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Colin Aitchison · 07-09-19, 04:19 AM

I'm with Mike, 1.8 bar at idle with a hot engine is around the norm, you are looking for the pressure to rise to above 4.0 bar in 5th gear at 2000 rpm when driving, when driving the engine hard the oil pressure should rise even more, now onto oil, you will get many different views on what oil to use, I don't use modern type oils as these oils were not about when this car was new, stay away from 0w30 and 5w30 oils stick to 10w40 or even 20w50,
photo below of WR engine owner manual, you will notice at the bottom left the VW standard oil specification of 500.00. Also gearbox and rear differential oil specification on the top right that may be the same for your car, please ignore the power steering fluid specification as I am certain it is different for your car.

07-09-19, 04:19 AM	#6
Colin Aitchison Senior Member Classic Audi Club Member Join Date: Dec 2013 Location: Back home in Tillicoultry Posts: 1,308	I'm with Mike, 1.8 bar at idle with a hot engine is around the norm, you are looking for the pressure to rise to above 4.0 bar in 5th gear at 2000 rpm when driving, when driving the engine hard the oil pressure should rise even more, now onto oil, you will get many different views on what oil to use, I don't use modern type oils as these oils were not about when this car was new, stay away from 0w30 and 5w30 oils stick to 10w40 or even 20w50, photo below of WR engine owner manual, you will notice at the bottom left the VW standard oil specification of 500.00. Also gearbox and rear differential oil specification on the top right that may be the same for your car, please ignore the power steering fluid specification as I am certain it is different for your car.