[Mickey_D]

Something else to consider for all us shade tree mechanics that don't have a beautiful concrete floor in a shop :

Jack stands on gravel or dirt might as well not even HAVE a rating. ALWAYS place them on something, like a 2" thick slab of hard wood, or a 2" thick concrete paving slab.

NEVER do like my brother did with his '73 Barracuda and lift the front end of a vehicle, slap a couple 2 ton $20 jack stands under, rip the wheels off, then scurry under the front end to change the oil, all while the thing is sitting on a dirt and gravel driveway. You'll find out rather quickly if you can bench press a car. Luckily for Ian, I was still hanging around with the floor jack at the time and he's still alive to relate the story.