2005 Mercedes-Benz CL65 AMG Long-Term Road Test

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2005 Mercedes-Benz CL65 AMG: Consuming Oil?

January 29, 2014

2005 Mercedes-Benz CL65 AMG

I recently read an update James posted mentioning that our 2005 Mercedes-Benz CL65 was low on oil. It was down about a quart at 58,500 miles, so he added as much. Here we are, 500 miles later and I get a warning that the Mercedes is low another quart-and-a-half. Curious, I looked around...

2005 Mercedes-Benz CL65 AMG

I noticed this mess on the oil filler neck, which didn't necessarily seem excessive. Still I wiped it clean so we can check back on it later. There aren't any oil drippings beneath the car, either. Maybe it is normal for this engine to burn a little oil? Over a quart every 500 miles can't be normal, though. Maybe it stems from the electronic measuring process? There is a chance our technique is off, but I kind of doubt it. Or, maybe I'm nuts. There is an answer someplace that I can't quite put my finger on.

Mike Schmidt, Vehicle Testing Manager @ 59.045 miles

Most Recommended Comments

By benson2175
on 01/29/14
6:39 PM PST

My old E class would loose oil like crazy every time I took it on the hwy. Same thing; oil round the filler. Turned out it was the rubber o-seal of the oil filler cap. You can pick them up for about a $1. Once I did that, stopped loosing oil.

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