By engine temp and the gauge you mean water temp, have you checked your coolant recently to see if it's full, look at the overflow as well, also if you haven't flushed your radiator recently give it a go, mines always in the middle and never see's anymore than 80 degrees according to aftermarket gauge I found out the hard way once it was rising but when your cruising it goes back to normal, then when you leave it to idle it rises, I checked 2 things .. Leak in radiator and water pump turned out to be hole in radiator about 70 bucks to repair
But I've got aftermarket radiator so yeah temps can drop to 70 while cruising