Hey all, reader of both groups, hoping someone can help.
I have a 91 cougar XR7 5.0L HO that has recently started showing low oil pressure on the gauge. Needle used to read straight up-and-down between the R and the M of NORMAL, now the needle sits at the N or lower. Sometimes it will go to about the O but that is as high as it ever gets. Most recently it is a N or lower. I was running 5W-30 with 1/2 a quart of Marvels, I've since changed the oil to castrol 10w30 only, still no change. Next stop is a new sending unit. I tried cleaning the connections but couldn't get to the connection inside the wire clip, too tight in there. I know that these electrical gauges can be iffy if the connections aren't clean, should I be worried? Looks like many in the 'stang NG have seen this with no real issues. Engine has 160K on it but runs great, no noises and still a ton of power. I might occasionally have to add a quart between changes, but not often if at all.
Any ideas?