After doing a swap from the 2.6 to the 3.0 on my w201, other than using more fuel (which I expected with the bigger engine), my oil consumption appears to be really high. I would say after an oil change I have topped up at least 3 times (1 full quart each time, so 3 qts total) in the last 2k miles. Before I did the swap I replaced most of the top end components: rocker arms, cam shaft, valve springs, valve stem seals, replaced all the rubber and completely sealed the front cover and even did the freeze plugs. The engine is a m103.981 from a w126, I know there were issues with the cam and the rocker arms on that particular engine so that's why I replaced all the old ones. Also, I did read that it does burn oil, but due to valve stem seals, which I've replaced and even checked and they all seem fine. Even removed the throttle body and the inside of the intake is as dry as a bone (which surprised me) I'm used to seeing a little oil film in there, but I did remove the EGR so that might've helped. The spark plugs are clean and have no carbon deposits on them and I don't see any blue/black smoke coming from the exhaust and engine has no leaks anywhere. Coolant was checked also and nothing in there. right now I'm running Liqui Moly 10w-40 with MOS2 and I recently topped up with the Lucas heavy oil stabilizer. Anyone have any idea or recall anything about these engines burning oil? Thanks

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1990 190E 3.0L