2017 Expedition 3.5 Ecoboost with just over 70,000 miles on it. Most recent numbers indicate that I went through 1.5 litres of oil in a 350km (220miles) round trip on the hwy @ 60 miles an hour towing an enclosed double wide snowmobile trailer. Trailer can’t weight more than 3000 lbs loaded but is basically a giant sail. Where the heck is the oil going to and how’s it getting there? No puddles on ground, neither the bottom of the truck nor the trailer is covered in oil, my exhaust pipe is blacker than normal to the point where it did get on my white bumper but no plumes of smoke nor smell of oil burning.
Background on this, noticed I was down about 1 litre of oil a couple weeks ago about 3000 miles after last oil change. Since I was going to throw a litre of oil in anyways I figured might as well do an oil change. Oil change completed and I thought a little more about the issue and figured I’d check the PCV valve. Wouldn’t you know it, it was not working very well. So I figured that was my problem and I changed it.
Having done this I monitored my oil level every couple of days to see what’s what. After a few weeks and over 800 miles of city driving with LOTS of idling in -30 to -40 weather, not one drop of oil was consumed. Same level on dipstick as when oil change was completed. So I figured woohoo... but not so much obviously.
It just so happens that the first time I noticed the oil was down I had just finished a highway tow with the same trailer. Based on this it seems that the consumption is only happening (or really happening badly) when I am towing. Could that be because it’s constantly under boost when towing? If so (or not) what could be happening? Any help, past experiences, thoughts would be much appreciated.
Background on this, noticed I was down about 1 litre of oil a couple weeks ago about 3000 miles after last oil change. Since I was going to throw a litre of oil in anyways I figured might as well do an oil change. Oil change completed and I thought a little more about the issue and figured I’d check the PCV valve. Wouldn’t you know it, it was not working very well. So I figured that was my problem and I changed it.
Having done this I monitored my oil level every couple of days to see what’s what. After a few weeks and over 800 miles of city driving with LOTS of idling in -30 to -40 weather, not one drop of oil was consumed. Same level on dipstick as when oil change was completed. So I figured woohoo... but not so much obviously.
It just so happens that the first time I noticed the oil was down I had just finished a highway tow with the same trailer. Based on this it seems that the consumption is only happening (or really happening badly) when I am towing. Could that be because it’s constantly under boost when towing? If so (or not) what could be happening? Any help, past experiences, thoughts would be much appreciated.