[2.2 Straight six]

sort of.

don't go thinking that filling 1/16"-wall tubing with oil will give it much more stength. it'll make it a lot heavier.

it'll give a tiny arount more stregth, but how much i don't know. probably not enough to measure a difference. remember that fluid has no load-bearing capacity like a sloid does.

if you want to increase the strength you'll have to either reinforce it or get something like a steel winch bumper.