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TomG2

Central Illinois

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Posted: 01/14/21 08:14pm Link  |  Quote  |  Print  |  Notify Moderator

I see on another forum where owners report of showing more oil on their dipstick at the end of a long hard drive than at the beginning. Mostly with turbocharged engines. Anything to this or explanation?

colliehauler

Mc Pherson KS USA

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Posted: 01/14/21 09:13pm Link  |  Quote  |  Print  |  Notify Moderator

Possible fuel contamination? Or simply thermal expansion?

Gjac

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Posted: 01/14/21 09:30pm Link  |  Quote  |  Print  |  Notify Moderator

Turbo charged engine have higher fuel pressure than naturally asperated engines and fuel can sometimes leak past the rings. Some Honda CRV's had this problem for a while.

time2roll

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Posted: 01/14/21 09:45pm Link  |  Quote  |  Print  |  Notify Moderator

Drive it normal a few days and check again would be telling. That or immediately send an oil sample to the lab.

https://www.blackstone-labs.com

Or we can just speculate...


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stickdog

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Posted: 01/14/21 10:15pm Link  |  Quote  |  Print  |  Notify Moderator

Your more likely to have fuel wash in the oil with long idling as the engine never reached operating temp.


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TomG2

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Posted: 01/15/21 04:11am Link  |  Quote  |  Print  |  Notify Moderator

stickdog wrote:

Your more likely to have fuel wash in the oil with long idling as the engine never reached operating temp.


We used to have this with air-cooled VW's back in the day. They would not get warm enough in Midwestern Winters.

The comments I saw recently concerned towing.

bucky

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Posted: 01/15/21 04:56am Link  |  Quote  |  Print  |  Notify Moderator

Leaking injector. Smell the oil.


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NRALIFR

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Posted: 01/15/21 05:26am Link  |  Quote  |  Print  |  Notify Moderator

That’s a very common problem on Diesel engines that were manufactured from about 2007-2010. They typically had diesel particulate filters (DPF), but did not use diesel exhaust fluid (DEF). They relied heavily on exhaust gas recirculation (EGR) to control oxides of nitrogen (NOx), and as such, cleaned or regened the DPF frequently. Sometimes as often as every 75 miles or so.

Most, but not all, of the Diesel engines of that era started the regen process by over fueling the engine on one or more cylinders, causing unburned fuel to flow into the exhaust where it would then be ignited inside the DPF. That over fueling also caused fuel to get past the rings into the crankcase, and is what resulted in the engine “making oil”.

I had one of those engines in a 2010 F450, the 6.4 L Powerstroke. I absolutely loved everything about that truck, at least initially. I learned to absolutely hate the engine though. I owned it for a little more than three years, and I always drained out about a quart more oil than I put in. Top-end valve train failures were an issue with those engines, though I never experienced that myself.

Ford had a TSB for the 6.4’s to check for excessive fuel in the oil that involved pulling the dipstick, wiping it clean, then replacing it just to the point where the plastic pull ring at the top of the dipstick started. That was at least an inch higher than if you fully seated it in the dipstick tube. As long as the oil level wasn’t higher than the top line on the dipstick, all was supposedly good and there was nothing to worry about.

I got rid of that truck before it caused me much financial pain.

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rhagfo

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Posted: 01/15/21 06:01am Link  |  Quote  |  Print  |  Notify Moderator

bucky wrote:

Leaking injector. Smell the oil.

time2roll wrote:

Drive it normal a few days and check again would be telling. That or immediately send an oil sample to the lab.

https://www.blackstone-labs.com

Or we can just speculate...


It is usually fuel contamination, which can have many causes. I have my oil analyzed at every change at Blackstone Labs.


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2oldman

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Posted: 01/15/21 08:36am Link  |  Quote  |  Print  |  Notify Moderator

NRALIFR wrote:

That’s a very common problem on Diesel engines that were manufactured from about 2007-2010. They typically had diesel particulate filters (DPF), but did not use diesel exhaust fluid (DEF).
That's what I have, and this truck does not go grocery shopping.

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