** Mixing Gas and Oil Question

[BuickTurboSix]

OK - You all talked me into mixing and I ran the first few tanks this last weekend. Hey, it even worked - felt very strange though not having or filling a Oil tank!!! :rolleyes:

Anyway, here is my question. I have a built in 40 gal tank. What is the best way to mix? Is putting the oil in the tank and filling with gas going to do a good enough job. That is what I did, but I did wonder about how well it mixed up.

I really don't want to mix 5gal at a time and than transfer to the tank. I would be at the station all day.

Throw some ideas and confidence builders my way!!!

Thanks again for all the info on this site. It has been great!

Tom :cool:

[Balzy]

will fit in the tank. Then put in about 5 gallons. Then put enough oil in to mix up the ratio for about 3 to 5 gallons less than I expect the tank to hold. Fill it to that amount, look at your gauge again and take another guess. Put in enough oil for about a gallon less than you think. At the end I can always get about 1/2 gallon in after the pump shuts off so I put in the last of the oil and finish the last 1/2 gallon. Basically, do it in stages so it mixes well. i always have a 15 mile drive to the lake anyway after filling so it can mix on the way. The best way would be to do it from jugs though. On the water you don't have that option though.

[Clint]

But when I add oil I don't stop pumping fuel. I pour the oil right over the pump nozzle and it runs right into the fuel stream. For what it's worth the oil and fuel wash down the fill line together, I feel it helps mixing. The guy that fills up right behind me surely has a few choice words for me:D :D :D

[Techno]

I have a new way that I still have to try.

first cheat.
My gauge is a smart gauge that is calibrated so it tells you how many gallons. You don't have to pump first, the gauge reads gallons left or to fill.


2nd cheat.
The measuring cup measures gallons(of gas), not ounces-
This is something you have to mark yourself for your oil ratio.
Without the smart gauge I would pump in the majority of fuel- for you say 20 gallons(assuming your not empty).
Add oil to the measuring cup to the 20 gallon line(2 qts of oil). Pour it in and top off the tank minus the needed oil.

Your 40 gallon tank is a 39 gallon tank.
40:1 is 40 gallons gas - 1 gallon oil. 39 gallon of gas with less than 1 gallon of oil is 40:1. Now if you added a gallon it would only change to 39:1

A further cheat I'm doing is a pump, valve and cup as a system. Its a form of oil injection but for the tank.

The agitation from pumping mixes it and so does the ride. I've asked this mixing thing and it has to mix easily. I wouldn't put too much oil in a nearly empty tank.

One other thing I've checked is the accuracy of measuring. It need not be that accurate. If you don't believe this take a given amount of fuel and divide it by your ratio. This is the oil. Now change the oil amount by what you consider a considerable amount.
20 gallons at 30:1 is 20/30=.6666gal*128 for ounces or *32 for qts - =85.3 ounces.
Ok I whoopsed and only added 80 oz or 90 oz. A 5 ounce mistake.
32:1 Huge change! 5oz less than required
28.449:1 and 5 oz too much oil.

Done for 40:1
20 gallons
40:1=64 oz or 1/2G
43:1=59oz
37:1=69oz.625

This is a 5 ounce example. Depending on your measuring cup this shouldn't be this large.

[BuickTurboSix]

I thought about something where you could pour the oil in one filler and gas in another and they would mix as they enter the tank together. Kind of like a "Y" line or something. Tell me what you are talking about here.

"A further cheat I'm doing is a pump, valve and cup as a system. Its a form of oil injection but for the tank. "

Also, thanks for the "39 gallon" thought. I didn't consider that and the percentage of error calculations. It helped a lot.

Tom :cool:

[BuickTurboSix]

One thing I did want to tell everyone - I picked up a neat funnel at Walmart. Maybe everyone knows about them, but it was new to me.

It is a see through funnel with a screen filter in it, long clear extension tube and a on-off valve. It is measured in ounces, cc's and more. Anyway, you can pour 32oz into it. Open the valve and down it goes. Close it and repeat. It worked great for the measuring part of the process.

:)

[speed]

i still have to stand by the old 5 gallon at a time routine. it takes longer but all i have to know is how much oil to 5 gallons. i also mix half and half vp race and pump gas . i take my 15 gallon drum to vp fill 7 gallons put in oil go to gas station and add 7 more mixes it up well it is along process but a think it works well.

[Techno]

You need a pump of some kind that will pump oil.
A measuring cup, I built mine from acrylic tube and have twin tubes for capacity. It has to be a closed cup so it stays clean.
A switching valve. I don't know the proper name but it swaps the plumbing around. I built that too.

The pump is valved to suction from a 5 gallon fuel tank full of oil. This discharges into the measuring cup, its marked in gallons of fuel pumped into the gas tank. So there isn't any figuring its done on the cup. Once you have the amount, you pull the valve and it switches the plumbing.
The pump now suctions from the measuring cup and discharges into the main fuel tank.

I keep meaning to post this on my site and keep forgetting.

[BuickTurboSix]

I got to see some pictures or a diagram of this one. Sounds pretty interesting.

Tom

[JW]

I printed off the 'Promax oil-injection removal' post just a little while ago, and now I get to read what a pain in the a$$ it is to have to measure/mix the oil. Motor warranty long gone, but sure is nice just to pump the gas and go. Fill the oil tank every other week.
Has anyone EVER attempted to change the plastic gear out for a metal one????

[Techno]

Its not a pain to some. Some put on their lab coat and break out their flasks.

Its really not a big deal but the curse is pumping in 15 gallons then measuring out the oil, the cup is too small so you add enough for 10 gallons and do it again. "What was that number?"
"Don't talk to me while I'm doing this!"

Mark a cup in gallons and most of the hassle is gone. Keep a rag handy and some diaper wipe- like hand towels.

Figure a way to keep everything clean, zip lock or something.

The plastic gear is only part of the problem, if your trying to move oil at the high RPMs its a lot more oil to move. If something goes wrong then you don't have any oil. You might have stripped metal instead.
So you put it in the fuel and eliminate a bit of mechanical failure.

[BuickTurboSix]

Not defending the technology or logic, but my guess is that they used plastic instead of metal so that if there is a pump failure, you strip out a easily replaceable gear. If it were metal, you run the risk of what is driving that gear stripping instead and then you would have to crack the cases to repair.

After all I have read, I would say the pulse pump from OMC is a better route for a stock motor application. However if either one fails and does not warn you, you are going to have to pay for the repairs, not the engine MFG. So that is why the mixing seems to be the clear ticket.

I am surprised no one has put together a good all inclusive kit that has all the best parts you would need to make the conversion. Hmmmmmm!!! :D

It actually didn't go to bad mixing. And, I am thinking about a "Y" line set up for the fuel tank. That way I could pour oil while the Gas is going in. Would not be too hard at all.

Or

Have one of the kids do it!!!! :D