I have a1989 r model dump truck with a em6-300L motor. I checked oil the other day oil was high drained about a gallon out of oil. Sent oil sample off came back 4.5 percent fuel in oil. Truck runs great fires up as soon as it turns over. I did find one injector line that look like it was leaking fuel at head not dripping just wet around line at head. I read that o-rings around injectors could be leaking is this possible or should I look at injector pump. If anyone could point me in right direction I would appreciate it thanks
