Can anyone please put my mind at ease, I have a 1990 ZX TT with around 55000 miles on the clock and recently the oil pressure guage has been dropping too almost 0 on tick over when hot. It goes up when I drive normally but only goes up about a third of the way staying under 4 all the time. The oil is new Castrol Magnitec and it's had a new filter very recently. Can anyone tell me if I should be worried. The engine still sounds smooth and quiet with no knocking etc.

 

Have a look below, there was just a thread on this topic recently and many others I am sure if you do a search.

..Dan