Any one use Stop smoke additive? I hear that it helps blowby issue where ring worn out. But I am not sure it is ok with dpf. No where mention about dpf.
Thanks.

 

No oil additives ever IMO. For that matter any type of "fix" additive is only going to kick the real problem down the road a little.

 

Some owners of high mileage vehicles use oil spec'd for high mileage or use higher viscosity (5w-40 or -50 instead of 5W-30, for example). Additives? No idea if/how/why they might work, but I'm skeptical. If your oil consumption is severe, you should consider an engine re-build.

 

I've used BG RF-7 on high mileage engines to extend the time before rebuild, and have added 20,000 miles to a couple of engines.
https://www.bgprod.com/catalog/engin...oil-treatment/
My old school German air-cooled Porsche mechanic recommended it. (He actually owned Speedster number 5 and 7 (or similar). Retirement money!)
I thought all such things were Snake Oil, but not this product.