I need to know what brand of 2 cycle oil I should use to mix with my gas? Also where can you get it from? Can I pick it up at my local parts store(ie... Autozone, Advanced, Orielly's, Pepboys etc...) or do I have to special order it from somewhere? Also how is this going to affect the life of my fuel filter? Am I going to have to change it sooner or am I going to have to use a different brand of filter? Thanks.

any two stroke tcw3 works. valvoline seems to be the easiest/cheapest



mike

Cool thanks. I'll look around and see if I can find some in this podunk town I live in.

ummm isn't this pinned in the faq sec???

yes.

Does anybody know if the 2 storke TCW3 oil affects your fuel filter? If so is there a special filter that I should be using? Thanks.

the W, for wet, like in boat engines etc...

TCW3 is okay for fuel filters.

add the 2 stroke first, and then pump the gasoline. this way the fuel that pumps in later will help mix the 2 stroke oil.

Thanks onboost. I appreciate it.

you are very welcome https://www.nopistons.com/forums/pub...IR#>/happy.png

I am premixing my fuel now to and I just go to wal-mart and buy a gallon jug and divide it in to 7 even seections and dump one section in when ever I fill it up

half a quart every fill up

If I switch to premix how will it affect MPG? On a S4 can I disconect the rod from the throttle to the OMP to disable/bypass it? BTW the FAQ thread has nothing to do with premix https://www.nopistons.com/forums/pub...1047683561.gif

I need to go pick up some tomarrow. walmart here i come!

theoriotically, premixing does affect the fuel economy very slightly, since fuel burns better and cleaner than 2 stroke oil. However, after using it for so long, i can tell you that the difference is not very noticable.

On S4 if you disconnect the rod, the OMP still spins from the gear behind it, rotated by the eccentric shaft. Therefor, small amount of oil will still be injecting into the engine. The best way to by pass it will be taking out the benjo bolts on the OMP, and replace them with regular bolts. This way the oil will not be able to run through the lines.

Unbolt the OMP, oil injectors, disconnect the rod that runs to the tb. Put bolts in the oil injector holes and then get a piece of 1/8 or 1/4in thick aluminum (or steel) and trace the OMP onto it. Cut the shape out, drill 2 holes in it and bolt it in place of the OMP.

Does using premix effect your emissions?

certainly does

in what ways?

you are now burning oil with your gas, emissions will suffer, and

you will have a nice sotty back bumper to go with it. Havent you ever seen

the smoke and stink that comes from a 2 cycle?

nope, but ever since I took off my cats, my bumper started to tint yellowish/orange....

Seen how this topic is still going I will add another question to the mix. I've been adding premix for a couple of weeks now and have been wondering about this 100:1 ratio. Can someone please break this down into an ounce oil to 1 gallon of fuel ratio? I've been told to just add 16oz per fill up. Well this doesn't do it for me. I would like to have a little more flexiblity when adding fuel to my car cause whan I go to the track I like to have only 1/2 of a tank of gas when I get there, so that the car doesn't wiegh so much. also this would better help me get an acurate amount of premix oil added to my fuel. Thanks.

Off the top of my head .75 onces to the gallon, that's probably not right but close

I have heard all kinds of ratios myself(from 16 oz per fill up, or 16.6 gal, to 4 oz per fill up). I am curious to so hard facts.

Well I did some research on some other sites and here's what I came up with. They say you should have anywhere from a 100:1 ratio to a 150:1 ratio and the optimal ratio is 128:1 which is basically in the middle. They said the 128:1 ratio equals out to be 1oz per gallon of fuel or 12oz to 14oz per fillup. You end up with 12oz to14oz because when you fillup there are still a couple of gallons of fuel left in the tank. Can anyone verify this with some hard facts from a raliable source?

Ok guys i called Rotary Performance today and talked with Chris Ott about this premix stuff. After all the different amounts that I was told to put in the gas I got confused and wanted some info from a source that I could trust. He told me that I should be running a 150:1 ratio. He did specifically say that this was for my year model 7, so I'm not sure if this will be a good ratio for someone who owns a different year model. The cool thing though is that he is sending me a copy of his spread sheet that breaks down all the different ratios. Hopefully this will contain all the info for all the year models. Mind you he is sending it snail mail, but when I get it I will be sure to post it for everyone to use. Anyways here is the breakdown of the 150:1 ratio. It equals out to .852oz per gallon. Which is equal to 11.928oz(rounded to 12oz for simplicity) per 14 gallons(average fillup amount). On my year model TII according to my FSM I have an 18.5 gallon gas tank. If you divide this into quaters it comes out to 4.625 gallons per quater. This means that you'll need 3.9405oz per quater tank. Yes I know this doesn't equal 11.928oz when you multiply it by 4, but you must remember that you're not filling up with 18.5 gallons of fuel most of the time. Usually you only put in about 14 gallons of fuel per fillup. Hope this helps some people. Hope I get that spread sheet soon so that I can make everybody better informed about premix.

