Every 5th tank I fill up the car with gas and do not add any premix. I think from now on I am only going to put 5 gallons on every 6th tank.



This way I am cleaning out any buildup of premix I may be accumulating.



Do you think this is a bad idea??

no, i seem to accumulate as well, dunno for sure or not though.

to get rid of the accumulation in the tank or the motor?



mike

How would you know if you're accumulating and where? I ask since I have been going 100 to 1 or more on every fill up for a few months.

https://www.nopistons.com/forums/pub...1047683561.gif



would this be a potential reason as to why the gas gauge needle is slow to come up to full at every fill up?



Mine lately has not gone in to full

yea my gas guage rises slow as ****! but anyway i think i accumulate because even when i put less in when i fill up (i like to switch it up) the exhaust still smells of premix and considerable smoke comes out in relation of how much mix i have in,,, or think i have....whatever

My gas guage has always done that.. in fact after like 50 miles, it goes to 1/2 and just sits there lol.



Bigturbo, how much are you putting in?

I am talking accumulation in the tank. I have in the past had problems with plugs fouling so I decided when I am only going to be driving around town to just not add premix and fill it up. This way I know I am sort of cleaning out the system sort of speak.



BTW - I add 4 oz. per tankfull in an FC. I have no OMP. When I race I mix 6oz.

ah, ok thats prolly ok, you dont want to starve the engine for oil, that would be bad



mike

the stock gauges suck.



the oil pressure, fuel, and temp gauges are all junk, they utilize a bimetallic strip which flexes as a result of heating from a wire wrapped around em. That is the motor that drives the gauge, take the stock gauge cluster and throw it as far as you can.

I've premixed in the neighborhood of 150:1 over the last two tanks and don't get any smoke or premix smell. My gauge appears to work OK. Too early to tell about build-up, but I doubt that build-up will happen with tcw-3 oil, which is designed to stay in suspension in fuel indefinately.

get the rotary aviation OMP adapter so u can feed in premix from a nother source in your engine bay

This is very wierd. My guage has gotten slow lately also. I don't think it's the premix though. Is there a way you could check the tank and see if the premix is building up in there? I run .852 ounces per gallon. This works out to about 12 ounces per fillup. I've never fouled a plug do to premix either. Jim keep us posted on what you find out. Which brand of oil are you using? Have you tried switching brands?

I have been using Amsoil premix until very recently. I worked out a trade with Pettit racing 3 gallons of Pettit Protek premix.



I got a littel spastic with the premix at first and I had added too much oil and fouled my plugs. I now only add 4-6 oz. per tankfull.



Running 1 tank without premix for just driving around town once in a blue moon.

Would running way too much premix (like 200:1) cause an engine not to idle? https://www.nopistons.com/forums/pub...DIR#>/wink.png

Thats not much at all... I run 8oz per tank of regular stuff..

FYI...you guys may want to add some Ring Free from Yamaha. Its some serious **** designed for two strokes and my mechanic friends swear by it. Also one of my buds races boats also does yards and puts it in all his premix. He says since he has been doing that his small two strokes have run cleaner longer.

More than likely it can get the oil to thin and mix better off the bottom. but either way it may help with carbon on the seals as in the outboard's rings and reeds.

This is not a regular injector cleaner.

Would the ideal situation be to put some sort of gyrator/mixer in your fuel tank that always keeps the oil in suspension?

I used to add 16 oz. per tank. So 4 oz. is fin. Don't go with less than that.

I use 4 oz. because of what I have read about amsoil you can run less of it and it will behave as if there is more.



i.e. 4 oz. amsoil would equal about 6 oz. of reg 2 cycle oil.



With Pettits Protek I just do what the instructions say on their bottle. It says to use 4 oz per tankful for daily driving and 6 oz for racing.

does anyone know who makes the protek for cam? does he rebottle like red-line?

we kinda have that because of the return line back to the tank. on our efi cars the pump is pumping a lot more than the engine needs most of the time, so it recirculates it

I believe that their recommendations are for cars WITH the oil metering pump.

if youre racing it should have rnough oil to be smokeshow

I used about 1 oz. per gallon for daily driving, and I didn't have a smokeshow. When I cracked my rear housing and took apart the motor it was nice and clean inside. The rotors looked almost brand new after 16K miles. The same thing doesn't usually happen with motor oil.

