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Oil Changer for any car with a dipstick

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For cars that have an oil dipstick, I have been thinking about designing an oil changer pump that will be like nothing else on the planet and will have the following features:

1.      Of course you will not have to jack up the car as the oil will be extracted through dipstick hole.

2.      Unlike other extractors on the market , this unit will not require

a.      An air compressor to operate

b.      Manual pumping to create suction

c.      The user to dump the oil, it is pumped directly into the recycle container

3.      This unit is very small and easy to handle

4.      Made in USA of machined aluminum NOT plastic

5.      Can extract warm oil in 2-5 minutes depending on vehicle capacity

6.      Does not require a battery, operates on your car’s 12 volt battery

7.      Costs less than some people pay for an oil change

8.      Anyone can easily use it from teens to non-mechanical persons to the elderly

9.      Allows you to change your oil without jacking up your car in as little as 5 minutes.

10.   Looks Awesome I billet aluminum or anodized blue

Would you be interested in such a device? If enough people are interested I will engineer one like nothing currently in existence.  Let me know.

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You would need to get in line, others have been there before you.  Mityvac, amongst others, have promoted this concept for years.  Unfortunately, there is are a couple of major downsides:  Going in through the dipstick tube, you rarely get all the old, contaminated oil out.  Secondly, and perhaps more importantly, there are a lot of sharp edged things down there that can catch flexible tubes inserted down the dipstick tube.  We have had more than one car flat bedded to the shop after an oil extraction unit line got stuck and could not be removed, requiring us to run up some expensive shop time getting it out.


If you cannot get under the car and change the oil, or are uninclined to do so, take it to a shop and let them change the oil as the car was designed to do.  In the long run, you will save yourself headaches and expense. :wink:

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I used a plastic vacuum canister to remove two gallons of SAE 30 annually for 25 years on the Chrysler flat-head 6 in my cruiser before I retired her.  It worked pretty well in a boat with a primitive engine, but I wouldn't know about something like a Porsche V8.  What's wrong with twisting the nut?

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I can see the attraction of this for engines where access to the drain plug is not easy.  Sometimes the under trays are a bit awkward if you haven't got  a ramp to gain access.  However, on my 911 the access is good.  I like to see the old oil flowing out and be able to inspect the magnetic plug. I sometimes put a half litre of new oil in on an empty plug to see clean oil flowing out. 

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