3000 to 5000 miles on s-10 blazer
old allis chalmers tractor (gas). twice a year, i put way to many hours on it, and run it rather hard when mowing. i can quickly tell difference after an oil change in how it runs.
ford 555c loader backhoe (diesel). it is about due for an oil change. hour meter doesn't work, but i would think by now, i have 100 hrs on it.
push lawn mower, push weadeater, once a year.
honda generator, depends on how much it is used, once to three times a year.
mom's ford 4x4 small size truck. i think she is almost to 300,000 miles on it. and is changed 3000 to 5000 miles.
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if you have a spanking new tractor. double check the manual. normally there is a reference chart. for initial times to change oil.
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not a gear head. so i might be WAY off. i thought it was better to drain oil, and put the vehicle up on blocks for long term storage.