ericiscool - 4oz/10gal would be if the OMP was still running. For pure premix, 1oz/gal is roughly the right mix (though technically, 100:1 is a bit more, 5oz/4gal is close).

I have a few various sized STP bottles, a gallon Walmart bottle, and assorted funnels & such in my car. The STP bottles work great, they just stick in the fill spout and drain. I have a glass rod I use to hold the flapper open, it goes significantly faster that way.

Regarding resale value, at this point '7s mostly end up going to other '7 fans. In terms of resale, I suspect that having a rebuilt engine that has only run premix is probably about on the same level (or possibly better) than a working oil injection system, given what has been discovered about carbon buildup (nutshell, OMP = nasty carbon, premix = clean insides).

-=Russ=-

 

didn't think about that... good point!

 

Bah, sealing properly... if you don't get to your destination smelling like '7, you're not doing it right.

After a 5 hour drive to pick a friend up, I get there, walk in, she sniffs me and says "You smell like car."

-=Russ=-

 

What's the premix ratio for S5 turbo in LITRES for us kiwi boys in New Zealand, I can't find a conversion chart for your galons/oz etc.

 

1 part per hundred. so like 1/2 a liter per tank. tanks about 50 liters rihgt?

 

Cheers for that, I'll try it.

 

for some reason i cant seem to understand all the facts about using premix. could someone answer these quick questions?

- do you still have to fill your car up with oil and do oil changes?

- where is the cheapest place to buy 2 stroke oil?

- how much 2 stroke oil do you put in a fill taknk of gas?

- waht other advantages does premixing have over regular oil?

thanks for any answers.

 

YES! The crankcase oil still has to exist, to lube the bearings & help cool the engine & such. It is not injected into the intake stream, but still has to be present or your engine will die VERY quickly.

I get WalMart stuff - $3 or $4/gal, and then put it in smaller containers.

100:1 mixture. The container will have the needed info, but 1oz/1gal is 128:1, so a bit more (I think I use 4oz/3gal when planning on driving hard, else 1oz/gal).

Well, it's designed to burn, leaves a lubricating layer, and leaves a LOT less carbon.

-=Russ=-

 

is marine synthetic ok??

 

Quick Question.
I dropped in an S4 engine into my S5 vert and instead of changing the front cover for the engine to go with the S5 OMP i just left on the S4 iron and the S4 pump. I WAS going to route the omp connector rod to my modified throttle body bracket but unfortunatley can't route it without it hitting some stuff that is quite in the way. So i left on the OMP and it runs at the lightest setting all of the time and i have been running premix since strating my car up for the 1st time and driving it. I use about 15oz. of premix per tank, should this be good enough or should i add a tad bit more?
Thanks,
Matt

 

Well, since the tank is something like 12-13gal, and you're running 15oz premix per tank, you're running around 110:1 or so.

At that point, you may as well remove the stock oil injection system - you've got enough premix to take care of all the lubrication needs, and the oil injection is just adding carbon.

-=Russ=-

 

"is marine synthetic ok??"

I'm not sure what you mean by marine synthetic, but any oil w/ a TCW-3 rating should be identical. I run stuff made by evinrude because we had boxes of the stuff in the basement from an old two stroke outboard we got rid of... it's all the same stuff
Patrick

 

thanks than the marine outboard should work fine

but i have a problem i put normal 2 stroke oil from a gas stasion its at half a tank sould i stop runing it and drain it or is it ok???????

what should i do??

 

This is totally not intended to rip on you whatsoever.
How am i able to fit 18.5 gallons of gas in my 13 gallon tank?
lol dude if you don't know don't guess. the stock tank is a wee bit bigger than that http://2ndgenrx7.freeservers.com/cgi...2992/1990.html
18.5 gallons for the year of vert i have.
But i do totally agree with you on removing the oil injection system and you gave a good solid reason. i'm just too lazy to do it right now
Matt

 

You're right. I was thinking of... something else. Maybe I was thinking of the fact that I usually fill up at 1/4 tank and put in 12 gallons or so, with 14-16oz of premix. Also, I didn't realize that the 'verts had bigger tanks. But... yea, I have no idea where I came up with that small of a tank.

But my point still holds. You're running almost enough premix to fully lubricate the engine on it's own. You're obviously not opposed to adding 2-cycle oil to your tank, since you do it already. And the benefits of running premix have been made very clear in other threads (basically, clean engine internals after an engine with the stock system is nicely carboned up).

-=Russ=-

 

how do you know if the OMP fails on an s4? will it actually go into a limp mode?

 

odds are it won't. It's all mechanical and they very rarely fail. and since it's mechinical and not electrical it doesn't have a limp mode.
Matt

 

While rebuilding the engine, you observe that there's no fresh oil in the lines leading to the injectors.

This is another advantage of premix - as long as you put premix in the tank (it takes, oh, about one fillup to get used to doing it), if your oil injection system fails, you notice really quickly, since the engine will not run without it (that whole needing fuel thing).

-=Russ=-