I have a 2001 Sebring v6(2.7l or 3.0l) and i have the same question. When im driving 80 mph im at 3,000rpms. From what i have been reading it sounds normal. I just got the car and used to drive a 2001 F-150 v8 5.5l. So the difference in sound is huge, like im running the engine too hard.
around 3000 rpm is a safe bet. It would help if you described the engine ( 4cyl / 6 cyl / 8 cyl.. 2700 - 3000 is safe....
About 2300 to 2450 RPM (In that range) At 70 it should be around 2100 RPM.
Mine is between 500 and 600 rpm's after the engine is warmed up.
The computer will set idle between 600 and 900 rpm depending on load and temperature..
You need to check the oil pressure with a mechanical gauge.
check the fuses.
2500
Out 2000 Dodge Neon does 2500 rpms at 60 mph. Grace
The odometer unit has failed and will need replaced.
12 mph
A likely cause is a failing instrument cluster.
How many rpm should the engine turn at 80 Mph 2007 Hyundai tiburon