Detroit 12.7l burning oil and excessive blowby

It may be, thick and gluey, that's why I mix it with MMO.

I pay 40+ bux a gallon for a synthetic gallon though.

 

$25 ?, it’s more like $35 here in the west coast.

 

The last time I looked at it was years ago, figured it has went up with everything else.

 

It’s a little thicker than 50 weight. It’s about 200 weight and has zero additives. A GL4 140 weight gear oil is a better option if you need a little psi in a bottle.

 

Did you try the GL4 or Gl5 gear oil just to stretch it out ? If it so worn out and on it’s way out, you have absolutely nothing to lose. Rawze’s website says you can add up to 2 gallons. This is for a Cummins, but like I said, your engine is on its way out and you absolutely nothing to lose. You can get that gear oil at Walmart for about $15.00 each. Keep us up to date.

 

I think it will be much easier to keep what you have, and rebuild it. I’m pretty sure you can find a kit, head, injectors, and bull gear. Costs around $6k. Add labor, about another $6k is fair. With the cost of equipment right now. Either sell as is, buy another, or keep the low buck money maker you already have. Time wise, Labor, trying to find a 14L, and wire it up to work is too much effort, time and money. Not worth it.

 

I honestly wouldn’t pull a 12.7 to put a 14 in its place. 12.7 can make very good dependable power and you don’t have to change anything else. I don’t think there would be much other than some wiring otherwise if you decide to change it. If you do I think a 2003 is the best 14L to get. They didn’t have any of the egr garbage and had a great reputation.