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Clear, light-colored oil in the engine is often seen as proof of its good condition. In practice, however, the color of the lubricant is not a reliable indicator of its condition. Adam Klimek, TotalEnergies ambassador, explains why the decision to change the oil should take into account not only the vehicle’s mileage but also the passage of time.
Among drivers with low annual mileage, it is still common to postpone oil changes. The arguments are usually similar: the oil “hasn’t been driven much,” and it still looks clean on the dipstick. As a result, the change interval is sometimes extended to as long as three or four years.
However, appearances can be deceiving. Engine oil ages regardless of mileage. Over time, it oxidizes, absorbs moisture resulting from condensation, and binds to bio-components present in the fuel. Even with low mileage, after one year—and at most after two years—its protective properties may already be significantly reduced.
For this reason, vehicle manufacturers always specify the oil change interval in two dimensions: mileage and time. In older designs, running on earlier-generation oils, the limit was usually one year. In modern engines, using advanced oils, the maximum service life is usually up to two years.
LPG-powered cars – clear oil is an illusion
Special attention should be paid to LPG-powered vehicles. In these cases, the oil retains its clarity and light, straw-colored appearance for a long time. However, the absence of soot does not mean that the oil remains in good condition. LPG fuel can contain several times more sulfur than gasoline, which promotes oil acidification and accelerates its degradation.
That is why Adam Klimek recommends shortening the oil change interval in cars with LPG systems—in extreme cases, by as much as half compared to standard recommendations.
TotalEnergies oils tailored to various operating conditions
When developing its products, TotalEnergies takes into account the requirements of gas-powered engines. This means that vehicles with LPG systems can use oils that meet engine manufacturers’ approvals, drawing from TotalEnergies’ product range.
An example of an oil that performs particularly well in older designs, including those powered by LPG, is TotalEnergies Quartz 9000 NFC 5W-30. This is a synthetic lubricant designed for gasoline and diesel engines, including those equipped with exhaust catalysts. It performs well in turbocharged and multi-valve engines, in both city and highway driving.
Thanks to its high resistance to oxidation and excellent low-temperature fluidity, this oil facilitates cold starts in winter, ensures a durable oil film under high thermal loads, and helps reduce fuel consumption during driving and at startup. At the same time, it effectively prevents the formation of carbon deposits, varnish, and sludge, supporting long-term engine performance.
Summary
Another oil myth is debunked: oil color should not be considered an indicator of its suitability for continued use. A dark color does not always mean an immediate change is necessary, and light, clear oil does not guarantee that it retains its full protective properties. The key factors are the oil’s service life, engine operating conditions, and the manufacturer’s recommendations.
Watch the videos
Adam Klimek discusses this and other myths about engine oils in videos available on the official
TotalEnergies YouTube channel:
