Oil pressure problems...

[Mike Foye]

First off yes I checked and used the search tool. I am having oil pressure issues. The motor has about 1000 miles or so on it. Its the 235.5. While driving it is running about 40 psi and unless I gear down and run out the gear before I stop she loses oil pressure. On start up she has about 20 and at any other idle she is normal. The only time I have issues is when I am driving and push in the clutch and dont run the gea down.

I am running 15w40 rotella