Seat Exeo Diesel Oil Pressure Warning

The oil pressure warning lamp illuminating is certainly cause for concern. The contamination you describe could stem from several issues, though exceeding the maintenance interval is a prime suspect. What does the oil color appear to be? Does it look milky, or excessively dark, and does it have an acrid smell? I experienced a similar issue with my previous Vauxhall Insignia, although the root cause was slightly different. Ignoring this could lead to catastrophic engine damage due to oil sludge accumulation.

Thanks for the quick response. The oil color is really dark, almost black. What do you mean by 'oil sludge accumulation'? Is that a serious problem?

Indeed, dark or black oil indicates significant degradation and potential contamination. 'Oil sludge' refers to a thick, tar-like substance that forms when oil breaks down due to heat, oxidation, and contaminants. This sludge can clog oil passages, restricting oil flow to critical engine components, and greatly increases friction. Given your symptoms and the oil color, I would strongly advise against driving the Exeo any further until it's been inspected by a qualified mechanic. Continuing to drive it could result in irreversible engine damage. An oil change and new oil filter might resolve the issue if caught early, but a thorough inspection is crucial.

I took the Exeo to the shop, and you were spot on. The oil change, new oil filter, and cleaning everything out cost me 165€. Hopefully, that's the end of it. Thanks for your help!