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An engine oil leak that drips or runs onto the hot exhaust and the fumes find their way into the fresh air intake under the cowl area.

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Q: What is the Burning oil smell coming in through vents in the van?
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Why is there a smell of antifreeze and white smoke coming through the vents of your 1997 Toyota Camry?

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Why would my 2001 Ford Focus have a rubber burning smell coming out of the air vents when the car stops at stoplights at idle?

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Why does a smell like something is burning come through the vents for only a couple of minutes when the car is started in the morning?

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