Gulf Auto Zone

Ask the Lube Guru

  1. When can we claim that a lubricant has a Fuel Economy property?

Fuel Economy performance of car engine oils is tested, assessed and certified by American Petroleum Institute. Engine oil certified for Fuel Economy displays the logo of Star Burst like the figure shown below:


Bapco Charger Eco 5W/30 is a certified resource conserving full synthetic

engine oil for latest generation of cars.


  1. Is it possible to mix two different brands of engine oils?

To get the full benefits in performance and engine protection we do not recommend mixing two different brands of engine oils in your engine. In extreme cases however like when you are in a remote location and the only available engine oil brand is different from what you have in your engine crankcase and you need to top up you may use the other brand (provided it is in the same viscosity grade), run the vehicle and have an oil change as soon as the preferred brand becomes accessible.


  1. How to measure the quality of a lubricant ?

The quality of Lubricants are measured using test procedures developed organizations like American Society of Testing and Materials (ASTM), International Standard Organization (ISO), IP (Institute of Petroleum) , Deutsches Institut für Normung (DIN) to name a few and accepted by the industry and institutions like American Petroleum Institute ( API), American Chemistry Council, Technical Committee of Additive Manufacturers in Europe, ATIEL.


  1. How to choose the viscosity grade while opting for a lubricant ?

The best way to choose the correct lubricant for your engine is to consult your vehicle’s manual. This is a book normally found in the glove compartment of your car. It specifies what SAE Grade (30, 40, 20W-50, 5W-40, 5W-30, etc) and what Performance Categories ( API SL,SM or SN) is required to be used to ensure satisfactory operations of your engine otherwise operational integrity and engine durability might be compromised.


  1. Does the change of color indicates that it is time to change the oil ? Color is not a sole indicator for the oil to be change. There are still other properties like the Alkaline Reserve, Viscosity and the level of contaminants in the oil like Soot, wear debris, particulates and fine sand in some cases.


  1. Oil drain is based on the duration of months or the number of kilometers?

The vehicle’s manual normally says change the oil every five thousand kilometers or six months whichever comes first.


  1. What is a fuel Economy lubricant?

A Fuel Economy lubricants are those lubricant normally formulated with lower viscosity grades like 0W, 5W and 10W engine oils. The economy benefits could range from 1.5% to 2.6 %. Not really much in the Middle East Region for now but could be significant as the fuel subsidies are reduced. Fuel Economy is tested according to Sequence VID Spark Ignition engine. Additionally, these oils have demonstrated to provide greater emission system and turbocharger protection


  1. Why change the oil?

Inherent properties of the engine oil tends to deteriorate during the combustion process inside the engine. So does the chemical components added to the oil to enhance these inherent properties. High temperature generated during combustion accelerates oxidation, formation of acids, soot, and wear metal debris. When you are advised to change the oil for certain period whether distance travelled or time, that means at that period the oil still possess enough lubricating properties but could be reduced significantly if the oil is used for extended period.

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