What is the recommended oil and oil pressure of a 1994 Chevy Z71 with a 350 and a lot of miles?

Answer 1

Just answered this issue for my daughter-in-law. She has a 94 Z71 with 204000 on the clock but was fitted with a new engine in 2001. Maybe has 50,000 on the new motor, I didn't check.

She changes the oil every 3,000 miles but otherwise does nothing. Widows are so not into it.

This past week she called with a problem. Changed the oil again but noticed the temp gauge was higher than normal (about 225 usually) and the oil pressure dropped to almost the red line (on the low side) at red lights.

What's a father-in-law to do? Give up some time on the holidayweekend of course. Comes with the territory. If the son was alive and functioning I'd never hear about it right?

So I think about what she told me. "Dad, I change the oil every 3 thou, like religiously." (Yeah, right. This is the gal who can't remember to pay the phone bill on time). OK, I believe her, she changed the oil and all hell broke loose. Happens all the time .....right.

I bought a new oil sender unit and installed it. Checked the pressure- 40 at start up, cold. Drops to 25 - 28 when hot. AOK in my book. Now we wait and see. Bought a pan gasket set in case.....we wait and see.