yeah I went quite a few weeks without one when the RCZ's broke. Honestly .... I probably havent checked it in 3 months ... even though it now has one. its overdue for an oil change by 3 months now ... ( but has only done about 12,000kms ... so i'm not overly concerned). I might change the oil and see how its level it going next weekend. no doubt it'll be exactly where I filled it to last year... I just need to fit a radiator and generator to the id19 so I can drive it off the hoist and out of the way 