Thanks by the answers. Before I used Castrol Power1 (normal and cheaper version) 10W40 but this time I wanted some better because the motorcycle drank some of oil. Not too much but yes, specially at hot days. I thought somedays if my engine was wrong but I have lack of memory and I did not remember how the first year, at 2005, the engine drank a lot of oil just in one day, thanks to the traffic. Here, even in the north of spain, the summers have some hot days, even most of the days the normal temperature is 20º with a 60% of humidity.
Anyway, just I thought a change to one 20W50, I have used it in the past but it is worse in cold days as now. Specially if you make short trayects. With the 10W40, everything works correct from the first start second. The 20W50 requires too much warm-up but I am sure how at least with poorer oil, Cepsa and Motul, oil in summer was more time inside the engine.:) Well, nothing is perfect. Advantages and disavantages. I will see what happen with the Castrol Power 1 Racing 10W40 when I add it. Not today, I go to wait some months.
