This guide will show how to easily get the 'Old Still Good' achievement in Spintires: Mudrunner
I used the map 'Island' in casual mode, since I didn't want to bother with refueling. As equipment I added the trucks B-130 (which is of course mandatory for this achievement) and D-537. Of course you can use any other powerful truck for this.
Once the level is started, switch to the B-130 and equip the 'Log Carriage' as well as the 'Short Log Trailer'. Switch back to the D-537 and attach the winch to the B-130.
Once winched together start making your way to the Lumber Mill and drive past it. On the asphalt bit turn right and from there on it is more or less straight to the Log Kiosk.
After arrival switch to the B-130 and load up both truck and trailer and make your way back. Since only 5 points can be loaded that way, there is need of a second run. So make sure you stop by the garage to refuel between unloading the B-130 and starting the second run.
You only need to load the trailer on the second run because 3 points are between you and the achievement and your truck alone can only transport 2. Therefore the trailer sadly can't be ditched at that point.