I have pressure tested my oil cooler to 80 pounds of air......My question is what is acceptable leak down amount......It has lost ten pounds in two days......One side is a schrader valve and other is a gauge....

Leak down is an odd way to test your cooler. If it were a cooler I was scrutinizing I would submerge it in water, pressurize it and watch for any sign of air bubbles. If found, replace the cooler. There should be no leakage.

I did that already......It is not a leak down test..... the question is what is a acceptable amount of air loss through fittings........I need input from someone who has done oil cooler testing....

there should be no leak down. check with soapy water whilst holding pressure

I was hoping you would chime in wobble.....It is weird i threw the whole thing in my hot tub and not a bubble, but after two days it has lost ten pounds of air, i think it is pushing through the threads real slow...I hate to risk it though....

I've done lots of oil cooler testing. You should not have any leaks.

that is strange, try a different gauge

actually, soapy water may show a leak that you might otherwise not see, that includes the gauge

You're going to have a leak in your ass if your wife finds an oil cooler in the hot tub!

I was going to suggest the bath tub, white background may be better for seeing bubbles

I SECOND THAT ON ALL ACCOUNTS !!!!