Q: Does my engine oil need to change colour after prolonged use?
A: A good engine oil is supposed to have detergent properties just like your domestic detergent in order
to be able to keep your engine clean and sludge free. If the colour an engine oil does not change with
use, it has poor detergent and dispersant properties and hence not cleaning your engine properly.

Q: Is a thicker Oil always better for my engine?
A: The viscosity (thickness) of an engine oil does not need to be too high for good performance.
Adequate viscosity at all operating temperatures is what is required. Our Multigrade Oils have high
capacity to retain their viscosity with change in temperature hence they lubricate well at low as well
as at high temperatures. Too thick Oil could cause excessive drag, increased fluid friction & heat generation,
poor fuel economy and hence power loss in your engine.

Q: How often do I need to change my engine oil?
A: This may vary from one car manufacturer to the other. You can know when to change the oil by
going through the vehicle manual and checking under maintenance; lubricant section.

Q: Do I need to add ‘Oil treatment’ to my engine Oil?
A: All our engine oils are already treated and fortified with additives and hence need no any addition of
oil treatment before use.

Q: Do I need spend ‘much’ on lubricants when I could use cheap Oils (base oils) that abound?
A: Quality lubricants are made up of good quality base oils and selected additives that impart desired qualities necessary for good engine protection and performance. Base Oils contain no additives and hence can not protect your engine adequately. Increased wear, sludge buildup would lead to reduced engine operational life span. Good engine oils are definitely cheaper than total replacement of your engine that would eventually result from usage of Cheap (base) oils. It is therefore costlier using base oils for your engine lubrication needs.

Q: What are Multigrade Oils? What are Monograde Oils.
A: Multigrades: These are oils that can be utilised aver a wide range of temperatures- our Engen Super 20w/50 is Multigrades of SAE 20W-50.
Monogrades: These are oils that have limited operational temperature range eg SAE 40.

Q: What is API and what does API SM means?
A: API means; American Petroleum Institute. It classifies lubricants based on level of performance.
The ‘S’ category (for gasoline engine Oils) spans from SA to SM- the latest performance level for
gasoline engine oils. The “C” category (for diesel engine oils) spans from CA to CI-4 for the diesel
engine oils. The higher the associated alphabet, the better the performance. Thus API CF is
higher than CC, while API SF is higher than SC.
An API SL/CF means it could be used for both gasoline and diesel engines at respective
performance levels specified. Our top of the range engine oil ie Engen Super and Dieselube 700
Super are API SL and API CI-4 Plus respectively, the most advanced lubricant performance levels
available in Nigeria.