oil usage

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Mar 18, 2012 | 08:04 AM

#11

shipo

Senior Member

Joined: Nov 2008

Posts: 2,726

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From: southern New Hampshire

Quote:

Originally Posted by hxturbo

No leak, no smoke and vehicle just passed smog. Buddy thought that maybe catylitic was burning smoke/oil before it reached tail pipe. Very strange and I am stumped. I am going to go to dealer and ask question. Thanks guys.

I don't believe it is even remotely possible for a catalytic converter to burn off that much oil; if you don't smell burnt oil when the car is running, then I leaking is pretty much your only other option.

Mar 18, 2012 | 09:17 AM

#12

MazdaTirol

Senior Member

Joined: Feb 2012

Posts: 755

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From: Tirol, Austria

Quote:

Originally Posted by shipo

After thinking about it I am now not so sure it can also, the amount of heat needed to burn off that much oil would melt the cat to bits if it didn't plug it up first to where it wouldn't work.

Mar 19, 2012 | 08:08 AM

#13

Kevinkpk

Senior Member

Joined: Mar 2012

Posts: 444

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From: Tulsa

Quote:

Originally Posted by MazdaTirol

It is possible the cat is burning the oil but you would have blue smoke at startup when the cat is cold still, do they give you a readout of the HC PPM when you get the car smogged (tailpipe sniffer) or is it just the OBD II hookup?

Disregard text above SEE POST #12

The cat is there to super heat the exhuast as to burn any unburned hydrocarbons there might be. I'd suggest pull a couple plugs to check for any fouling, you need to isolate this to burning oil, or a leak.