Inside Line: Lucas Oils

Lucas has cleared up confusion in some workshops about whether to use a fully synthetic 5W30 or a 5W40 for certain models within the  207 range, as specified by some lubricant suppliers.

The differences in performance of the two oils is related to viscosity and operating temperature.

Lucas says it makes sense to use a 5W30 across the range because in colder areas for example, there will be fewer starting issues in winter thanks to thinner oil. The 5W40 oil is designed to operate in warmer climates and is more viscous than a 5W30.

As the 5W30 is specified for the majority of the range, garage workshops should not be concerned about substituting this in place of a 5W40. In fact, Lucas Oil says the results are as good if not better – especially if the 5W30 is a Lucas Oil blend. This is because the additive package included in all Lucas Oils is much more robust and offers a greater level of protection from dry starting, which is more common colder environments.

As most engine damage and wear takes place in the first few seconds after ignition, understanding the difference can be crucial.

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