Oil Smells like gas - JeepForum.com
 
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post #1 of 10 Old 06-17-2008, 05:35 PM Thread Starter
jbrink
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Oil Smells like gas

I just switched to synthetic oil a few weeks ago and now it seems like my oil smells like gas. Another thing it seems like my oil pressure is a little higher when I first start up the engine. I put in 10w30 because it's summer. I don't know if that may have something to do with it. Any ideas or suggestions?

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post #2 of 10 Old 06-17-2008, 06:24 PM
pigoo
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Quote:
Originally Posted by jbrink View Post
I just switched to synthetic oil a few weeks ago and now it seems like my oil smells like gas. Another thing it seems like my oil pressure is a little higher when I first start up the engine. I put in 10w30 because it's summer. I don't know if that may have something to do with it. Any ideas or suggestions?
Don't know your vehicles mileage...but worn but engine wear can allow oil & fuel to mix to a degree.

I would say that your oil smelling like gas was probably present before you used the synthetic oil...you just so happened to notice now with your most recent oil change.

- Nick
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post #3 of 10 Old 06-17-2008, 06:44 PM
ratmonkey
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it was bad valve seals on my 318, could be rings as well though.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #4 of 10 Old 06-17-2008, 07:13 PM
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Could be numerous things, the 2006 raptor 700's are notorious for this, and no one can find the problem; and also nothing bad has happened.
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post #5 of 10 Old 06-17-2008, 08:54 PM
Chrisca
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Quote:
Originally Posted by jbrink View Post
I put in 10w30 because it's summer.
Instead of 10W-40?
If you change weights, you would change to heavier (10W-40) in the summer.
The 1st number is the viscosity at colder/startup temps and the 2nd number is the viscosity at operating temp.
Hotter in the summer means thinner oil.

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post #6 of 10 Old 06-18-2008, 08:32 AM
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Could it be a leaking throttle body; leaking fuel that's washing past the valves and rings and mixing into the oil?

Is it showing signs of being overful of oil? That would tell you how serious it is. If it's not overful by much, it can't be much gas.

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post #7 of 10 Old 06-18-2008, 11:25 AM
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Quote:
Originally Posted by Coletrickle View Post
Could it be a leaking throttle body; leaking fuel that's washing past the valves and rings and mixing into the oil?

Is it showing signs of being overful of oil? That would tell you how serious it is. If it's not overful by much, it can't be much gas.
There is no fuel into the TB, its all injected in the head (multi-port fuel injection).

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post #8 of 10 Old 06-18-2008, 12:09 PM
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oops, sorry. What I should have said is what about a leaky injector?

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post #9 of 10 Old 06-18-2008, 12:12 PM
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Chris makes a good point. The use of a more thin (thinner?) oil in summer is exactly backwards to what you'd want to do.

Given that it is synthetic however, the change in viscoscity in varied temperatures is less an issue than with conventional.

A compression check will tell you about the issue being with cylinders & valves sealing well enough.

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post #10 of 10 Old 06-18-2008, 04:45 PM
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does it seem to be missfiring? Could be a bad spark plug.
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