Please understand, I am not bragging when I make this statement, I just want everyone to know where I am coming from when I state my opinions. I am an engineer
. I was a nuclear engineer
for six years (Navy Vet and a certified fuel
tester for the Navy) then a mechanical engineer for 6 years. I am just hoping this will show that I know how to use the scientific method to prove or disprove theorems. I do not go on blind faith, I have trust issues. I will test whatever someone says to be fact. So, sorry for the long post.
I have a lot of small engines; from lawnmowers, to chainsaws, to boat motors. Some are 2-cycle and some are 4-cycle. Gasohol causes trouble with some and runs fine in others. The worst is my chainsaw. It only runs on premium gasohol or regular gasoline. My boat motor
has trouble every year. The same issue every time. The beginning of the season it is fine, but by the end it randomly stalls out and/or won't start. I am like my folks with the small motor
, the 6 gal tank lasts an entire season so the gas goes bad.
I just had a discussion with one of the only small engine
mechanics I trust on this issue this week. (Snowblower issues here in Chicago) He recommends running every small engine
dry when you are done. Don't drain the carb, drain the tank! That is important. Like someone posted earlier, it you drain the carb the remaining liquid could evaporate onto the jets, needle, etc. If you drain the tank and then run the motor dry, the engine vacuum will suck most of the fuel
out of the carb and leave it much cleaner.
We also discussed that fuel in a can stuff. He said it does work great and will eliminate all of the gasohol problems, but it costs $12 a liter here. I asked "Well, isn't that basically the same as white gas". He looked like a kid that just got caught stealing cookies from the cookie jar. He said yes, it's pretty much the same. I knew the answer before I asked. I just wanted to see what he said. White gas is a bit cheaper, too. The difference between gasohol, gasoline, the can stuff and white gas is white gas does not have any fuel additives for burning in an engine. The others have cleaners for anti-fouling
, lubricators for cylinders and pistons, etc. If you use white gas in a motor, you may need to add something. I have used transmission
fluid. That has gobs of additives. You would mix it like you mix oil
for a 2-cycle engine. A little bit goes a long way.
As for driving a long way to get a stockpile of gasoline for your small motors, well I do it. It is worth it. I don't go out of my way. I just keep a bunch of empty cans. When I am going to be driving through an area with gasoline, I bring my cans. I only have to drive a few counties over to get it, so it is not that big of a deal. If I can't, I just fill the cans with premium and add Seafoam. Stabil is a joke. Even my mechanic
won't use it. It does function like it says. It suspends water in fuel for a period of time. The problem is, what about the fuel that doesn't get the full affect? It goes bad and goes through your carb. Now you get deposits and fouling. Seafoam not only does what Stabil does, but has cleaners that break up the deposits and fouling. Nothing works perfect, but I feel Seafoam is the best legally available today. I say that because I have some carb cleaner from 10 years ago. You spray it on anything, jets, needles, spark plugs, whatever and within 30 minutes all of the fuel deposits and carbon buildup is gone. No scrubbing is required. It works awesome. The EPA outlawed it.
If you are still with me, here is the last thing. Just a few comparisons to oversimplify things.
White gas=Coleman fuel=100% pure highest grade unleaded gasoline
White gas+additives=that fuel in a can stuff.
White gas that is not pure (think alcohol you drink as in 80 proof)+additives=gasoline at the pump at varying octane levels
Gasoline+ethanol (normally 10%)=Gasohol (Gas stations call it gasoline, but it's not the same)
Gasoline+85% ethanol=E85 (Worthless stuff)
fuel=White gas+additives+lead to increase the octane
or =Unleaded pump gas+lead to increase the octane
AvGas (Aviation fuel)=Gasoline, yep that's it
or =Gasoline+lead, yep that's it too
For you diesel
is just extremely low quality gasoline. Gasoline starts off as diesel and is just refined more by "cracking". (I know it's an oversimplification)
Jet fuel (JP-5 for you military buffs)=Pure highest grade diesel, it's the white gas of diesel
As a side note, Consumer Reports just did a diesel study. They found the 5% biodiesel got the best economy and 1/4 mile time over pure diesel and higher biodiesel concentrations. Who knew?