Ok i have a 2001 Dodge Dakota 3.9L with 82,000 miles on it. here's my problem

I'm getting fuel in my engine oil, I lost my engine because I got 5 quarts of gas in my oil in 100 miles (I sent a oil sample off and had it tested and it's fuel), I've rebuld my engine with new pistons, rings, bearings. I had my fuel injectors rebuilt and tested and they where good. my fuel pressure is good at 48-50 psi, im geting spark to all cylinders. I went to the Dodge dealer and they have never seen this before

If anyone know how i can still be getting fuel in my oil please help


Christopher