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Sohn Adapter related question

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Old 08-16-2012, 09:46 PM
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Sohn Adapter related question

what size hose to use on that fitting on the adapter??
i have the installation instructions but doesnt say what size hose to use.
any info would be much appreciated as i would like to do this mod asap.
parts been laying around for about a week already and ive searched forum and googled no info on what size to use , also ive seen people use custom fittings but i really want to stick with not changing anything and using what i have.
Old 08-16-2012, 09:50 PM
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Take the adapter to Lowes/Home Depot and find a hose that is rated for use with oil that fits the barb fitting on the adapter. Its probably going to be 5/16 or 3/8
Old 08-16-2012, 09:57 PM
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^beat me too it lol

You can always do what I did. I brought the adapter with me to home depot, found a black hose that fit snug on the adapter that was acceptable for use with oils, and would stay in place with a small hose clamp then I found a corresponding fitting in plumbing section that fit the hose for the reservoir. Simple and easy.

Last edited by redline86; 08-16-2012 at 10:00 PM.
Old 08-16-2012, 10:23 PM
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I purchased 3/8" OD - 1/4" ID PTFE tubing from US plastics. http://www.usplastic.com/catalog/ite...3540&catid=840

Make sure you use tubing made for petroleum products and capable of withstanding engine bay temperatures.

Last edited by DarkBrew; 08-17-2012 at 06:37 AM.
Old 08-16-2012, 10:51 PM
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thank you guys so much so , btw i did happen to go to homedepot and they did not have any hoses for oil/ petroleum use.

also will i be needing hose clamps or is this something where i just need to shove the hose on the fitting and it wont leak?

oh and about how long do i need the hose to be i want to mount the reservoir where the washer fluid bottle is.

Last edited by coolx7; 08-16-2012 at 10:53 PM.
Old 08-16-2012, 11:14 PM
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3 feet of hose should be lots...you can buy rubber vac hose at any autoparts store by the foot
Old 08-16-2012, 11:23 PM
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does it need to be transparent and heat resistant , im browsing online at lowes / home depot website , amazon and google nothing i see says heat resistant except the black rubber hoses that arent transparent
Old 08-16-2012, 11:30 PM
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It needs to be able to withstand engine bay temps, the hose I used is black, is thick, and is heat resistant and is ok to use with motor oils. Doesn't need to be see through, the black hose IMO blends in better in the engine bay that already has black hoses everywhere.

Just make sure it can handle the heat, oil, and wont easily be cut or have holes rubbed into it via vibrations from the engine.
Old 08-17-2012, 01:56 AM
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would fuel line hose work?
Old 08-17-2012, 02:05 AM
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Sure....or silicone vac line
Old 08-17-2012, 02:22 AM
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alrighty thanks ill head down to my local autoparts store to get one :D
Old 08-23-2012, 01:12 AM
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finally got the adapter on now i need to make a bracket for the reservoir.

One last question guys what kind of two stroke oil do you recommend to use in that reservoir?
Old 08-23-2012, 01:19 AM
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I use Idemitsu rotary premix, I would say read the premix thread but it is pages upon pages of useless crap and chatter. People say stay away from TCW3 or the marine stuff if you have a cat. still installed. I've heard good things about Royal Purples 2 stroke. I buy my Idemitsu from mazdatrix.com and a case last me about a year plus I still premix even though I have a sohn adapter. I doubt you could go wrong with a quality brand like Amsoil, Redline, or something equivalent.
Old 08-23-2012, 12:41 PM
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thanks but i've searched around and some say premixing isnt necessary if just daily street driving. so ill be just using the oil with sohn adapter is there certain weights or specific two cycle oil that i should be using?
Old 08-23-2012, 02:48 PM
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Redline, Idemitsu ( use it myself), Yamalube, Amsoil, Rotax...any good synthetic 2 stroke oil designed for air cooled 2 strokes is best

I would personally stay away from the marine 2 stroke oils...but they are still a lot better than using regular motor oil
Old 08-23-2012, 03:04 PM
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where would i be able to buy these brands , my local auto parts store does not carry those brands.
Old 08-23-2012, 03:25 PM
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Lucas Oil Products - Semi-Synthetic 2-Cycle Land and Sea Oil
Lucas Oil Products 10557 - Semi-Synthetic 2-Cycle Land and Sea Oil | O'Reilly Auto Parts

can this be used??

and as for the premix i see that on forums theres alot of different opinions on what to use , so how many ounces per full tank of gas? and with premix i can just add the above oil to my fuel right?
Old 08-23-2012, 03:27 PM
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Old 08-23-2012, 03:33 PM
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Google is your friend...

I'm sure the Lucas will work ok
Old 08-23-2012, 03:46 PM
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i have used google but i dont see any local stores around me that sell redline , amsoil and the other ones mentioned above really dont want to purchase online as my cars just sitting there waiting for the oil so i can start it up. and i dont want to put in something that will end up ruining the car. im located in 91755 southern california.

Last edited by coolx7; 08-23-2012 at 03:52 PM.
Old 08-23-2012, 07:16 PM
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Originally Posted by 9krpmrx8
This is gooooood lol.
Old 08-24-2012, 01:34 AM
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i dont understand how this is spoon feeding?
ive searched on line , gone to walmart , home depot , autozone , oreilly auto , napa in my area and havent found any suitable 2 cycle oil . and i did read this thread
https://www.rx8club.com/tech-garage-...premix-179072/

and i did see that ASH8 along with a few others said not to use oils TCW3 certified
but thats all that was available in the stores.
one more thing THERE WAS NO brand amsoil in any of those stores ,or redline 2 cycle oil besides masterpro and lucas which were TCW3 certified and at walmart was some uknown brand called supertech with no certs or ratings at all.
Old 08-24-2012, 03:18 AM
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It would be ok to use a good brand TCW3 until a case of a premix of your choice arrives. I just wouldn't use it for an extended period of time. Also, you could always just use some clean oil that you would normally use for your engine. You where injecting dirty motor oil before, I'm sure clean motor oil would be ok until a case of Idemitsu arrives.
Old 08-24-2012, 03:33 PM
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thanks for the kind reply , ill finish up the lucas 2 cycle that i purchased yesterday then get some idemitsu as you recommend since i cant find anything not tcw3 certified locally.
for the sohn adapter reservoir can i have just pure idemitsu premix oil in there when i get that fluid?

Last edited by coolx7; 08-24-2012 at 03:44 PM.
Old 08-24-2012, 03:44 PM
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i cant find anything not tcw3 certified locally.

Yes, stay away from TCW, I'd run without premix before I'd put that crap in the tank.

Look for an ISO-EGD or JasoFB rated oil, or do without, boat oil is for boats.


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