2 Cycle Oil in Gasoline

Al · Mar 23, 2015

I am going to run a test of an 8 cubic inch Briggs Engine. I have mixed 30 cc TC-W3 per gallon of gasoline. The engine drives a generator. I have a digital KW meter which counts time and KWH. I intend to do at least a 5 hour test on the oil in fuel and on the regular gasoline. I have a brand new spark plug installed for each test to try to eliminate erors.

Should be interesting. I'll post the results.

Rand · Mar 23, 2015

5 hours is nothing. Should make it at least 100hours so deposits can form.

30ml =~~1oz = 128 to 1 ratio?

JHZR2 · Mar 23, 2015

How are you going to ensure a truly constant load? The efficiency of the engine differs at different load points, so unless you do constant load at constant temperatures, or do a statistically significant set of replicates, this wont tell us much...

Al · Mar 23, 2015

I have an electric heater that draws 1195 watts but minor variations will be captured in the KW Hours reading.

Originally Posted By: Rand
5 hours is nothing. Should make it at least 100hours so deposits can form.

30ml =~~1oz = 128 to 1 ratio?
I am strictly interested in short term efficiency. That is the test objective. As you figured one ounce per gallon.

But really I doubt there would be deposits as normal dilution is 50 to 1

JimPghPA · Mar 23, 2015

Originally Posted By: Rand
5 hours is nothing. Should make it at least 100hours so deposits can form.

30ml =~~1oz = 128 to 1 ratio?

What is the recommended ratio?

128 to 1 seams like way too lite on the oil.

JimPghPA · Mar 23, 2015

Using the Evinrude recommendation of one pint to six gallons of gasoline, would mean you want to mix 79 cc of TC-W3 to one gallon of gasoline.

Al · Mar 23, 2015

I realize the ratio is light if it were a 2 cycle. Its a 4 cycle. Just looking to see how a lesseer quantity works to boost efficiency..if at all.

Charlie1935 · Mar 23, 2015

I use 1 ounce per 5 gallons in my pick up trucks and the briggs powered John Deere mower. The mower had the most noticeable difference. Cut fuel consumption noticeably in it. Still has original spark plug after 5 years of use.

Oil Changer · Mar 24, 2015

Sounds like a waste of both fuel and oil to me but have fun.

bubbatime · Mar 24, 2015

Two much oil in the fuel for a 4 cycle. You want a maximum of 200:1 on a 4 stroke.

Charlie1935 · Mar 24, 2015

Most users of TC W3 use a ratio of 500 to 700 to 1.

Al · Mar 24, 2015

Just did a 2.5 hour run. I did use the output to run resistance heating in my house. 1 gallon for 3.4 KWH. Thats like 10% efficiency.

Jetronic · Mar 25, 2015

did you use pure gasoline?

Shannow · Mar 25, 2015

Originally Posted By: Al
Just did a 2.5 hour run. I did use the output to run resistance heating in my house. 1 gallon for 3.4 KWH. Thats like 10% efficiency.

It's sobering, isn't it ?

NG prices here have hit parity with unleaded (and will soar further)...but I can't burn unleaded neat to heat my home.

Al · Mar 25, 2015

Originally Posted By: Jetronic
did you use pure gasoline?

No that's with the gasoline and oil. If there is no measurable improvement it might say that using a mixture of say 700:1 would be totally like using a placebo.

I will be doing the secone 2.5 hour run this afternoon again on oil and gasoline.

Al · Mar 29, 2015

I have approximately 2 more hours to run on straight gasoline. A number of things have prevented me from completiong the test. I won't be able to finish it til Tuesday. It is looking like there will be no difference, unfortunately. I am surprised.

Shannow · Mar 29, 2015

Hey Al, an experiment is an experiment.

For a test like this, the energy content in the tank over time would expect no real change.

two machines side by side, wearing out/fouling may show some differences.

Alas, you've not got a "butt dyno" in this case.

Al · Mar 29, 2015

Originally Posted By: Shannow
Hey Al, an experiment is an experiment.

For a test like this, the energy content in the tank over time would expect no real change.

two machines side by side, wearing out/fouling may show some differences.

Alas, you've not got a "butt dyno" in this case.

Yea. All I can do is see if the oil gives a bit more efficiency by cutting down on ring friction. And I can read total KWH for each gallon of fuel. Two gallons each run. Since the engine has no cat, it can't hurt.

Jetronic · Mar 30, 2015

ring friction would be more apparent with a lightly loaded engine.

Al · Mar 31, 2015

Results are in. 5 hours test on 2 gallons. Each performed with 128:1 TC-W3.

Test with the oil in gas yielded 7.3% greater output for the same 2 gallons.
I will repeat the test again but this time do a continuous 5 hour run instead of breaking it up into multiple runs.

2 Cycle Oil in Gasoline

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