I have a 1992 cadillac with a 4.9 engine. i found gas in the oil today. what could cause this to happen?

Everybody said the fuel injectors, the problem with this answer is that a 1992 Cadillac has throttle body fuel injection, you are getting more gas than you need,the motor is probably running real rough or not idling very smooth, that is because your EGR valve needs to be replaced. Try this first this is what is letting raw gas build up on top of your cylinders and letting gas get in to your oil pan! Good Luck!I have a 1992 cadillac with a 4.9 engine. i found gas in the oil today. what could cause this to happen?
I had one of these cars actually it was a 91 but still the same car and sold it running fairly well at 250,000 miles. One thing I can think of is a leaky injector a sign of this is long cranking starts. If it takes the car several seconds to actually fire up when cranking it after sitting for a half an hour or so this is a good indicator. A leaking injector usually won't cause running problems. If the car is spewing black or even white smoke when you give it gas this could mean you have a mixture problem. Some people think that white smoke out of the exhaust is only coolant but sometimes it can be raw fuel. Black smoke is partially burnt fuel and white can be unburnt fuel caused by a severely rich mixture. More than likely it's a leaking injector though. One way to test this is to turn the key to run then back off and after 15-30 mins push in the valve that is in the fuel line port. I can't remember exactly where the port is but it should be on the fuel line on top of the motor near the injectors. If there is no pressure when you push the valve in then it is possible you have a leaking injector. The line should stay pressurized for around a half an hour at least before the fuel pump may let it leak back to the tank. Some will even hold pressure all night depends on age and car.I have a 1992 cadillac with a 4.9 engine. i found gas in the oil today. what could cause this to happen?
Are you sure it was Gas ? or just the odor of gas. That is normally a pretty good motor. I think you probably need to change the plugs, change the oil and filter, and maybe also the plug wires.





If you are smelling a lot of un-burned fuel in the oil, you are running too rich. Either the plugs aren't firing, or the injectors are off calibration, or the choke is sticking.
Not sure on Caddy's but I have had the fuel pressure regulator stick on a six cylinder Ford and it filled the crank case with gas.
Revving it just before shutting it down. Defective fuel injector. Stuck valve. Bad rings.
I'm thinking bad rings, worst case scenerio warped head good luck