Folks,

Last spring, I checked with you for advice regarding the better method to use for an oil change. MityVac or old school tried and true oil sump plug off.

I decided to go with the tried and true since it was the very first oil change and I wanted the break-in metal shavings out of the oil sump.

BUT…. the Indy said that even if he had wanted to do the MityVac way, the 2025 seem to have a different oil dip stick tube and his MityVac tube doesn’t fit in there.

He said he uses it all the time on other Defenders and most specifically the shop owner’s 2023 130 with the 6 cyl engine. He even showed me the the extraction tube he uses on other Defenders, and it is in fact too big to fit in my Defender dipstick tube.🤷‍♂️

I’m really interested in doing my own oil changes from now-on with a Mity Vac especially since I install the front metal skid plate.

what gives??? Anyone with a 2025 P300 using the Mity Vac ??? Does one need a specific extraction tube size for it to work ??

Thanks for any input

 

https://landroverforums.com/forum/20...-valve-119176/

 

that valve has been a game changer, highly recommend. but on the mity vac front, note that it does come with 2 diameters of hose, and I'm sure you could figure out how to attach a smaller hose if it's actually needed. That's said it's well worth the effort to install the drain valve.

 

Yeah, I read about them a while ago but my Jeep Wrangler JL had such an easy access to the oil pan that is was not logical to use it. But now, I think I’ll have my indy install it during the next oil change and do my own oil changes from then on.

 

I’ve spoken about this on other threads. The suction method leaves approx .3 of a quart of oil in the sump. That oil is what’s resting at the bottom, so any accumulation will be left there. Compound that over multiple oil changes, not a great idea in my opinion.

 

This is not my experience.
Vacuum method gets the job done. Almost nothing remains. I measure what comes out. 8.8L and what goes in.

Let say for sake of argument that it does indeed leave 0.3qts. That's 3% of the 8.8L oil capacity left in the sump; not something to sink the method as valid. FWIW, vacuum is the LR prescribed method for the L663. But as I said this is not borne out by my own data.

To the OP's question. Mityvac comes with three hoses. A fat one that goes into the pump and two others. They are narrower and fit in the dip stick tube comfortably. I'd like to see a picture of your dipstick (giggity) preferably with a measure. My guess is that your mechanic simply does not have the right tube for the job.

 

alright, I’ll get the measurements tomorrow for you.

 

I have run tests as well, that is where my .3 came from(on average). Also, why put a drain plug?

We find that not all of the LR factory methods are the best from the long term health of your vehicle. One instance is the insanely long oil change intervals.

 

I know a couple of people who have used mityvac then taken off drain plug once it's extracted and nothing more came out beyond a few drops. If you're worried, can mityvac then pour in a small amount and vac again.