Question about Premix RX7
 

I have the following question about premix:

What is your fastest way to get the proper amount of premix (2 cycle engine oil) and put it into the RX7 gas tank at the moment when you fill it at the gas station?

Right now I'm using a plastic needle that I get from the hospital to measure the premix. But it takes a few pumps and some time to measure the premix and fill the tank. I was thinking in another idea: To use a measure cup (the one that our moms use at the kitchen) and a plastic funnel to measure and put the premix into the tank.

What another methods do you use?

try searching "premix". I believe the most common is to dump a full quart in when putting in a full tank of gas

I searched but I dont found that.

Anyway, that is a good choice.

Any other ideas?

considering the rx-7 omp runs 100:1 fuel to oil ratio.. that come to about 1.3 ounces to every gallon. what i do is 1 ounce per gallon and add an extra ounce for every 3. the two cycle bottle has a way to measure on the side of it. some bottles are hard to read but when u find a good one, just keep it and buy 2cycle by the gallon. if u end up with 8.6 gallons. just round it off and pour in 12 ounces. done :) some may think 1.3 ounces per gallon is to much but i dun care :D

1 oz per gallon of Gas.

Since I don't have an OMP on the RXX-7, I have add 2-stroke oil when I fill up. I found a brand of TCW-3 oil at Target a few years ago (they don't carry it now) that came in a translucent, plastic bottle. The bottle has the capacity marked in millilliters on the side. Since I use 25 ml oil/1 gal gas, I pre-fill a few of the bottles with 300 mil of oil. At the gas station, I dump in the oil, then add 12 gal. of gasoline.

If you don't want to carry several bottles, use one to measure the oil as necessary. That's what Rick Potter and I did on his FD during the One Lap of America.

If you check at various garden supply or auto supply stores, you can find other brands that have similar bottles.

what about the other stuff.. like the high blend of the 2 cycles? like the synthetic ones. do you do the same with that stuff? just every ounce a gallon.. or more to say a pint per full fill.

i work at a liquor store, and i've been wondering if i should stock up on pint size bottles(half a quart) and store the 2 cycle/stroke oil in it . keep it in a box for an occasional full fill per pint.

+1

To the best of my knowledge, it's a matter of volume, not quality. I have never heard of anyone suggesting that you could use less of some premium brand of oil. Two objections to the pint liquor bottles:

1) keeping glass containers in a car just doesn't sound safe to me

2) (being a bit paranoid) I can see some a*****e cop writing a ticket based on the "open liquor container" law.

I have a 20 ounce water bottle that i have measured out 2,3,4,5,6,7 ounces and just fill to whatever line i need to

Where did you find that information?

true... i wouldnt want that either... but i'd probably peel the labels off or probably use a different approach... stupid law!!

i use an ols HEET bottle i found in the garage, it holds 10-12 oz has a long skinny neck and i always put in gas at around the 10gal. mark

dont mean to bring this back from the dead for such a noob question but it must be asked! is two stroke oil and premix the same??

Yeas sir it is and i def wont flame you cause im just as new as you question about premix ams oil saber safe premix???

Wait a min!

Am i supposed to be adding oil to my gas tank when i fill up?

do you still have your omp???

My what?

And what is a omp?

chis-thanks!

fastboy- you dont have to but apparently it increases engine life
https://www.rx7club.com/general-rotary-tech-support-11/premix-increase-engine-life-742411/
:)

1 oz per gallon is DOUBLE what i put into my tank. i put in 8 oz and thats it. sometimes as much as 10 or 12

As much stuff as I have read on this site this is the first time i am hearing about this.

Someone should have prepared a newbie starter kit or care package so those who dont know and are new to this wont find out on the side of the road.

Every car that i have and have had i have always run a quart of trans fluid in my tank every 5 fillups or so. this is an old racing trick from way back in the day. It keeps your lines, injectors, and fuel pump from building sediment.

but this is the first time i heard about the lawn mower oil in the mazda. This should be a sticky. Alot of people dont know!

I just kind of eyeball it with the handy translucent measuring strip on the side of the bottle. I generally aim for about 1/2-3/4 ounce per gallon or so.

BTW - Thanks soulrider & chis57

I just bought this 2-cycle motor oil mixing tool at walmart and it does a good job, can inject 2 oz at a time. Looks like a giant syringe.

no problem man tonight is a good night guys i haven't gotten flamed yet =p

i might remove omp on my new motor any suggestions on a yes or a no?

Worry not.

IF you check the FSM and calculate out the amount of oil the OMP injects and then convert that to a per gallon ratio, it comes out to like 300:1....you'll be ok.

Worry not.

IF you check the FSM and calculate out the amount of oil the OMP injects and then convert that to a per gallon ratio, it comes out to like 300:1....you'll be ok.

A small, mythological creature that plays tricks on RX-7 owners--similar to an imp, but more specialized. :)

do i have one if im not a warlock? O_o
haha jk jk lol

Ive put 150k miles on my car and never found a need for premix. Since Ive kept it under stock conditions ive never had a single thing break on my 7 that I can remember. I always figured if you need to do all of these special things to your rotary then the factory would address it more seriously

The only reason the factory didn't implement it is because they knew perfectly well that the average owner would neglect it. The absolute largest problem with 4stroke is carbon. Yes, it works, but in the end it'll foul up the engine considerably more-so than 2 stroke. If you can be trusted to premix consistently, then it is ideal to do so and will reward you in the end. You'll discover the 'need' for premix if ever the engine is taken apart, or on more demanding performance conditions.

yeah, but you cant expect your daily normal drivers to go through all that shit... I mean fuck, most of the dumbasses in the world today wont even open the hood the entire time they own a car to even check oil, the air filter, coolent level... etc, let alone go out in the rain and measure oil and dump it into their gas tank every time they get gas... maybe the people who car about there cars yes, but theres too many lazy bastards in the world, and mazda knows that.

lol ifryrice... well said? hahaha

Haha, indeed! Ideally, it'd have been a secondary storage tank that would be metered through the existing OMP (Kind of like the kit you can buy that adapts it to do just that), but I'm pretty sure mazda knew people would ignore/neglect it, so they compromised.

You dont need a needle you can pour directly from the bottle and use the lines on the side to measure. It's not an exact science, just get the amount close.

Though ya that adaptor or the stock OMP is better IMO. Too much trouble to do it manually.

i've always used those 12oz 2 stroke oil bottles from walmart (blue bottle) when i started premixing. i just keep four or five in the car at all times. when they go empty, i just refill the 12oz bottles with the same oil that is sold in the gallon containers. one bottle per fill up. i tend to let my fuel level go down pretty low before i gas up. just a habit of mine. its been working fine for me.

hope that helps the newbies. i asked tons of questions when i first started.

That's what I've always done.

what spark plugs do you use when premixing?

stock spark plugs.

btw... why dont they make them things for an s5?

my stock spark plugs keep fouling with the premix oil. The only one that are working very good with premixing are the Bosch +4 4477

I wasn't aware of Bosch plugs made for the 13b. Those +4 plugs suck but you're probably running too rich a mixture.