No, there's often no oil gage, and it's filled on a time basis if you're signed up for automatic deliveries. They play it safe and fill it before it's necessary, the first few times, then when they've got your usage figured out they have a computer program that takes the weather into account to schedule deliveries.
I have a gage on the tank but it's not worth a shit, so I generally knock on the side if I'm curious, as it will sound different above and below the oil level. Or if I'm really concerned, pull the plug on top and dipstick it.
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The descent of man ~ Nixon, Friedman, Reagan, Trump.
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