Knowledge base


Q1. What are the tasks of the oil in the engine?

The tasks of the engine oil are:
- Lubricate, reduce friction and wear
- Clean and disperse contamination and deposits
- Seal
- Cool

Q2. What oil should I use in the engine of my car?

Refer to the service and maintenance pages of the Owner’s Manual of your car for the specifications of the recommended oil for the engine and look on the VEEDOL International website, www.veedol.com , for the correct lubricant to be used.

Q3. How do I know which engine oil is approved for my car?

Check if the specifications of the VEEDOL engine oil on the can or bottle label match with the specifications of the recommended lubricant on the service and maintenance pages of the Owner’s Manual of your car. Or contact VEEDOL for advice.

Q4. What do the ACEA, API and SAE oil classification systems mean?

The ACEA, API and SAE oil classification systems give details of the requirements of lubricants.
ACEA, the Association des Constructeurs Européens d’Automobiles (or the European Automobile Manufacturers Association) and API, the American Petroleum Institute, issue oil specifications and sequences with the technical and chemical requirements for engine and gear oils.
Samples: ACEA A3/B4, for petrol and light duty diesel and API : SN for petrol or API : CJ-4 for diesel.

SAE, the Society of Automotive Engineers, issue data and tables for the viscosity (fluidity) of engine and gear oils.
Samples: SAE 5W-30 for engine oil and SAE 75W-80 for gear oil.
Sample of VEEDOL grades: VEEDOL Sintron Longlife III 5W-30 and VEEDOL Gear Oil Special HD 75W-90.

Q5. What does viscosity mean?

The viscosity is the indication for the fluidity (thin, thick and everything in between) of a lubricant.
A high number indicates a ‘thick’ oil, e.g. SAE 50 for engine oil or SAE 140 for a gear oil and a (very) low number for a ‘thin’ oil, SAE 5W for engine oil or SAE 75W for a gear oil.
Today the most common engine and gear oil viscosities are SAE 5W-30 respectively SAE 75W-90.
These are so called multigrade oils which can be used in summer and winter (all seasons). The W in the viscosity grade indicates a Winter grade for the lower (winter) temperatures.

Q6. What role does the viscosity play in engine oil?

The correct and recommended viscosity of the oil is a guarantee for safe lubrication of the engine at all ambient temperatures.

Q7. Can I use the same oil in summer and winter?

Today’s modern multigrade lubricants (see also Q5) can be used during summer and winter.
Multigrades exist since the seventies and can be easily recognized by the double figures, e.g. SAE 5W-40, 5W for the winter period and 40 for the summer period. All VEEDOL engine oils and almost all gear oils are multigrades.

Q8. Which oil is suitable for a turbo diesel engine?

In general all modern passenger car engine oils can be used in turbo diesels, see the information on the oil can or bottle label. In the past special diesel and diesel turbo oils were recommended because of the higher load/strain on the oils by the higher operating temperature of a diesel engine (particular with a turbo) and the higher contamination of the oil. All VEEDOL engine oils for cars and vans are suitable for use in petrol, diesel and turbo diesel engines.

Q9. What is the difference between a synthetic and a mineral oil?

Oil is composed of a base oil and additives. A mineral oil has 100 % mineral base oil content. A synthetic oil should ideally have 100 % synthetic base oil content but is very often made with special high quality hydrocracked or part synthetic base oil.The VEEDOL lubricants portfolio contains synthetic, semi-synthetic (non-conventional) and mineral engine and gear oils.

Q10. What is the advantage of (very) thin oils, e.g. SAE 0W-30 or 5W-30?

The advantage of thin oils is easier starting of the engine at low (freezing) temperatures and the instant lubrication of all engine parts when the engine is started. The very thin oils such as 0W-30 and 5W-30, recommended in the last couple of years, are specially developed to improve the engine fuel economy. To make the picture complete the oil industry has also developed fuel economy gear oils. Less fuel consumption means less pollution and often less car related taxes.

VEEDOL Sintron Longlife III 5W-30, Sintron V 0W-30, Powertron C3 Ultra 0W-30, Gear Oil Special HD 75W-90 and Gear Oil LD 75W-80 are a few samples of the series of VEEDOL fuel economy oils.

Q11. Why do you need to check your engine oil level frequently/regularly?

The correct engine oil level is important for the proper lubrication of the engine. A (too) low engine oil level will result in a high oil temperature and can cause poor lubrication, extra wear or even loss of lubrication.

Q12. When do you check your engine oil level?

The basic rule when to check your engine oil level is at every fuel stop or before a long (holiday) trip. Many modern cars have a warning lamp for a low engine oil level, see the Owner’s Manual. Check the oil level and top up when the oil level warning lamp lights up.
Note: Do not confuse the oil level warning lamp with the oil pressure warning lamp. Stop the engine immediately when the oil pressure warning lamp lights up! Check the reason; it might be a low oil level. If not, call the road service for (professional) help.

Q13. How to check and top up your engine oil?

The procedure how to check and top up your engine oil is described and illustrated in the Owner’s Manual of your car. Preferably check the engine oil when the engine is still hot and wait a few minutes after you have stopped the engine. Check if the car is level and wipe the dipstick clean with a non-fluffy cloth or a paper tissue. Top up with fresh VEEDOL engine oil when the level is near the minimum mark. Do not overfill! The difference between the minimum and maximum mark on the dipstick is mostly about one litre. Always take a spare one litre bottle with fresh VEEDOL engine oil of the correct grade with you (in the boot of the car).

