Hello, I have a 5.7L 98 Silverado with about 98K miles. The oil pressure gauge has been dipping down to about 32 whevener idling. It starts up at 50 and runs at about 42 once it's warm. Also I have been hearing the little ticking sound like it needs oil, while ildling, but I got the oil exactly at the top of the operating range on the dipstick.
Is the fluctuating oil pressure a cause for concern? I had it checked for other stuff lately and they didn't say anything about it, and said everything looks good to them except maybe some new spark plugs and wires.
The other problem is that the power steering goes out, most often, when in reverse and turning the wheel hard especially whenever backing up a trailer. It does it without the trailer sometimes too. I replaced a low pressure power steering hose and it fixed the leak, but it still gets hard and stiff sometimes at the worst possible times. The mechanic I took it to said there wasn't nothing he could find wrong with it, and he double checked it. He said all he could do is hook it up the computer tester and charge me alteast $75 for the hook up. Then as soon as I get back to the house the steering tightens up again.
I just realized that I have always used QuakerState SAE30, but they didn't have a case of it this time so I just got the QS 10w-30. Could this be the problem? If this is a problem. Thanks in advance for your help.
