.7
Oil change is carried out, km	15000 (preferably 7500)
Operating temperature of the engine, hail.	-
Engine resource, thousand km - according to the plant - on practice	- 250+
tuning - potential - no loss of resource	- -
The engine was installed	Nissan Almera/Nissan Bluebird Sylphy Nissan Sunny Renault Samsung SM3

Malfunctions and repair of the QG15DE engine

The Nissan QG15DE engine was developed from the 1.6 liter QG16DE and was intended to replace the GA15DE. In the QG16DE cylinder block, the cylinder diameter was reduced from 76 mm to 73.6 mm. Accordingly, other pistons were used, and the compression ratio increased to 9.9. Otherwise, it is the same QG16DE. To reduce exhaust toxicity, an EGR system is used here, and a mechanical throttle valve is also used.

Since 2002, after some updating, the engines received a variable valve timing system on the CVTC intake shaft, an electronic throttle valve and the EGR valve was removed.

QG15DE motors were equipped with a timing chain, replacement is carried out approximately every 150 thousand km, sometimes earlier.
The QG15DE was not equipped with hydraulic lifters, so the valves need to be adjusted every 40-50 thousand km.

The motor was not produced for too long and for some time, the QG15DE was removed from under the hoods of Nissan cars, and the newer HR15DE took its place.

Problems and disadvantages of Nissan QG15DE engines

The QG16 and QG18 motors are similar in design to the QG15, so their problems are the same: it won’t start, high fuel consumption, noise, whistling, and so on. Details can be found.

Nissan QG15DE engine tuning

Chip tuning

Your best bet is to buy a QG18DE engine and swap it. Tuning a 1.5 liter vegetable engine is not a good idea. However, if there is nothing to do, you can buy a 4-2-1 exhaust system and do a chip tuning. This will give about 10 hp. and aggressive sound, the rest is superfluous.