View Poll Results: DO you pre-mix?
Yes
84
58.33%
No
46
31.94%
never heard of that
14
9.72%
Voters: 144. You may not vote on this poll
Who pre-mixes and who does not?
Senior Member
Joined: Sep 2002
Posts: 724
Likes: 0
From: "You take my car, I take your knee caps"
I dont really like the idea, oil is heavier than gas so it sinks, obvisely, i just dont like the idea of a unperfect mixer, plus i have an s5 and i was told it would go into limp home mode or something
Thread Starter
Joined: Nov 2002
Posts: 12,752
Likes: 1
From: Laredo, Tx
Originally posted by ra ra rotory
I dont really like the idea, oil is heavier than gas so it sinks, obvisely, i just dont like the idea of a unperfect mixer, plus i have an s5 and i was told it would go into limp home mode or something
I dont really like the idea, oil is heavier than gas so it sinks, obvisely, i just dont like the idea of a unperfect mixer, plus i have an s5 and i was told it would go into limp home mode or something
not the one I use bro it stays suspende in the Gasonline. Oh and the S5 will only go into limp mode if you take it off the harness jst leave it plugged in and strap it down somewhere. I think someone mentioned a device that can be lugged in instead of th OMP in S5 cars bu i am not sure.
Senior Member
Joined: Sep 2002
Posts: 724
Likes: 0
From: "You take my car, I take your knee caps"
thats pretty sweet, i didnt know there was oil that stayed suspended, might have been nice in my yz 125, i hate trying to shake a full tank of gas on a bike. I still say no though, my cars not modded enouph for anything like that,,, ya know what i mean? haha
Thread Starter
Joined: Nov 2002
Posts: 12,752
Likes: 1
From: Laredo, Tx
i did not do it because i think my car is really moded. Hell I only have two performance mods. Intake and Exhaust. But i did it because I read the article on this link:
http://fc3s-pro.com/TECH/FAQ/premix.htm
read it I was convinved by it. I also did it because it would have cost me around 100 dollars to fix all the lines and crap. And another note my car idles better now. I think that "Vacume spide" was a big leak.
http://fc3s-pro.com/TECH/FAQ/premix.htm
read it I was convinved by it. I also did it because it would have cost me around 100 dollars to fix all the lines and crap. And another note my car idles better now. I think that "Vacume spide" was a big leak.
Trending Topics
Refined Valley Dude
Joined: Oct 2001
Posts: 2,283
Likes: 2
From: Kitchener, Ontario (Hamilton's armpit)
Originally posted by ra ra rotory
I still say no though, my cars not modded enouph for anything like that,,, ya know what i mean? haha
I still say no though, my cars not modded enouph for anything like that,,, ya know what i mean? haha
It doesn't have anything to do with modding. That's incidental.
Read the link. 2 reasons why the OMP sucks - very low pressure and narrow oil dispersal. If your OMP lines are empty when you start your 7, it will be several seconds, at least, before oil finally gets to the apex seals. And the narrow dispersal means that the entire seal isn't getting coated.
When you've got oil coming in along with the gas, it's coming in at a higher pressure and much wider dispersal, coating the entire apex seals. Premix is also coming in as soon as you crank the motor, so everything is getting lubricated (meaning protected) right from Go.
Displacement > Boost
Joined: Oct 2002
Posts: 3,503
Likes: 0
From: Mississippi
I will be premixing once my engine is back together. I will not be putting the OMP back on. I am choosing to use premix in place of the OMP for reliability's sake, because crankcase oil leaves heavy carbon deposits on the rotor faces which scrapes on the housings in certain places, leaving scars that hurt the compression. Once you have torn down an oil-injecting rotary, you will see what I mean 
Microtech Tuning!
Joined: Feb 2002
Posts: 1,828
Likes: 0
From: 626 Socal
I would do it, but I don't like the idea of having my OMP still in the engine bay (S5). Plus, I don't think it would pass tech inspection at any events I plan on running in. Is there no other way around this?
Thread Starter
Joined: Nov 2002
Posts: 12,752
Likes: 1
From: Laredo, Tx
I noticed this when I ran her to see if she was ok she idled like at 850 rpm. I used to idle at 1500rpm I thought my TPS was incorrectly set but I guess not.
Lives on the Forum
Joined: Feb 2001
Posts: 26,664
Likes: 22
From: n
Originally posted by ra ra rotory
I dont really like the idea, oil is heavier than gas so it sinks, obvisely, i just dont like the idea of a unperfect mixer, plus i have an s5 and i was told it would go into limp home mode or something
I dont really like the idea, oil is heavier than gas so it sinks, obvisely, i just dont like the idea of a unperfect mixer, plus i have an s5 and i was told it would go into limp home mode or something
I've had my car sit up to 6 months at a time with the pre-mix "sitting" in the gas tank.  I peek in the gas tank showed no sediment not any signs of the pre-mix settling (i.e. the color tint was even).
If the pre-mix adheres to the most recent certification (TC-W3), it's designed to stay suspended almost indefinitely.  Unless you're allowing your car to sit in one spot for a year or more, I wouldn't have any worries it's separate.
-Ted
Haltech Dealer
Joined: Jul 2002
Posts: 1,431
Likes: 0
From: Oshawa, Ontario
When I'm putting in gas people look at me like I'm crazy, they ask me why I am putting oil in my gas tank and i tell them why. They still don't understand and then the second time i tell them it lubes the piston rings and cams.
