Engines may look the same but their formulations differ wildly
The consequences of slipping up
OILS & ADDITIVES
Although performing oil changes is reasonably elementary, the lubricant itself is immensely complex. Therefore, Rob Marshall looks into the latest developments affecting the engine lubrication market and the consequences of technicians not keeping up-to-date.
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While the main engine oil functions are well-understood by technicians, it is still quite magical that they maintain their cooling and lubrication properties within the environments of low viscosities, higher temperatures and extended drain intervals. Yet, the oil's protective properties extend beyond the power unit. Certain anti-wear additives may be life saviours for the engine but they can be fatal for the catalytic converter, or DPF. As an example, Lucas Oil blends its engine oil in 10w-30, 10w-40 & 20w-50 viscosities, which contain high levels of zinc, molybdenum, and phosphorus to offer maximum engine protection for muscle, showroom, classic and trophy cars. As Lucas Oil admits, these formulations are more specialised applications, making them unsuitable for modern vehicles equipped with catalytic converters, or DPFs. In addition, some of the latest engines may be prone to specific issues, such as intake coking, and the car manufacturer may specify a particular engine oil additive formulation to minimise the effect. These are reasons why engine oil has become increasingly bespoke and why both owners and technicians have to be sure that they make the right choice.
Consequences of owner neglect Many technicians remain surprised about how badly certain owners neglect their cars, many of whom cannot even be bothered to check their levels. Even oil companies are trying to communicate this to the public. As an example, Castrol's Oil Check Challenge seeks to raise awareness and encourage workshop visits.
Getting the oil right is not easy for newer vehicles. Prioritise manufacturer specifications over viscosity and API/ACEA ratings
