When oil turns into gas, there is less oil.

Does the subject want to ask "why is there less oil after changing oil to gas"?

1. The exhaust gas produced by gasoline and diesel combustion contains a lot of hydrocarbons and particulates, which will form carbon deposits and sediments inside the engine, leading to accelerated oil pollution and increased parts wear. As a clean energy source, natural gas contains less harmful substances in the waste gas produced by its combustion, so the pollution to engine oil is relatively small, and it is normal for engine oil to be reduced.

2. After changing oil to gas, the engine burns natural gas, so there are relatively few harmful substances in the exhaust gas generated by combustion, carbon deposition and precipitation inside the engine will also be reduced, and the pollution degree of engine oil is relatively small, so the service life of engine oil is relatively prolonged and the consumption of engine oil will be reduced accordingly.