</font><font color="blue" class="small">( use one of those plastic storage containers (something like 18x18x30 it does slide under the tractor and leave room for hands and tools) and beforehand I line it with a 30 gallon trash bag. )</font>
I use a very similar techique with three 5-gal buckets, double-lined with tall kitchen bags. I normally do the oil change outside, so the amount of oil I spill while changing buckets is only a tablespoonful. If you use a flattened cardboard box, you won't even get any oil on the ground and you throw the box away afterwards.
Like you, I pour the old oil back into the containers the new oil came in and then dispose of the slightly oily trash bags. It's a very neat and clean job and my 5-gal buckets can be used over and over. My buckets are metal, but there is no reason you couldn't use plastic 5-gal paint buckets either, as long as you can get the top off. /forums/images/graemlins/cool.gif