BMW Repair: fuel and oil, fuel pressure regulator, independent bmw

Question
I have a 1988 735il that has gas mixing with oil and will not go over 20 mph.

Answer
Somewhere raw fuel is getting into the engine, most common thing i see is the fuel pressure regulator letting fuel pass by the diaphram into the vaccum hose,or an injector stuck open.... There are allot of things that can cause, do not drive car this will thin out your oil and damage the engine, i recomend takeing your BMW to A good Independent BMW repair shop.  Thanks Nathan BAbbitt (babbitt Motor Werks)