Lawn Mower Fuel Brand Experiment

[n0rt0npr0]

yeah this gasoline has been "effecting" me...

look now...
see if that makes more sense...

[krousdb]

ok, three runs, average 1322 seconds +/- 1.1%. Very nice. Should prove as a good basis for comparison. Compaq says Shell is the best. If so, it should get worse from here.

[n0rt0npr0]

It should yes.

And man I can't take it, I'm doing a warm-up run right now, I am going to test acetone and coleman fuel together with the rest of this Shell fuel I have. I may not come up with three 200ml runs, but I just wanna see what it does.

[zpiloto]

The run times are quite a bit longer than the first attempt. Do you think this is because of the accuracy of measuring or the 10 degree increase in temperature? If it temp, thats a new factor to look at. I think CITGO will give the longest run time.

[krousdb]

Im thinking by adding acetone and coleman, you are changing two variables. Can you do one run with each?

[n0rt0npr0]

The run times are quite a bit longer than the first attempt. Do you think this is because of the accuracy of measuring or the 10 degree increase in temperature? If it temp, thats a new factor to look at. I think CITGO will give the longest run time.

Yes they are but its too early to even start guessimating.

Im thinking by adding acetone and coleman, you are changing two variables. Can you do one run with each?

Okay I will do one test with every combo. I have enough fuel. One with acetone, one with coleman, one with both. We've been graced with seriously calm weather, I had to take advantage!

[Compaq888]

this is weird. Mobil runs longer than Shell, really weird.

[krousdb]

Originally Posted by Compaq888

this is weird. Mobil runs longer than Shell, really weird.

I think all of the tests so far have been Shell. Mobil is next. I'm betting no significant difference between any brand, except for Sunoco. IIRC, Sunoco uses 5 or 10% Ethanol. At least that is what is shown on the pump in my town. If so, I expect it to run 21 - 21.5 minutes.

[Compaq888]

Originally Posted by krousdb

I think all of the tests so far have been Shell. Mobil is next. I'm betting no significant difference between any brand, except for Sunoco. IIRC, Sunoco uses 5 or 10% Ethanol. At least that is what is shown on the pump in my town. If so, I expect it to run 21 - 21.5 minutes.

you're right. He just made the test better.

[n0rt0npr0]

Damn. I truly did not think things would get so close. No more rounding up...

The constants in this round are:
-Three 200ml runs (warm runs)
-Barometric Pressure remained statisticly constant at 29.33in - 29.35in
-Measurable windspeed stays between 2.5mph and 1.6mph
-Same Shell gasoline
-15 minutes between runs to restart.

Run #1 Coleman&Acetone
-Length: 22:05.00 minutes
-Temp remained within 48°F
-Humidity was 33% - 34%

Run #2 Coleman Fuel alone
-Length: 22:03.94 minutes
-Temp is exactly 49°F throughout
-Humidity: 32%

Run #3 Acetone only
-Length: 22:04.43 minutes
-Temp spread is 48.5°F - 49.2°F
-Humidity: 32%

Interesting.