Hi all apologies if other threads on similar topic have not been used, I did search. I bought an m50 Suzuki Bouley last year brand new in Aug and it has been performing great. Around the 3500k's mark I noticed that the oil level had dropped from being at the full mark to being just above the low mark. I immediately presented it to the same dealer who performed an oil (but no filter) change and then told me to return in 500k's. (first overnight stay- stayed for 3days) I put 500k's on it that weekend then returned again, he checked the level and said it looked fine and bring it back in another 500k's. (2nd overnight stay- 1 night) I kept an eye on it over the coming 3weeks and represented at a further 500k's. (3rd overnight stay- 1 night)Dealer said to bring it back in 1000 and see what it is like then as there had been minimal shift. In the next thousand kms I did a fair bit of highway running with the engine at a constant speed eg 110kph for quite some time. It was after a 700 k journey that I rechecked and sure enough the oil had dropped in level again from full to almost low-mid. I returned to the dealer and we discussed it and as it was so close to its next service at 5000kms decided to do its service then when an oil and filter change occurred. Same oil brand as before (ipone semi synthetic 10w/40) went in and level noted but this time apparently the Suzuki rep was consulted and both said to return in 1000k's. (4th overnight stay- 1night) It just spent the week there last week and involved Suzuki melbourne and its relevant rep and they say that oil range falls within acceptable limits. A brand new bike using 600ml every 1400kms is acceptable-how so? I had a 14yo commodore v6 that did not even use oil and it had a 150000 k's on it. My bike is babied and only has 6000 k's on it....They did not even offer to change the oil type or viscosity or go to mineral instead of synthetic. I have even had to purchase my own top up oil for in between services....What do we think of this? Any ideas?