Okay simple question, what is the hose connected to? IF i was to send premix thru that hose, would it make it to the tank. My plan is to connect that hose to a washer pump and switch so that i can premix by pressing a button. Pic is an example, i do not have my tank removed to check

 

I would crack open the good ole factory service manual. It'll be in there for sure ;-)

 

that is a check valve..and unless you delete it nothing will flow INTO the tank through it.

 

May be it's pressure sensitive, but thought it was the rollover/vent valve, meaning it's open to allow
the fumes to get to the charcoal canister but on a rollover it would shut and not allow fuel to spill.
Blow through the hose to see if air enters the tank.
Regardless, I wouldn't use it for another application as the tank needs to vent.

 

Probably the easiest place to tie into would be the fill neck vent tube (right next to the big fill port on the right).

Also, I'd be leery of a washer pump as it's designed to push thinner, less viscous water instead of oil.
Might work, but I'd check it out first.

 

I'd wonder how you meter the oil quantity going into the tank.

 

test it by filling a measuring cup up with the pump and count how many seconds it takes to equal one ounce.

 

I can't say I've been convinced by previous attempts/discussion of this subject.

The stock system is invisible to the operator, requires no regular maintenance.
But, you say, the OMP can be problematic (especially on the S5), the oil distribution is awful and the oil itself is wrong.

Agree on all counts, premix is absolutely superior in all respects...except operator convenience because it does require you add the oil yourself. Frankly, I don't see that as much of an issue, you're already right there pumping in gas anyway.

BUT I take issue with complicating a process whose main advantage is absolute reliability and simplicity (you dump oil in the gas, if the engine is getting fuel it's getting oil too, no question).

When you press the button how certain are you that the correct (if any?) oil was injected?
And you now have a reservoir to monitor, presumably somewhere in the hatch/spare tire well area, which is kinda out of the way.

Seems like you're overthinking/engineering this.

 

I started looking in there, haven't found it yet.

by the way it looks, I was thinking the same thing

Very good point, i didnt think of that.

the filler neck vent tube was actually my original plan, just looking at alternative options, i believe it can be accessed from in the hatch area. I had planned to cut it and insert a T adapter and run it to a nice universal washer bottle. The viscosity does concern me, i would test it an make sure is flowing well without any issues

thats the plan

^^

 

At least run the test at a couple different temperatures- say oil from the freezer and oil heated in boiling water to see what the flow variations are.

 

It's in there.

 

Why not utilize the rear wiper washer bottle? Assuming the pump can take it.. fill it up and measure out what it holds.. then make graduating marks in one ounce intervals on the side of the bottle. Maybe place the switch near the bottle itself. Get gas, open tire compartment, push button and observe level. I would think you could theoretically make your own new hole in the tank for the two stroke to **** in through...

Or you could just premix the same way most everyone else does, and not complicate things lol

 

Hmm very good point, definitely will try that. I do think that since the reservoir will be inside, it shouldn't fluctuate too badly, maybe stay close to interior temps.

I have a spare rear wiper washer that i was going to use to test this theory, If it works, i would like to find a nice shaped one to hold atleast 1 gallon. I did get a chance to look at the filler neck vent and there is room to run y connector right there so its not even a difficult task.

I'm only playing around with this idea because its something I've been wanting to try. Imagine pulling up for gas, pressing a button for x amount of seconds and get gas. over here in new jersey you don't pump your own gas. it wouldn't even be necessary to get out the car. no added time, no measuring, no mess, funnels etc.

 

You'd have to press the button and measure the oil (timing the pump is measuring, is it not?) after you filled with gas or how would you know how much to add?

I premixed for a few weeks as an experiment and think you exaggerate the procedure...it's not particularly messy or time consuming. In fact, I could see that over the long haul, the only real concern would be ensuring you always had oil on hand.