Oil smells like gas

Cory G · February 1, 2020

I have had my hp fuel pump fail on me at 40000ish kms and at 68-69000kms on my 18 Sierra 5.3L I’m still having issues with gasoline in my engine oil, my oil level is over the high mark on the dipstick and a strong smell of oil, my trucks at 73000kms, I had to bring my truck in at 71900kms because my crankcase was filled with gasoline and the dealership said it was because the intake tube past the MAF was loose from when they replaced the HP fuel pump at 69000kms. I’m bringing in my truck again for gasoline in my engine oil. They don’t seem to have any idea as to what’s going on and will not give me any type of extended warranty for my motor.. because having your crank case filled with gasoline is perfectly normal and extends engine life right? LOL

Ozer · February 6, 2020

Does fuel separate from oil when sitting? Like oil and water? Would be interesting to get a sample and have it sit on the shelf for a bit to see if anything separates

Patrick H. · February 6, 2020

I'm sure that gasoline totally mixes engine oil. It will cause excessive engine ware. The fuel system is under pressure when not running & if there is a faulty seal in the injection system, fuel can seep into the manifold, pass by the piston rings & contaminate the oil. My advise is take it to someone that is knows what they are doing to check it out & drive it as little as possible. This problem will destroy the engine in time.

Cory G · February 6, 2020

The trucks at the dealership again, they’re troubleshooting the issue, it’s been 4 times now and I’ve driven a lot with the crankcase filled with gasoline, I’d drive it until it would throw a code but I’ve been keeping an eye on it and have caught it twice before it throws the code

Ozer · February 10, 2020

On 2/6/2020 at 10:21 AM, Cory G said:

The trucks at the dealership again, they’re troubleshooting the issue, it’s been 4 times now and I’ve driven a lot with the crankcase filled with gasoline, I’d drive it until it would throw a code but I’ve been keeping an eye on it and have caught it twice before it throws the code

Look into the Lemon Law, if they cant fix the same issue after 3 times they may have to buy it back from you. Not sure if it has to be under warranty for that to work though, look into it for your state.