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Hi Guys,

First post greatly appreciate any advice..

Hyundai accent rb 2014 1.6

Noticed oil was little low so added 500ml nulon fully synthetic oil think 5w 20.

Next day oil pressure light comes on and starts to run rough.

So did full oil change back to shell H7 semi synthetic. Noticed oil was dirty but no lumps or flecks .

Oil pressure light goes off so went out driving, car sounds lubed. after an hour low oil pressure light comes on.

Ran oil flush for two lots 30mins, no red light, engine sounds well lubed.

Go out for test run 30 mins , up to 80kmh, no red light, engine sounds great smooth plenty power well lubed.

On return briefly revved engine, sure enough 1 min later oil seems to stop red light on and tappet noise.

Could this be oil pressure relief valve or other? Driving me mad as on budget and need car to work.

Also can't find a service manual ...any one know where ...

Thanks kindly
 

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Use a Hyundai spin on oil filter (-35503 or 4),, and use a mechanical oil pressure gauge to inspect actual oil pressure,, possibly be a bum oil pressure switch
 
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