Top Oils provide top quality oil at the best possible prices. The heart of your car is the engine, therefore it is essential that you choose the correct oil to keep it running smoothly. The better quality oil, the longer it gives your engine the maximum protection. If you are in any doubt as to which oil your car requires contact us and we will advise you accordingly.

Filling your engine with a poor quality or incorrect specification of oil will drastically reduce its service life, in some cases within just a few miles!

The British Lubricants Federation issues a guidance leaflet with this clear message:
Choosing the correct engine oil can save motorists the price of many gallons of fuel a year in addition to prolonging service life.

This is why we only sell MOTUL Oil which is one of the top two synthetic oils available today. Motul Fully Synthetic Oils give the cold start protection that some Synthetic oils do not.

Apart from reducing wear and friction, lubricating oil provides four additional and very important functions:
It acts as a cooling medium;
It keeps the internal components clean;
It prevents corrosion;
It reduces noise.
Modern multi-grade oils are no longer a base product refined from crude oil. They are also a complex mixture of additives such as viscosity index improvers, pour point depressants, detergent dispersants. The excellent synthetic oils now being produced offer huge benefits over standard oils.
Oil specification is determined by two criteria namely Viscosity (thickness.) Most engine wear occurs during the critical moments following a cold start. High viscosity (thicker) oils circulate slower than low viscosity oils and the colder the oil, the thicker it will be. The Society of Automotive Engineers (SAE) classification system establishes the viscosity characteristics for the lubricating oil industry. All multi-grade oils are tested for two criteria i.e. maximum viscosity when cold (at temperatures as low as -40°F/-40°C) and secondly, minimum viscosity when hot (at 212°F /100°C). The first test is referred to as a Winter test, hence the W suffix which denotes the thickness (20W) or thinness (5W) of an oil during cold start conditions. The second test is designed to give a clear indication of the oils minimum viscosity during normal operating temperatures. As with the winter test, the higher the number the higher the thickness of the oil. To avoid confusion it must be noted that the methodology used for these two tests is entirely separate and bear no relation to each other. All oils get thinner (lose their viscosity) as they get hotter so dont be fooled into believing that say a 20W/50 oil gets thicker as it gets hotter - it doesnt! The type and age of an engine will also dictate which grades can or cannot be used and the manufacturers recommendations are paramount. Modern engines are machined to very close tolerances enabling them to use the extremely thin oils developed by the oil industry to improve fuel consumption and emissions. Using a thicker than specified oil in these engines will not only affect fuel consumption and emissions. Engines will be more difficult to start, hydraulic followers will over pressurise preventing the valves closing completely, and during cold start the oil will not reach all parts of the engine quickly enough, thus initiating premature wear! Conversely, older engines with their larger operating clearances demand the higher viscosity oils to achieve an adequate oil film thickness. Using a modern low viscosity oil in engines such as a X/Flow or V6 Essex could be a recipe for disaster with a danger that the oil film will break down in the bearings, allowing metal to metal contact to take place with the inevitable consequences.

Performance standards are currently laid down for three automotive engine groups namely: petrol, light duty diesel, and heavy-duty diesel. These standards are currently controlled by three main governing bodies i.e. the American Petroleum Institute (API); the Association des Constructeurs Europeans de lAutomobiles (ACEA); and the International Lubricant Standardization & Approval Committee (ILSAC). In addition to these organisations, individual vehicle manufacturers are increasingly issuing their own specifications (e.g. Ford, GM, VW, etc). Since the API & ACEA standards are universally quoted on oil packaging we shall discuss just these two in relation to petrol engines only. The API SL classification is the current benchmark for top quality petrol engine oils and all new engine warranties require a minimum SH specification of oil to be used. There have been improvements made to oil quality since the original SA standard was introduced and how significantly oil performance has advanced over the last 20 years. In 1996 a new European standard was introduced (ACEA) to improve the clarity of test programmes and assert minimum quality standards from the oil blenders. Below are shown the three specifications for petrol engines (A1;A2;A3) which are then suffixed by the year the standard was changed. Regardless of the age of an engine, any newer specification can be used providing the viscosity is correct. However, when you choose to use higher specification oil, the oil change period must never be extended. Nearly all the oil sold will have the API and/or ACEA classification printed on the container and, unless it is a very old vehicle, we would not advise using any oil below API SF quality (all ACEA standards meet or exceed API SF). If there is no API or ACEA classification on the container - DO NOT BUY.

ACEA Specifications For Petrol Engines:
A1 Low friction/low viscosity, fuel economy
A2 Standard performance level
A3 High performance &/or extended drain

Current Standards:
A1-98 Low viscosity/low friction meeting high performance extended drain requirements & complying with 2.5% improvement in fuel efficiency.
A2-96/2 Suitable for most current petrol engines requiring typically specified viscosity ranges and where fuel efficiency is not specified.
A3-98 High performance and/or extended oil drain interval and where fuel efficiency is not specified.

Synthetic Oils offer excellent value for money through state of the art technology. Synthetic oils offer advantages in most engines, particularly in respect of performance under extreme service conditions such as are encountered in turbo-chargers. Operating within such severe environments the high thermal stability and resistance to degradation of synthetic oils resists the formation of carbon deposits which not only affect performance but may ultimately cause an expensive turbo failure. In comparison to mineral based oils, synthetic oils not only offer advantages under high temperature conditions but also at low temperatures where their very good cold flow properties allow the latest 0W or 5W fuel efficient oils to be produced without encountering excessive oil consumption. Additional benefits of synthetic oil are:
Lower exhaust emissions - a factor of ever increasing importance in respect of environmental regulations and MOT tests.
Improved fuel economy - lower viscosity oils provide for greater efficiency.
Increased engine power through less internal frictional drag.
Improved heat dissipation - synthetics are less viscous than mineral oils
Better cold starting with improved oil circulation
Low phosphorous content prolongs the life of catalytic converters
Lower oil consumption - synthetic oils have a lower volatility than mineral oils
Purchasing synthetic oil however, is not always a simple procedure since there are several differing interpretations of the word synthetic and also the availability of semi or partially synthetic oils. These semi or partially synthetic oils are generally a mixture of conventional mineral oils with an undefined proportion of synthetic oils which can offer some of the advantages of 100% synthetics but never the full technical advantages. Whilst partial synthetics are excellent oils at a lower cost, if you want the very best engine protection your money can buy then insist on Fully or 100% synthetic - and check the label

Always follow the engine manufacturers lubricant specification for the minimum specification requirement.
Always renew the oil filter as part of the oil change.
For an initial fill in a replacement or reconditioned engine, it may be desirable to use a lower performance specification oil during the bedding-in period (typically 500 - 1000 miles). Synthetic and high specification mineral oils may inhibit this bedding-in process and result in excessive future oil consumption - check with the engine supplier. Change to a higher specification oil after completing the running-in process or as advised.
For older or high mileage engines it may be prudent to use an engine flushing additive or flushing agent to remove any accumulated sludge or deposit prior to filling with a high performance oil.
For cars equipped with catalytic converters the use of synthetic or high quality mineral oils with a low phosphorous content (less than 0.13%) is essential in prolonging the life and efficiency of these expensive components.

Acknowledgements:
The British Lubricants Federation
Graham Lord
Frank Sherlock
Peter Trott, Msc, MIDM.