Thread: Oil change by evacuation

Great way to allow sludge to build up in the bottom...

Regular changes may prevent this but I'm glad to watch it all drain away.

Look into the quick connect sump plugs as an option... Drain via a click on hose and no mess.

something like a fumoto oil drain valve should work.


I've been running one on the other car for years, and it's a ripper. Oil changes are lilterally a 10 minute job. 4 of those minutes are warming the engine up!

God I had one of those 30 years ago, it was great. I wish there was an easy way to swap the filter on many of the vehicles we have owned! Many a cut / scraped arm.

The valve is a good idea, but I've still got to get underneath and take off the sump guard.

So anyone actually used the suck out method!

Regards

Yes sure have, Mityvac unit works very well, I use it for my mid-cycle oil change. I had the same though as you Tombie, what's going to be left in the sump. I saw some videos on youtube that did a comparison between draining and vacuum and showed no problem and if I remember correctly the vacuum extraction actually removed a bit more oil. I think a motor with a tube for vac extraction designed for the job would be fine. Question is what do the dealers do, drain or vac it? Does anyone know. What point LR going to the cost of design, manufacture and install if no intention to us it. No way would they do that, vehicle manufacturers do not spend money for no reason. You can bet they tested it to make sure it recovered the oil and also contaminates. Also when you consider the nature of modern oils, especially (the cost of) the LR specified castrol, they are highly detergent and good at keeping things clean on the inside.

A mate of mine repairs mowers and other small motors.
He has been sucking the oil out of them for years.
Never had an issue.

But i am like Tombie,like to see it run out and will often leave it to drain overnight.
I will on occasions also jack up the vehicle slightly to get more to run out,this often helps with diffs.

A lot of mobile plant in the mining industry and no doubt elsewhere uses an oil evac system. Simply hook up to the evac pump on the service truck and suck it out.

Where I was working until recently, our mobile crushers and screens (Caterpillar and Scania engines) all had this fitted.

However, even though this system was used regularly, it was still standard practice to drop the sump plug at each oil change, both to drain any sludge and more importantly to inspect the magnet in the centre of the drain plug for evidence of any metal.

Personally, I would never do an oil change on any of my own vehicles without dropping the sump plug (unless I had one of those quick drain valves fitted).

I've recently done it both ways, first time I sucked it out using a homemade suction dumaflicky that sucked so well it collapsed the 7 litre vessel down to about 3 liters so I had to stop halfway through and empty it, but it worked and I got 5 litres of oil out, before it started sucking air.

It seemed to take forever to suck out despite the great suction, maybe it was the suction hose collapsing? But it didn't seem to be?

That oil change was a quicky, I was waiting on filters and they hadn't arrived yet so I thought a quick change was better than nothing.

When the filters arrived I did a under car service, luckily on a hoist, with a hoist getting the sump guard off is no problem, but if it were on the ground I would probably go for the suction method next time.

A drain valve with a suitable hole in the sump guard would be ideal I think.

I didn't get to measure the amount of oil drained from the plug, but it would be all subjective anyways I think, who really trusts the electronic dip stick?

The electronic dipstick is the longest part of the job by the way....... especially if you miss the window of opportunity.

I picture a Land Rover dealership with nanas baking timers sitting on bonnets for when to check the oil.