Never store or transport any more oil than you would want to have the hazmat people clean up for you...at your expense. + fines.
Certainly true here! Some years back my son was driving our van (still on a permit) towing my little tent trailer, on the way back from the mountains and we came off the freeway on a ramp and he didn't slow down enough for the turn at the street at the end (on a green light).
I thought we were going to roll the van, but while it held, the trailer didn't and flipped, broke lose from the coupler, snapped the chain, and wound up spinning around and smacking the vain in the right side, (left turn). We were damn lucky it didn't contact any other vehicles...
Trailer is an all aluminum box, and to increase carry capacity, I have two car top cargo boxes strapped on top, an ice chest in front of the box (in a tray made for it), a prop tank in front of that, and a spare tire in front of that...
It landed on it's top and we got it onto it's side, and with the help of one other guy, got it back on its wheels, I set the tongue jack down and got it rolling to get it re-hitched. (Coupler was bent but useable)
By now a cop is there, and asked me if I spilled anything. I said no, and he's like "Whats that?" pointing to about
three teaspoons of water...
I realize he's ready to call the Hazmat team for this... I tell him it's water from the ice chest, and he's like "Are you sure?" "Yes that's the only liquid on the trailer... (A little while lie, there was a a partial can of white gas too, but I knew that wasn't what was on the ground...).
Then he was all "get this off the road", and crowding me while I get it hitched and is getting impatient while I get the chain jury rigged in case the coupler didn't hold.

Complete douch of a "Safety Officer"..
Point is, they are REAL NASTY for anything spilled, AT ALL...
Oh yeah total damage was a couple of the straps were wasted, both cargo boxes made their last trip getting home, one leading corner of the trailer box had road rash, and that was about it. There were five lanterns on board, and I expected all of them to need new glass globes. damned if the mantles weren't intact and the glass as well!
