Hello, my Monza 2.5 E , Jg 82 no longer has the full power. Kilometer level 150 ́000 acceleration is no longer intoxicating(was never) but it was a little better before. Highway max. 140Km/(formerly about 195) and on the mountain on the track no more faster than about 80-90Km/h.(is depressing) Until recently I have always added lead to the 98okt until I have read in several forums that this will pollute the valve shaft seats and therefore cause a compression loss In addition, these people have been driving without lead additives for a long time and without any problems as they wrote. However, I only drive without an addition after he had no performance (of course only as a Sunday car) compression tested – on all 6cylinders 10-10,5Bar I find as too little, but if, why on all cylinders? I don’t find logically that all compression loses. In addition, too much oil (from the crankcase) accumulates in the suction hose, which pollutes the LMM. I replaced the LMM and additional air slide, because the cold start was also very bad. (Cold start now perfect again) Does anyone have experience with these problems and maybe give me a tip whether it’s the valves or the piston rings that could slowly give up the mind. Or maybe another idea? Thank you in advance.