Stupid request kind of....but how do I mix the E47. I know its 50/50 91/E85, but how do I guage it when filling up??

 

Put 5 gallons of each in by the reading on the pump

 

^ YUP

So any time you pump one you just pump equal amounts of the other. Kind of means you no longer can fill up to the top exactly.

Were you wanting to know more about running the E47 from the tuning aspect too, or was this just about how to pump equal parts fuel?

 

I would like to be running it ( hint to my tuner) and if you mix it in gas cans you can pretty much fill it up. Don't forget that anytime other than summer you will need to test the ratio of alcohol to gas in e85 as it can drop to as low as e70 in the winter.

 

Just filling up the tank

So I need to have an empty tank? I think the second to last bar have about 2 gallons left.....so from there add 3 of 91 then 5 of E for the first fill up.

 

Your first tank is always a little bit off due to residual fuel in the tank. Try to have it as empty as possible.

Here's what I do for the first tank. Find out how big it is and when near empty just pump in half a tanks worth of e85. Then fill the rest with gas ;-)

 

Run it as low as possible the first time and fill up 50/50.

 

Your over thinking this. Your fuel tank has a 13 gallon capacity. Add in 6.5 gallons of E85 ( read footnote too ), add in 6.5 gallons of 91 or 93 and call it a day for the initial fill. After that you can just do equal amounts at the pump like Psyko says. HOWEVER* As 63Nova states, its important to check content, even in summer time. An E85 checker costs $20 and takes literally 2 minutes to use. Cheap insurance.

 

I would do 7 gallons e85 then 6 gallons of 91 or 93 since you already have some gas in the tank. well for the first fill atleast then 50/50 after that

 

Or you can go to walmart baking section and get a shot-glass looking thing like I did for $1.96 It was marked with mL too.

 

I am...but murphy stay on my back

I got it now....ill fill when the light comes on...appreciate it fellas

 

Interesting, how does that work?

 

It's easy. Ethanol absorbs water, so you put an amount of water in the glass, say 20ml. Then you pour in 100ml of your fuel and mix it very well with the water. After a few minutes it will settle, leaving the gasoline on the bottom. Subtract how much water you put in an the remainder is your ethanol/fuel content. Say you have 30ml of water and 90ml of gas, that means you have 10% ethanol.

 

Ohh thats cool man

 

If I'm at 1/4 tank I go 4 and 4, 1/8 tank or below I go 5 and 5.

 

Oh man, that makes my head hurt, lol. My cyl has a fill line and percentages. I guess I'm lazy, but thats an awesome education if I'm ever stuck somewhere without mine. Thanks for that!

 

Lol it's the same thing as yours, it's just $18 cheaper

 

 

I prefer to drain the tank if switching fuel. Couldn't hurt and its not that difficult.
Currently I mix my ethanol 2:1, unlike most who mix 1:1. My ethanol blend is around e47-e57 depending on the purity of the e85 during the year and my premium fuel is 91 octane w/ 0% ethanol. But, IF your premium gas contains 10% ethanol then a 1:1 mix which will vary between ~e40-e47 depending on the time of year

Get yourself a ethanol tester and use an ethanol calculator similar to this E85 (Ethanol) Fuel Calculator

 

Thata awesome ...imma check walmart right now. Thanks
You should make a how to
Dude that calculator is kick ass thanks!

 

given the lnf has a wideband and can correct for small fluctuations the difference in e40 and e47 is no different than the upto e10 in regular fuel affecting fuel trims by at most 4% if your tuner is good he'll plan for that and adjust the injector constant for e44 so you're good with little changes. I switched to e47 and went off fuel trims to adjust my initial fill because I was at a quarter tank.

 

For sure. The LNF seems to adapt easily in that regard. This is why im comfortable running the same tune regardless of how potent the E85 fuel is anytime if the year. I was tuned in person by Area47 so im pretty confident its dialed in properly for such. Although, I still prefer to drain the tank though if changing the tune for said fuel. Just a personal preference.

However, I still think it's important to have a good idea how potent the ethanol is that your are going to run before having it tuned.

 

I was just trying to clear up for other readers the little changes in batches and if you're not spot on e47 the car will be fine. I'm sure Area47 knows more about ethanol blend tuning then I can hope to know

 

Yeah I was running an E47 tune for about a full year on my car. I would just take my truck and filled up a bunch of 5 gallon gas cans of e85 and 5 gallon gas cans of 91. Then just mix them as needed.

Yeah, the first time you switch if your car is not perfectly empty its not going to hurt anything, its better to have a little more 91 as it will run a little rich if anything.
The only hard part I found being in California is that there is not many gas stations that have e85 so just keep in mind how far you drive and where you plan to go. I would always change my tune back to 91 if I went on a long trip to vegas or anything. Also keep in mind that you are going to get worse gas milage, if its a e47 tune you will roughly get 15% less gas milage as it will use 15% more fuel. Just some things to consider. I personally loved the power of using a e47 tune as I was able to run 24 degrees timing on the top end about 10 more degrees then my 91 tune. But it was a hassle dealing with the fuel I must say.

 

I just started doing mine but do the same-5 gallon cans in truck but I mix them in the cans 2.5/2.5 so I always have mixed fuel. Keep in mind that 14% more fuel will cost you the same due to the ratio they put on e. It's the same money for all 93 and better gas mileage as it is for lower gas mileage and e47 due to e being ratio'd about 25% cheaper. At least it always is around here. Right now it's actually about 30% cheaper than 93.