When I fill up Iusually put in about 12 gallons.



So is 4 oz. per 12 gallons good? Now I am second guessing.



When I race I add 6 oz to 12 gallons.

I stick to the 1 oz./gallon rule. Less oil will still work, but you may get more wear.

1/2 a bottle to the tank, if it was racing it would be the whole bottle

What if I'm using a 1 gallon bottle? https://www.nopistons.com/forums/pub...>/rolleyes.gif

i dont know how big my bottle is, ive been hydrocarbon man this afternoon, now theres no oxygen in the building

I remember those days...or do I?

I have 8 oz bottles that I use for my premix. I will stick w/ 4 oz for street and go to 8 oz for track.

i'm using 1 quart bottles, this is getting silly i think i am gonna hook up the mop

I also used 1 quart bottles. You could always adapt a mechanical oil metering pump to the 20B.

I'd like to clear some of this up on this subject.



I think the 128:1 ratio (one ounce of 2-stroke oil per one gallon of fuel) is more sourced from the aircraft rotary-engine world of things; atleast, that's where I got the idea about 5 years ago. Those guys run a different environment with the 128:1 ratio: They run constant 5000rpm's all of the time.



Excluding racing conditions (road race, drag, etc.), for street driven applications, we should stick to something more akin to 8 to 10 ounces of oil per full tank of gas (roughly 1/2 to 3/4ounce of oil per gallon of fuel).



B

stupid question but why premix?

Our cars came stock with an Oil Metering Pump, which pumped engine oil into the combustion chamber to help lubricate the seals. If you still have this on and it works then you have no need for premixing. But because many people run synthetic oil, which isn't good for combustion or for seals, they have removed this system, so it won't pump their synthetic oil into the combustion chamber. To keep the seals lubricated they have resorted to putting an amount of oil, usually two stroke, into their gas tank every time, or most of the time, they fill up. This takes the place of the OMP. On that note, I use the 1oz per gallon rule, and usually fill up with 14oz. Although BDC raises this issue that it came from the avaition side, which I was unaware of, I still think that I will use the same amount. Only because I don't have the money to buy an extra vehicle to test amounts of oil per gallon. Although I believe Banzai is testing different brands in an engine, or at least that was what I was told. If he is I may ask him if he can test different amounts and see if his results show anything. Back on topic, I also only use Yamalube. I have used several others before, but I have found that my car seems to like yamalube better, and it smokes less. I say smokes less because, up until a few weeks ago my car had really bad stock injectors, to the point that one had a cracked end cap, and they were flooding the hell out of my system at all times, so whenever I started my car it would smoke a lot. Unfortunately I haven't gotten my car running since then to see if the smoking has decreased, or to see if the amount of oil that I'm adding is causing it to smoke.



- Hand

With all due respect.



Have you ever seen a rotor housing from an engine that relied soley on its OMP for lubrication?



Have you seen one that used premix?



The OMP housing has a nice shiney line around about 1/2 to 5/8 of the housing down the center. The line is about 1/8" wide. That is the extent of lubrication the OMP delivers.



I for one did not want to premix it is a lot of hassle and I honestly didn't want the mess or trouble of buying and adding premix at every fill up.





When Kandy @ Pettit racing pulled the 2 housings for me to see I was sold on the fact that premix is the way to go. The OMP is garbage.



Pettit just tore my engine down for a street port and 3mm seals. The first thing he said was that I must be premixing because my housings had barely any sign of wear.



I was using Amsoil premix and still have a case of it. I am now using Pettits Protek premix. It was designed w/ rotary engines in mind.



I keep the Amsoil for road trips because it is in 8oz bottles and is easy to add at fill up. I use the empties for my Protek because it is in 1 gallon containers.



Go with premix you will not be sorry.

bruce from rotary aviation builds all of my motors and he told me 1/1 on oz/gall.

Jims, you seem to have a lot of experience with this stuff. What is the difference between me using the standard Castrol or other easily available TCW3 stuff vs. the Pettit or Amsoil? How are they better? I figure I'm already doing my engine enough good by premixing rather than OMP.



Chris