If power steering is whining very noticeably, but not really leaking that much, should I chance it by adding Lucas stop leak to my pump?

I have purchased the "Stop Leak" by Lucas as well as the regular p.s. Pump fluid made by Lucas (that says that it is adaptable to ALL p.s. Systems, even Hondas). And have read the online reviews for both products on Amazon, and have some saying that the thick fluid of the "Stop leak" cause their steering system to blow, whereas most say that it works great and stopped the leak. But since I don't really have much of a leak (if it is leaking it is doing it very slowly), but have a noticeable whine noise… Should I chance it or not"? Why?

Added (1). I just want the whine to go away

Is this fuel cleaner good as they claim it to be? Will it do harm to my car?

My car is an 03 Honda Element 4 spd auto with 140,000. Miles. Before I get my expensive mechanical work done I'm doing a trail and error process of why my acceleration might feel sluggish. Recently I have changed the air filter and when I took it out, it had different spots of black sutte air the filter. After I've changed that, the engine definitely breaths better and is more responsive to the throttle inputs I give it off the line and at speeds close to top speed.
Spark plugs were replaced at 95,000 miles. What other maintenance factors should I take into consideration?

How fast should my 2003 Honda Element 4 speed AUTOMATIC abs able to go compared to the manual transmission?

My car is an 03 Honda Element awd 4 speed auto and one night I was driving on a long stretch of a highway on the interstate cruising 80 mph or so. Being a long and safe stretch that I'm fairly familiar of I went full throttle to see what my car could top out? When I hit the gas the car had no problem accelerating from 80 to 95 mph but once it hit 95 mph it slowly got up to 98 ish is something then it wouldn't go any faster. There's no way a 160 hp engine would be that weak to get a brick going any faster. I would think it should've been able to to 110- 120 mph before it becomes drag limited. However my truck has 140,000 miles(almost) and needs a new o2 sensor.

I KNOW this is not a performance vehicle but I would think any 4 banger should be able to do 110 mph. Hell, the white commercial vans are able to do 100 mph no problems and they are WAY non aerodynamic as my car!

What could be hindering my car from being able to do 110 mph? Clogged fuel filter perhaps? Any car should be able hit at least 110 if think. Also it makes me really frustrated when my car can't go that fast when I might need to go that fast.

My go kart will turn over but won't stay on?

I have a small engine, a honda 9.0 gx270, that starts fine, (used for a go kart) and stalls a moment later. I need to know how to fix it, but not sure of the cause. Could it be flooding? I thought a flood made it hard to crank. But it starts right up. Its not the spark plugs, i replace them weekly (i work in a go karting establishment.) it has a fresh air filter. I'm stumped honestly. Any suggestions or recommendations as to what it is and how to fix?

UPDATE: the kart seems to stay on after the engine has time to warm up, any new ideas? I've heard the carb and insufficient fuel, but does that have anything to do with the kart warming up? I'm a learning mechanic and i have lots if questions.