# Anybody here good at the maths?

#### 5-7HEAVEN

##### Well-Known Member
You are not suppose to mix the gas in your tank, most kits say that is a no no you could be right out of gas or close pour it in all the oil hose to the carb bowl and gas line very little left over any eqausion.
Also you may have half a 5ank of gas left it's going to be crazy f*** up on adjusting values.
Make it easy on your arithmatic brain function get a 1 gallon DOT approved container use what ever it stars on the oil container but 64.1 is way to lean you'll burn your motor leanest I would ever go is 32.1gallon, 25.1 gallon not bad either.

Just fill your tank every morning before you ake off

I don't like mixing in and storing gas, nor do I like gassing up every day.

I had a gallon tank on my last bike. My Tanaka engine averaged 66mpg, enough for 5 days' rides to work.

I knew when my tank was half-full or less.
I'd go to the gas pump, add a quart of gas, then pour my pre-measured oil in, and pump another quart in.

The major sloshing from the gas nozzle was enough to mix the gas.

My engine never protested.

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#### CrazyDan

##### Well-Known Member
You are not suppose to mix the gas in your tank, most kits say that is a no no you could be right out of gas or close pour it in all the oil hose to the carb bowl and gas line very little left over any eqausion.
Also you may have half a 5ank of gas left it's going to be crazy f*** up on adjusting values.
Make it easy on your arithmatic brain function get a 1 gallon DOT approved container use what ever it stars on the oil container but 64.1 is way to lean you'll burn your motor leanest I would ever go is 32.1gallon, 25.1 gallon not bad either.

Just fill your tank every morning before you 5ake off
Wow, other than the occasional typo this is one of the best posts I've seen you make. Good wisdom and intelligence with none of the crazy.
Inspector is right that mixing in tank can be hell on getting the correct ratios, and that you can get a fuel line full of just oil if you start with the premix first on an empty tank. 5-7's method works if you are fast, but then you are still dealing with working out the math for each refill.
There is nothing wrong with storing premixed fuel, you just gotta shake it up a bit before refills to make sure it's evenly mixed.
I know it's not advised, but I have successfully used Gatorade bottles with gasoline for years on my bike and a white gas/gasoline camp stove with dozens of refills. I just made sure I didn't fill to the top and squeezed the air out for expansion, no problems.

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#### 5-7HEAVEN

##### Well-Known Member
Wow, other than the occasional typo this is one of the best posts I've seen you make. Good wisdom and intelligence with none of the crazy.
Inspector is right that mixing in tank can be hell on getting the correct ratios, and that you can get a fuel line full of just oil if you start with the premix first on an empty tank. 5-7's method works if you are fast, but then you are still dealing with working out the math for each refill.
There is nothing wrong with storing premixed fuel, you just gotta shake it up a bit before refills to make sure it's evenly mixed.
I know it's not advised, but I have successfully used Gatorade bottles with gasoline for years on my bike and a white gas/gasoline camp stove with dozens of refills. I just made sure I didn't fill to the top and squeezed the air out for expansion, no problems.

Lol, Dan, that's EXACTLY what happened when I had my 460 engine!

Actually, I meant adding oil after pumping in a quart of gas.

Yep, I added oil, then got delayed for some reason.
The oil settled near the petcock and failed to mix well.

So I drained the tank and started over.

Like Dan said, ya gotta be fast, when mixing oil at the gas pump.

#### Wrench

##### Well-Known Member
Put the oil in first then add the gas at the pump. That mixes it up. That's the way I used to mix the oil and gas on my 1970 KZ 100 back in 1977

#### CrazyDan

##### Well-Known Member
Put the oil in first then add the gas. That mixes it up
Not if you ran out of gas and the oil fills the gas line before adding the fuel. As 5-7 said when adding oil at the pump, it's best to add some gas first, put in the oil mix then immediately add the remaining gas. Give it a lil shake for good measure. Adding the oil first is asking for a hard start with mostly oil then the rest of the tank almost just gas with little oil. This is why I am a 4 stroke man. Ride up to the pump, fill up and go.

#### Frogslayer

##### Well-Known Member
It shouldn't fill the line if you shut off the petcock.

#### Wrench

##### Well-Known Member
Not if you ran out of gas and the oil fills the gas line before adding the fuel. As 5-7 said when adding oil at the pump, it's best to add some gas first, put in the oil mix then immediately add the remaining gas. Give it a lil shake for good measure. Adding the oil first is asking for a hard start with mostly oil then the rest of the tank almost just gas with little oil. This is why I am a 4 stroke man. Ride up to the pump, fill up and go.
OK, If I ever get a 2 stroke again I'll remember that.
Me too gas and go with my 4 stroke.

#### 5-7HEAVEN

##### Well-Known Member
Not if you ran out of gas and the oil fills the gas line before adding the fuel. As 5-7 said when adding oil at the pump, it's best to add some gas first, put in the oil mix then immediately add the remaining gas. Give it a lil shake for good measure. Adding the oil first is asking for a hard start with mostly oil then the rest of the tank almost just gas with little oil. This is why I am a 4 stroke man. Ride up to the pump, fill up and go.
Dan, that's EXACTLY what happened to me.

I forgot to close the petcock. The oil that I added flowed into the line.

So there was no way to calculate the weakened fuel mixture.

So I drained the tank and started fresh.

#### Chainlube

##### Well-Known Member
Dan, that's EXACTLY what happened to me.

I forgot to close the petcock. The oil that I added flowed into the line.

So there was no way to calculate the weakened fuel mixture.

So I drained the tank and started fresh.
Drain the line into a cup, close valve and add what's in the cup back to the tank. The tiny bit it might be off isn't going to eff your motor.

#### mark20

##### Well-Known Member
Hmm, all we need is someone to figure out how to add oil injection to one of these motors, like on older 2 cycle mopeds and motor cycles

my yamaha has this system, you can put regular gas into the tank and then you add 2 cycle oil into another oil tank.
it automatically adjusts it to the correct mix. Its been working great so far with zero issues.

Any machinists out there wanna make some money?

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