The engine has to be at a minimum rpm to idle. The ECM monitors RPM to make sure the engine doesn't fall too low. If load is added and RPM begins to fall, the ECM adds fuel and opens the throttle a little bit to get back up there.
This was done by foot back in the day.
No such thing as "creep mode". That's just idle with torque. As you add load to the idling engine and it drops below what it considers "idle rpm" it opens the throttle body a bit and adds some fuel to get back up there.
-Always be sure to find the old gasket. They sometimes stick to the engine and don't come off with the filter.
-Only hand tighten the new filter, even if you had to use a tool to remove the old one.
I once had the oil pressure sensing tube (mechanical gauges in the '70s) come dislodged in...
It's a bit of a wash.
Sure there's no fuel being used while coasting in gear, but there is more drag on the driveline to turn the engine over without fuel, so you won't coast as far.
Less fuel used, but also less distance.
That is to prevent linking your username to your identity. With a visible tag, somebody could look up a name & address. I wouldn't post VINs here either, but if I was trying to sell a vehicle, the person ought to know who I am.