gas smell

[blue_2001]

last night i changed my oil. the oil smelled like it had gas mixed in it. andbody have any ideas. if it helps ive only been gettin like 22mpg

[Blue ZX2]

Rings are worn out and gas is getting past them, getting into the oil.

[5spdzx2]

If thats the case, which it possibly could be, that sucks. Lets hope your smellin things.

[gold_member]

Now, me and the mad scientist got to rip apart the block and replace the piston rings you fried.

[mcar451]

fast and furious lol

[gold_member]

it may be the first fast and furious quote on the new site

[5spdzx2]

haha. good stuff

[blue_2001]

wouldnt i be burning oil too?

[zxtwou2]

it may be the first fast and furious quote on the new site

definitely not...

anyway...if there is a place near you that can do a viscosity test on your oil, you can see if it has fuel in it. there are a few methods, but the way i prefer is to use a falling-ball viscometer. you have two vials of oil...one clean, one dirty (from your sump.) make sure the clean oil is the same type and weight as the oil you are testing. use it according to the instructions, and you can see what percentage of either thickening or fuel dilution you have. thickening is normal...and oil should be changed anywhere between 20-40% thickening. anything over 5% fuel dilution is bad, though. the real danger with having fuel in the oil is a crankcase explosion..basically blowing the engine block up. it's not as big a problem as on diesels, but it's still a threat. if you do in fact have fuel in your oil, you most likely have piston rings that are allowing blow-by...in other words, they are allowing the contents of the cylinder to pass by and enter the sump. get it checked out, and get your compression checked as well (you can usually do this at AutoZone by pulling the spark plugs off the coil...pulling them one at a time out of the cylinder and using the tester.) if you have a noticable loss in compression you probably need to replace the piston rings on that piston...but if you replace one, i suggest replacing them all for good measure.

[ChillinZX]

or you can redneck test it, see if it will light on fire.

[zxtwou2]

that won't always tell if there is enough fuel in his oil to at least thin it down and break down the lubricative properties...that will just tell him if there's enough to make it blow up. even as little as 5% fuel dilution might not be enough to combust...but it will prevent the oil from lubing properly.

[blue_2001]

i would still think it would be burning oil

[zxtwou2]

not always. if the rings were completely gone, maybe...but if he's blowing down just a little bit, he'll still get fuel, since not only is it being forced down, the oil would have to be sucked up. it's a lot harder for a MUCH more viscous material to be sucked UP than a fairly thin fuel to be blown down.

[bigperm5901]

can you feel a difference in how your car runs if it blows a ring.

[mechtech]

Usually gas in the oil is because of a too rich mixture condition, not bad rings.
There are umpteen jillion cars with bad rings that blow oil, but no fuel dilution problems.
It is a separate problem.
Actually, I never heard or saw bad rings connected with fuel dilution. So don't believe everything or everyone you read here.
Maybe you fuel pressure sensor is bad, or your O2 sensor.
A leaky injector is also likely.

[blue_2001]

i had someone say a bad injector. plus my car idles a lil rough so maybe this is the same problem. since i have no check engine light how do i test the sensors

[ChillinZX]

I had a slightly leaking injector and never noticed it until I swapped my injectors out.