Strange title I suppose but here's the thing. The DRZ has a drinking problem, it uses 1.7 litres of oil but still demands short change periods when used on dirt. More modern bikes hold less and cope fine. From memory the, KTM450 holds about 1.1 WR450 1.1 & WR250 is 1.4 CRF450 950ml!!!! So why do ours need so much? I can understand that wet sump bikes need to maintain a certain level to ensure the pump is always covered but ours are dry sump. My question is.......... Is the 1.7l required in order to increase the service interval or do Suzuki really think that so much oil will be spun around the engine that a massive head of oil in the tank will be need in order to maintain an un-interrupted supply to the oil pump? Basically if I could get away with only filling 1 litres it'd be cool. I'd change it more often and extend the dip stick so that I could still monitor the level. The bike would then be a little lighter up top and I wouldn't need to have part used bottles of oil hanging around in between changes. Happy Christmas, Rich.