Hey Revvin can you pin this topic in the FAQ section? I think this one has turned out to be alot better than the other Oil/premix topic that we have. Thanks.

Just a couple of questions I'd like to add to the fire, I've noticed that TC-W3 comes in semi-synthetic and mineral form, which one should I use? Also, wouldn't using premix lower the octance in your fuel? If, so how badly would it increase the chances of detonation? Any help would be much appreciated https://www.nopistons.com/forums/pub...DIR#>/cool.png

The reason a 2 cycle engine smokes is not exactly related to rotary engines.



the oil:gas ratio is much more oil rich on a 2 cycle and a 2 cycle blows a significant amount of unburned fuel right out the exhaust port throughout the RPM range, it's the nature of the beast. A peripherally ported exhaust on a rotary engine will blow some fuel right out at low rpm, but this isnt even true on the renesis but will always be true on a 2 cycle engine.



Not all premixed cars smoke, street driven ones generally don't but the racers put alot more oil in and try to get smoke, on a street driven 7 with premix of a sane quantity you shouldnt get soot or smoke. It shouldnt be much different from the stock oil injection in quantity of oil, and it should burn cleaner than the engine oil it was burning in stock form. I wouldnt be too worried about emissions WRT premix.

merthonal: I would suggest using the mineral oil and not the semi synthetic. The reason i suggest this is because mineral oil burns easier and doesn't leave as many deposits. Yes the premix will lower your octane rating but not enough to cause any sort of detenation. The reason that I know this is because I was adding about 2oz. more than I should have when I first started out and my car did not detonate at all. Hope this helps.

Unlike the 4 stroke oil, the semi-synthetic, or fully synthetic 2 stroke will will not leave deposite because its synthetic base. 2 stroke oil are designed to be burnt in the combustion chamber. So I wouldn't worry about that too much.



As for increasing chance of detonation, the 2 stroke oil burns better characteristic than 4 stroke oil, whose charateristic is slight exposion, thus decreases the octane point by a little bit.

Thanks for your help guys https://www.nopistons.com/forums/pub...>/bigthumb.gif

I add about 1/2 oz. per gallon at each fill-up, but I still have the stock OMP system hooked up and functioning. It just seems like a little added insurance. At first, my rear bumper was turning black, and I thought it was the extra 2 stroke oil I was adding. Turned out to be a faulty O2 sensor. Installed a new O2 sensor and the black bumper problem went away. I put 100K on the rebuild this way and gas mileage was 24 highway and 21 city. IMHO premix is a smart move.

I have an s5 motor and turbo swapped in my car, and the previous owner was premixing it every other time he fills up. I do not know if he had the OMP removed/disabled or not but I read the electric is not that reliable compared to the s4 mechanic ones. Should I just disable it and start using premix everytime I fill? (if its not yet removed)



I live in canada and the metric system is kinda different than the US.

but with every full tank of gas, I only get about 270Km max, and its empty again. If you guys can convert that to your guys's metric system, what would that be?? I am too stupid to do the conversion, haha I think i did, but the numbers I got was hard to believe...



Anyways, besides all that, the many of you running premixes, what kind of MPG do you get? Turbo or N/A. I need to make this thing a little better on gas.... Im filling it like every 2-3 days... premixing it gets kinda annoying when using the jerican lol..

I heard about a guy in Florida who makes a mod that uses the OMP to draw 2-stroke oil out of a little tank, and send that to the oil injectors, instead of engine oil.



How viable is this info? Is this even possible?

yes here the link for the adaptor you have to use

http://rotaryaviation.com/oil_inject...p_adaptors.htm

you will also need a contained to hold the premix

here is another link that needs more work but you dont need to spend money on the adaptor

http://www.rx7club.com/showthread.php?t=37...age=1&pp=15

have fun

Hello everyone, Im new to this forum but have already found alot of great info and it seems like a really good community to be a part of. I was reading this thread about the addition of 2 stroke oil to the fuel and I have a few questions if anyone could help me out. First, I am assuming that the addition of the oil helps preserve apex seals and overall support of the rotating assembly. Any other points to doing this? Also, I know that these motors run a little warmer anyway, but with the addition of this oil does anyone recommend (tried) stepping up to a warmer spark plug for self cleaning purposes (prevent fouling if this is an issue?) Thanks

running premix makes the engine more reliable and last longer. The stock oil metering pump (OMP) can fail, resulting in unsufficient lubrication to the rotor housings. The OMP in most cases already doesnt supply enough oil to the combustion chamber, so adding premix in addition to the OMP or just switching to premix all together will guaruntee that the engine is sufficently lubricated. And alos if you completely convert to premix then you dont have to worry as much about the oil level in the motor, which needs to be constantly checked when relying on the OMP (although its always best to regularly check your engine oil level). I have never had a problem fouling plugs while running pre mix, just stock plugs have worked fine for me when running 100:1 premix of Amsoil Synthetic Premix.



John