at my b19 the head seal on the fourth cylinder is a bit leaky and the engine needs for a long time øl. similar about a liter / 500km. in the last two months, however, I drove almost only at the end of the week, then mostly just under 1000 or 1100 km, in two stages, and that at quite constant 3,500 u/min, which corresponds to about 105 km/h. I do not turn the motor out of principle over 4,000, only all few weeks for an eye view on 5,000, I was recommended to In these last two months the consumption of øl has increased by about 50-90%, varies slightly. is this now due to the higher speed and the pure long distances and is rather harmless or is it possible to predict the final motor death remotely? will otherwise buy a new 20 liter canister 10w30 tomorrow morning anyway.