Could Your Sluggish Diesel Engine Be Suffering from Oxidation?
If you have been having problems with your diesel-engined vehicle of late, with a sluggish engine and markedly increased fuel use, there are many different potential culprits. Yet one of the most commonplace in this situation is a condition known as "oxidation." What is this, how is it caused, and what can you do to treat it?
When Oxidation Occurs
Oxidation takes place when too much oxygen gets into the oil mixture or when internal temperatures get too high. It is particularly common in a diesel-engined vehicle that is not used very frequently or has been left to sit in one location for a long period of time. Some people notice this problem when they return from a long holiday and find it hard to coax their car into compliance.
Oil Degradation
Once the oxygen gets into the oil, it will create miniature bubbles that will, in turn, cause the oil to become thinner and less potent. If the oil is not performing as it should, then it cannot protect those moving parts as effectively, which could lead to damage from friction and the risk of corrosion.
Sludge and Increased Viscosity
Once the oil is oxidised, it can change its consistency and may take on a very dirty appearance, with a lot of "sludge." These deposits will also increase the viscosity of the oil and lower your car's fuel efficiency. This explains the higher fuel bill at the service station.
Heat Damage
If your vehicle is also equipped with a turbocharger, you may be at increased risk of oxidation, which can develop with higher temperatures. After all, turbochargers build up a lot of heat automatically, which is difficult to avoid.
Oil Change
If you are suffering from oxidation, the first thing to do is to change the oil and flush the system. You may find it beneficial to use a synthetic lubricant, which has been specially formulated to prevent oxygen from attaching to its molecular structure. A synthetic oil may not contain as many contaminants as a conventional product either, which may also help to reduce the risk of oxidation.
Diagnostics
You may also find it helpful to get a full diesel diagnostic check from a mechanic. If oxidation is at the root of your problem, they will advise accordingly, but if they find anything else at the same time, they will be able to take care of that too.
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