I have a 04 BMW R1150RT and would like some opinions on when to switch to full synthetic oil. I have talked to 3 different Dealers and they all said to wait at least to 18k before switching to synthetic. One dealer even said to wait till 30k. These bikes have a thirst for oil. Some of these bikes consume as much as 1qt per 1k miles. Mine never has used any oil at all, even before the 600mi service. I now have 2600mi on this oil and filter and still have used no oil what so ever. I plan on using Mobil 1 15w50 and a BMW filter. Since I have no oil consumption in 2600mi, what do think? Summer is here and this bike runs hot. Out of 10 bars on the oil temp. gauge, At 75 mph with outside temps in the 95deg. range, It usually runs at least with 7 bars, 8 bars in traffic. I don't know what the temp.is relating to the bars, but I do know it's pretty hot. 9 bars is in the danger zone. Any thoughts?