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For some time now the insufficeint oil pressure warning comes on in my 5 year old pug petrol 1.4 307s. Its ok when engine is cold but as soon as it gets warm it comes on only when idling so at junctions i keep the revs at 850 and its ok anybody got any ideas.
 

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Possibly slight head failure. Any loss of fluids? Cross contamination of fluids. Could be a clogged oil filter or knackerd pump. Try changin oil filter and remove oil sump clean that out and check pump while at it see if that helps
 

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Could be premature wear due to poor servicing.

Before resorting to sump- off, drain oil, fit a quality oil filter (yes they do make a difference), and fill with a mediun-good grade Semi or Full synthetic oil with a higher lower viscosity rating. .
E,g. if your spec is 5-40 to 15-40, then choose 10-40 or 15-40.

With higher wear you really need a thicker oil to compensate - up to the limits recommended.


You tend to get oil pressure warnings with worn-out, cheap and thin oils.
 
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