Frequently asked questions

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According to which standard engine oil 10W-40 SL DETROIL is produced?

Semi-synthetic engine oil DETROIL SAE 10W-40 SL/CF is manufactured in strict compliance with requirements to engine oils with viscosity as per SAE 10W-40 and operating class API SL.

How to switch from one engine oil grade to another?

If you used high-quality mineral, or synthetic, or semi-synthetic oil for your engine, if change intervals were not violated, if normal vehicle operation mode was followed, and if there are no considerable deposits on the engine, then changing the oil grade shall be performed in accordance with regular oil change recommendations specified in the operation manual. In all other cases, that are:

  • When grade of oil poured in the engine is unknown
  • When vehicle’s mileage after the last oil change is unknown
  • When there are considerable deposits on the inner surfaces of engine, which usually appear as a result of low-quality oil use, violation of change interval, or ingress of foreign substances such as coolant, special additives, etc. into oil requiring engine washing
It is recommended to use mineral or synthetic wash oil (depending on which oil will be used for the further operation) for engine washing.

To what extent oil change interval may be prolonged or shortened?

Lubricant change intervals are always defined by the motor vehicle components manufacturers, and specified in operation manuals.

As lubricant’s service life strongly depends on a vehicle operation conditions, there are some recommendations related to adherence to the engine oil change intervals:

  • Normal operating conditions area of mild climate, lack of increased dust content and big traffic jams; use of fuel of recommended quality; use of recommended lubricants (SAE, API, ACEA, ILSAC, OEM); ‘moderate’ driving style; timely maintenance. To tell it straight, these conditions are ideal and have more semblance of car driving by a housewife who drives kids to school every day and goes to the supermarket twice a week. Such operation conditions indeed allow following recommendations of a car maker in regard to the engine oil change interval.
  • Severe operating conditions area with sudden climatic changes during calendar year (from dry to humid, frequent engine starts in condition of low temperatures), high dust content (sand dust), unavoidable traffic jams, unstable fuel quality (filling up at various gas stations offering different fuel quality), use of unauthorised lubricants (selection of a lubricant on accord of a car owner using advise from friends), aggressive driving style (quick shift between acceleration and braking, driving at increased rpm), technical maintenance by unauthorised service station. Conditions, which are used for strength test of a vehicle every time. In this case it is advised to use the following method of oil change interval calculation: divide mileage recommended by the car maker by 2.

Here’s a little example:
Vehicle: DODGE Avenger; year of manufacture: 2014; 2.4l and 3.6l engines
Recommended engine oil: SAE 5W-20, Chrysler MS-6395
Normal running conditions: every 10,000 miles (16,000km) or every 12 months (whichever is earlier)
Severe running conditions: every 4,000 miles (6,500km) or every 6 months (whichever is earlier)

Vehicle’s engine technical condition materially affects the engine oil service life as well.
Fault condition of engine will inevitably result in reduction of recommended engine oil change interval, and your vehicle’s engine operating conditions are immediately switched to ‘SEVERE’ rank.

Faults of cylinder-piston group will certainly lead to premature thermal oxidation of engine oil, high-temperature deposits, and kinematic viscosity coefficient variation.

Faults in the air-fuel mixture preparation and supply system may affect quality of air-fuel mixture prepared. Overrich mixture does not burn completely. Fuel residues will surely get to the engine oil in engine crankcase through the worn-out piston rings. Fuel in engine oil will make evaporative index worse, and reduce the flash-point value. This will certainly result in lacquer and piston ring sticking.

Faulty condition of oil pump will not allow delivery of pressure required to supply oil to the lubricating points, for greasing, and elimination of heat as needed. As a result, oil starvation will appear. Due to lack of grease, overheating in crankshaft and countershaft friction points will lead to oil film shift, oil burning in friction point, and seizure.

Conclusion: making decision on prolongation of engine oil change interval the one should consider:

— Manufacturer’s recommendation regarding viscosity (considering climatic conditions in the area of vehicle operation), and engine oil operation class;

— Your vehicle manufacturer’s recommendation regarding engine oil change intervals depending on operation conditions (normal/severe);

— Technical condition of your vehicle’s engine.

In case of malfunctioning of your vehicle’s engine, you should immediately approach to the service station for troubleshooting. Engine oil will perform its functions correctly only in technically sound car engine.

To which machinery engine OIL DETROIL DIESEL INTENSIVE 10W-40 CI-4/SL may be applied?

Semi-synthetic diesel engine oil DETROIL Diesel Intensive 10W-40 CI-4/SL is designed for application in four stroke high-speed turbo-charged diesel engines installed on light commercial, commercial road and off-road machinery, construction and agricultural equipment, and complying with environmental regulations EURO-IV, EURO-III, and EURO-II including EGR exhaust gas recirculation system in accordance with requirements of ACEA E7 standard. Also this product may be applied in petrol engines installed on light, medium, and heavy commercial machinery. Engine oils of API SL operation class are recommended to be applied to that machinery.

Additionally, Diesel Intensive series oil may be applied to the engines Cummins (CES 20077), Caterpillar (ECF-1a), MAN (MAN 3275), DEUTZ (DCQ-III), Volvo (VDS-3), MTU (MTU 2.0), Renault (RLD-2), and MACK (EO-M+) in accordance with the standards specified in parenthesis.