We have a Kenworth T-700 with the Cummins ISX engine in it. We are currently going through a gallon of oil every 2000 miles or less. Cummins says that this is normal. In my Freightliner with the Series 60 I have 665,000 miles on it and have never added a gallon between changes (25,000 miles) and don't understand the consumption issue. BTW...engine only has 170,000 miles on it. Please help with some advice/answers.
Oil Consumption in Cummins ISX
Discussion in 'Kenworth Forum' started by ChrisM586, Oct 11, 2013.
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My ISX doesn't use the first gallon until 12k miles.
BTW, this same question has been covered in the general maintenance forum. -
yes for this engine it has become the norm. you need to get an oil consumption sheet and document oil consumption. cummins states 1 quart to 500 miles is to much. the problem is carbon packing on the piston above the top ring. the carbon packs in between the piston and liner and is so abrasive it polishes the liner out. cummins has a piston that is a little smaller that helps the issue.... what do they mean by helps? does that mean it takes a little longer to pack full of carbon? Ive seen engines with 120,000 need rebuilt due to carbon packing. this is a widely known issue and getting help from your local dealer shouldnt be a problem. if your warranty is up see if you can get policy to help cover the cost
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i'll use 3 quarts between 15k mile oil changes.
about 1 quart if i mainly cruise in the lower rpm's. higher rpms for the hills.
600k miles. -
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deming807 Thanks this.
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Same problem with our 2013 were is the link to the thread that this is a known problem or is there a service paper from cummins about this issue?? Right now we are at 2-Gal every 10,000.00 Gal
Last edited: Oct 13, 2013
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deming807 Thanks this.
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