Q14. Why do you have to change your engine oil regularly?

The task of the engine oil is amongst other things to reduce wear and clean and disperse contamination and deposits from the combustion process. The high temperatures in the engine and of the oil cause oxidation of the oil. All these factors together have a negative effect on the performance of the oil and are the reason that the engine oil has to be changed at regular intervals.

Q15. When do you change the engine oil?

The standard change intervals for the engine oil are given in the Service and Maintenance section of the Owner’s Manual and differ from engine to engine and from car manufacturer to car manufactu- rer. Change intervals can vary from 15.000 to 40.000 km but there is also a time limit of maximum 2 years. The advice is to change the engine oil more frequently, at least once a year, if you drive frequently short distances or a low mileage per year (less than 10.000 km).
All VEEDOL engine oil grades are to be changed at the recommended or advised change intervals.

Q16. When do you need to change the engine oil filter?

As with the oil change the recommended change interval for the oil filter is also given in the Service and Maintenance section of the Owner’s Manual. Depending on the service interval of the engine it is recommended or advised to change the oil filter at every oil change.

Q17. Can I change the engine oil and the oil filter myself?

Yes and no. It all depends on your skills and if you have the right tools. If yes, take care of the correct disposal of the used oil and filter (chemical waste). If not, go to a garage/workshop where they can change the oil and the oil filter. And dispose of the used oil and filter.

Q18. What do I do with the used oil and the old oil filter?

You have to dispose of the used oil and the old oil filter at an official (household) waste recycling site.
It is not allowed to dispose the oil in any other way or throw the oil filter into the dust bin.

Q19. What do I do if the engine oil warning lamp lights up?

This depends on whether the function of the oil warning lamp is for oil pressure or for a low oil level. Consult the Owner’s Manual in case of doubt. Stop the engine immediately when it is the oil pressure warning lamp and check the oil level. Top up with the recommended fresh VEEDOL engine oil in case of a low engine oil level. Then start the engine and check if the oil pressure warning lamp extinguishes. If not stop the engine and call the road service for (professional) help.
If it is the oil level warning lamp check the oil level and top up with the recommended fresh VEEDOL engine oil. Check that the oil level warning lamp extinguishes after topping up the engine oil. See also Q12.

Q20. What could be the reason of smoke coming from the exhaust?

This depends on the color of the smoke.
Blue/black smoke indicates that the engine is burning oil (possible oil consumption). Check the oil level frequently and ask your garage or dealer for advice. It is also possible that the engine oil is (was) overfilled.
Black smoke indicates that the engine is burning excess fuel. See your garage/dealer for advice.
White smoke with a cold engine (just after start of the engine) indicates that the engine is burning the moisture (condensation) from the exhaust. It will disappear when the engine reaches the normal operating temperature (5 to 10 minutes)
White smoke with a warm/hot engine indicates a problem (internal leak) with the engine cooling system which very often can be related to the cylinder head gasket. Stop the engine and call the road service or your garage or dealer.

Q21 What could be the reason of a strange sound coming from the engine or transmission?

There can be many reasons from a very low oil level to mechanical failures such in areas like distribution, bearings and gears. Always stop the car, switch off the engine and call the road service.

Q22. Car maintenance/service intervals

Car maintenance at the recommended service intervals is important for a proper functioning and will extend the operational life of your car. Levels of the oils and fluids of engine, transmission, cooling system, clutch and/or brake system, power steering and windscreen wash systems are checked, replenished or changed and filters replaced. Furthermore the electrical, brakes, suspension and tires are checked.
The service intervals differ per car make and components, but for a safe operation it is advisable to do the checks at least once a year. There is a lot you can do yourself. If not, please go to a garage/workshop.

Q23. Car care when the car is not used for a longer period.

Check the oil and cooling system level before you start the engine. Before you drive away please check the brakes (in particular the handbrake) and the condition, profile and pressure of all tires (including the spare tire).

Q24. Car care before summer and winter.

Apart from the ‘standard’ checks, see Q22. Particular attention should be paid to the cooling system.
Check also the antifreeze protection before the winter period as well as the windscreen wash sys- tems. Also the condition of the drive belt(s) for the water pump, alternator, power steering and air- conditioning. And finally the (charge) condition of the battery.
Tip: Also switch on the air conditioning system once a month in the winter period for a short time.

Q25. Car care before a long (holiday) trip.

Always check the engine oil and cooling system levels before a long trip. Check the engine oil level again after the long trip. Also check and adjust if necessary (depending on the extra load) the tire pressures.

Q26. Car care under adverse operating conditions, e.g. short trips or caravanning.

Similar to the normal car maintenance, but however the intervals should be more frequent or shorter, sometimes halved.

Q27. How to achieve maximum fuel economy?

Basically with your driving style or in other words with your right foot. Drive and brake smoothly, shift up to the next gear at ‘medium’ rpm. Switch the engine off at long stops (e.g. waiting for an open bridge or a railway crossing). And check the tire pressures frequently.
And of course use, if allowed and recommended, VEEDOL fuel economy oils!

Tip: Go to the VEEDOL website for more information about fuel economy oils!
VEEDOL Sintron Longlife III 5W-30, Sintron V 0W-30, Powertron C3 Ultra 0W-30, Gear Oil Special HD 75W-90 and Gear Oil LD 75W-80 are a few samples of the series of VEEDOL fuel economy oils.