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Maintenance How To's

Frequently Asked Questions

  • Monograde oil protects your engine at operating temperature.
  • Multigrade oil protects your engine at both low temperature (start-up) and operating temperature.
  • With a Multigrade oil, when you start your engine on a cold winter’s morning, the oil is “thin” enough to be quickly pumped to critical engine parts to protect them, and when your engine reaches running temperature the oil is still “thick” enough to continue protecting these critical engine parts.
  • For more information download the info sheet:

The advantages of multigrade oils are:

  • All year use throughout summer and winter.
  • High temperature performance.
  • Reduced start-up wear.
  • Easier start-up & less battery drain.
  • Improved fuel economy
  • Synthetic oils are chemical compounds that are artificially made whereas mineral oil is a distillation product of petroleum sourced from crude oil.
  • The basic difference between the oil types – apart from their origin – is their molecular and particulate structure.
  • Synthetic oil having an even and uniform molecular structure whereas mineral oil contains uneven and less uniform molecules. Synthetic blends use a combination of synthetic and mineral oil to impart some of the beneficial properties of synthetic oils but are not as costly as a fully synthetic oil.
  • The finished product is a combination of the base oils and the additive package (deposit shield technology) that gives the oil the performance benefits to protect modern engines.
  • Fully synthetic oils offer the best protection, while synthetic blend oils offer better protection than mineral oils.
  • For more information download the info sheet:
  • Higher viscosity index.
  • Lower pour point.
  • Better fuel economy.
  • Extended service intervals.
  • Better high and low temperature viscosity performance.
  • Increased engine protection and wear from lower friction.
  • Better oxidation control.
  • Reduced engine drag and increased power from greater resistance to oil thickening.
  • Better shear stability.
  • Decreased evaporative loss.
  • Havoline engine oils with Deposit Shield™ Technology are specially designed to protect against oxidation, corrosion and thermal breakdown which leads to sludge.
  • Havoline’s strength and durability give your engine optimum power and performance, protecting it against wear, and harmful deposits.
  • An antifreeze / coolant prevents freezing and over-heating.
  • A good quality coolant increases the boiling point (it will boil at a higher temperature) of the cooling fluid and lowers the freeze point (it will freeze at a lower temperature) of the fluid as well.
  • Antifreeze / Coolants are made up of a mixture of water, ethylene glycol and corrosion inhibitors.
  • There are various types of coolants available.
  • Some are known as “Traditional” coolants.
  • Others are known as “Hybrid” coolants.
  • Some are Organic Acid Technology (OAT) coolants.
  • OAT coolants are also known as Long Life Coolants.
  • No.
  • Water should not be used to top up the cooling system.
  • Water contains chemicals which build scale and contributes to rust and corrosion in the cooling system of the engine.
  • It also freezes at 0°C and boils at 100°C, so does not provide good enough protection for the vehicles engine.
  • If the cooling system contains a coolant already (any type), topping up with water will dilute the concentration and effectiveness of the coolant.
  • The colours of the coolant are just dyes.
  • Generally the traditional coolants are dyed green or other dark colours.
  • The Hybrid and OAT coolants are generally dyed red, pink or orange, but may appear in other colours as well.
  • Havoline Xtended Life Antifreeze / Coolant is orange in colour.


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Whatever your business or industry, Caltex Lubricants can help improve operating efficiency and profitability through delivering advanced technology, high quality lubrication products and customised services.

Astron Energy Customer Centre

0860 030 0860