i have a mixture of 50% oil & petrol in my engine on changing my oil. I noticed that my engine was running rough almost like it was running on 3 cylinders or that i might have air leak on carb or inlet manifold ?
If it has a manual fuel pump the diaphram has gone bad and letting fuel in oil sytem ........possably a bad fuel pressure regulator or a bad injector that is stuck open draining fuel in system ....
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.