local dealer that i always deal with tells me (now after 5 years) that on my 06 900 i should be mixn 1.5oz oil to every 4L of gas! also to run octane booster in with my preminum at 2200ft (where we live) does this sound true? i only got 1000 miles so i dont have enuff mileage to know. i felt the sled used quite a bit of oil as it is. thanks for any input.