In the pointy end of TX. Downsizing from Case-IH 45A. Made great use of this forum with my first tractor (NH TC30) but first return visit after long absence. Now have JD-3035D. Operator's Manual specifies engine oil and filter change every 400 hours. Seems longish interval compared to what I remember from other small tractors previously owned. More surprising, should there not be an oil and filter change after the first 50 engine hours? Thank you.