About a needle over fifty is exactly where my guage hovers. Assuming that since it has been there from the beginning, that is what it is supposed to read. I changed to a synthetic oil and HD filter, same/same............ who knows?
Regarding your previous post on loss of power..... I had the exact same senerio that would come and go periodically until it just went. I would tap on the guage just like you did......... feel okay that you are not the Lone Ranger. Not sure if it could be the same or not, my problem ended up being a surge guard about the size of a small cigar located on the passenger side of the motor. It protected the engine ECM, and every time it would act up, I would loose the boost on the turbo. It was a simple inexpensive fix, and determined by the code saved form the idiot light. Since, I carry a spare.
Walt / Julie Darden
2004 Alpine 40FDTS