Oil aging or oil oxidation plays a decisive role in assessing how long a gas engine oil can still be used or whether an oil change is necessary. Longer oil operating times, higher operating temperatures or rising contamination increase oil oxidation and thus the formation of deposits and acid reaction products. Oils from gas engines that are operated with biogas, landfill gas, sewage gas or even wood gas often still have to cope with stronger acidic components from the gases. Since the composition of these gases often varies greatly, even an oil change at fixed intervals can become a risk, in contrast to the relatively clean natural gas. In accordance with many manufacturers' regulations, oils from biogas, sewage and landfill gas engines in particular must therefore be monitored using ongoing lubricant analyses.
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