Contraction/expansion of the various metallic parts of you car due to heating and cooling, particularly the exhaust.
If you hear it only at idle and sounds faint, it is your rocker shaft. They wear on the end and makes a slight ticking noise. Mine has done it for over 100k miles and no problems. I hope you have done reg maint and kept oil changed.
Check plug wires.. Spray them with water bottle and listen for miss or ticking. They are probably breaking down under a load..
You have driven 55.9234 miles.
It is probably the lifters. I suggest using an engine flush and I have had luck with GUNK. Follow the directions on the can. You may have to do it every 30000 miles . I found that if I put a non Mitsubishi oil filter on my pu would start making that ticking sound
If you drive for an hour, you have driven 45 miles. If you have driven for a longer or shorter time, you have driven more or less, respectively. You have to specify the amount of time to get the answer.
35 miles
because there are faster.
If the vehicle has over 100,000 miles on it, it may need a new timing belt and pulleys replaced. This may cause the engine to tick as it is moving out of timing.
21,000 miles
4500 miles
The average number of miles driven in the state of Idaho is close to 15,000 miles per year. Almost everyone has a car in Idaho.
Change it every 50k miles if not your car is a ticking timb bomb with a very short fuse if it fails it could bend valves or even cause your engine to seize