I have a Sealey one of these and it's great for this kind of job. Not really sure it should be used for full oil changes though? I got it for doing lawn mowers which often don't have a drain plug and you have to invert the mower to drain them, ok if the fuel tank is empty. Handy for draining fuel tanks to.Search "vacuum oil extractor" on ebay and you'll see cheaper ones around £25. Rust Locker used a (more expensive) Sealey to carry out a full oil change on his Combo but the £25 jobs should be very up to the job of getting you out of your predicament and, I suspect, work well enough for at least a few oil changes in the future should you wish.