What y'all make of this situation

Years ago when I moved down here to Hebron to farm, I started running Cenex oil in everything. When it come to my gas tractors, the Cenex manager in town thought straight 30 weight auto gold was what I should use. I reluctantly used it, but after running it with no ill effects I continued to do so. All of my GAS tractors have it in them, and use little to no oil.......until now. About a month ago, I changed oil in my D19 and in my one ninety gas, and put in the 30 weight auto gold, like they've had in them for years, and all of a sudden both are taking a quart of oil every 2 to 3 hours. One is running a PTO generator on a pasture well, and the other raking hay. Not heavy loads by no means. I talked to the cenex manager, and he said to change it out and put some 518 in em and see what happens. Guess I'll try that. I'm kind of sick to my stomach about the whole deal. What could have went wrong? Darrel

And you are not using a multi-viscosity oil that "adjusts to the temperature" because ???

I have used the Cenex oil for years in both gas and diesel. I use mainly 15-40 in the diesels which are a duramax with 145000 miles and my D21 neither use oil. My D17 I use 10-30 in and it uses oil and always has needs overhaul but dont use it all that much so am not going to do that. If I was you I would change to a 10-30 or 10-40 and try that. You can have a sample sent in to Cenex for a test to see if there is a break down of oilo or metal in the oil they do that around here for no charge and are happy to do it. Hope this helps you Dave

DaveWisc. wrote: I have used the Cenex oil for years in both gas and diesel. I use mainly 15-40 in the diesels which are a duramax with 145000 miles and my D21 neither use oil. My D17 I use 10-30 in and it uses oil and always has needs overhaul but dont use it all that much so am not going to do that. If I was you I would change to a 10-30 or 10-40 and try that. You can have a sample sent in to Cenex for a test to see if there is a break down of oilo or metal in the oil they do that around here for no charge and are happy to do it. Hope this helps you Dave

Yeah, not currently anyway.

Never heard of Cenex oil is it some kind of supposed super oil like Amsoil?
BTW I use Kendall diesel grade 15W-30 in every engine I own and never have had
a problem that was oil related I know of.

I'm with Stan IL&Tn. They will never tell you they changed suppliers. MACK

"Never heard of Cenex oil is it some kind of supposed super oil like Amsoil?"

Cenex is a brand name, origin was Farmers Union Cooperative.   CENtral EXchange. Have their own refinery in Minnesota.

I would stop running them now.

Then service one with Shell Rotella and see what happens.  There is something amiss here.

Just what I would do on the oil, use something else but change one out and run it.

I run 15W40 even in my little three jug yanmar and it is very happy with it.  Never add any.

What a bummer.  An update down the rod would be educational.

I am definitely going to put something different in, and see what happens. I'll go to my grave swearing that there was something wrong with that lot of oil. A little guy like me doesn't have a snowballs chance in hell of getting anywhere with cenex as far as any retribution. But like I stated above, the super lube that I run in my diesel engines is top notch. Brother in law bought an L2 about 10 years ago from a neighbor. Got it cheap, because the neighbor said it would burn a gallon of oil in a long day, and he had been using the same chevron oil in it as the owner prior to him had been using in it. We switched it to cenex super lube, and never added another drop of oil to it. Darrel

tractorman wrote: Just   a   thought   from  days gone  by  Have we forgotten  the experience of  when high detergent oil  was introduced  and what happened to the old  motors that had run  their  lives on  30 weight  non detergent ?   my 53  plymouth that did not burn  oil  sucked oil like an alcoholic  after my service station  manager said now  is  the time  to switch to  10w - 30,   my  guesss is   away went  all the sludge  that  plugged all the leaks .

Or... dissolved the sludge and now it's being circulated; tearing things up.
Sludge in a non-detergent engine is some nasty stuff.

If you are going to do oil samples I would send them some where else besides cenex, if there is a problem with the oil not always sure you would find out about it.

Darrel, get a oil sample bottle from Butler Machinery, should be under 20 buck's.
 Top notch oil lab.

I have never heard of Cenex motor oil either, but I'm on the other side of the country here in New Joisey. Kinda strange though that two engines all of a sudden started using oil. I've always run Cam 2 10w40 or 15w40 in all my Tractors and equipment and never had a problem so far. I have seen engines use oil if they were originally on straight weight oil then switched over to multi-grade. The multi-grade does a good cleanup job internally, but also could result in ring seal etc down the road which would lead to oil usage eventually....
Steve@B&B

So Darrel...I'm just curious .... How long after the oil change did the motors start this oil drinking???

Was it a few hours or a couple days????

Did they start smoking...liked they were burning it???

Or are they bleeding somewhere??? Like rear main seal or front seal..valve cover???

Think maybe the valve guides and seal????

That sure is a lot of oil getting away from them.....and both after an oil change....hmmm....I just am curious

Ocharry