‘I’m a car expert – a common engine oil mistake increases fuel consumption’

Drivers have been advised that regularly spending a couple of minutes looking at their vehicle’s handbook could save them hundreds on their fuel bills.

At a time in which petrol and diesel prices are continuing to increase, many motorists are looking for ways to cut the running costs of their car.

According to the TikTok user @tobyvegad, drivers should always check that the oil they are buying for their car is recommended by the manufacturer.

He explained: “So, to begin with, the motor oil weight rating which is what you see on the front of the bottle could be more accurately described as a measure of viscosity. Now, in this specific case, this would be a measurement of how much internal friction there is resisting the flow of motor oil through an engine.

“So, if we take a look at honey, obviously it’s going to take flow a lot slower if you tip a glass of honey over as opposed to honey, so honey has high viscosity.”

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In the video, Toby explained that there are various types of motor oil, each of which features a rating that gives drivers an idea of its viscosity, or thickness.

Whilst most oils aim to be suitable to be used all-year round, thinner oils tend to give less protection in hot weather.

Thinner engine oils may also not be able to protect engine components from wear, meaning drivers are more likely to face expensive repair bills.

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However, Toby added that using an oil that is thicker than recommended could also cause damage to the engine, since it does not flow quickly enough to protect some of the parts.

“Furthermore, engines that have higher viscosity rated oils tend to require more energy to move or rotate the mechanical parts of an engine, such as a crankshaft.

“So, this is also why higher viscosity ratings result in lower efficiency and lower gas mileage. So yes, oil viscosity does impact the performance of your engine.”

The RAC has also warned drivers to never mix two kinds of motor oil, due to both varying viscosities and additives they may feature.

If a motorist runs a vehicle using two types of motor oil, not only could components get worn out at a faster rate, sludge and other deposits could build up.

Drivers interested in changing the type of motor oil in their engine are advised to always drain the old oil out of the system first, remembering to dispose of it safely.

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