100% Pure Gasoline vs. 10% Ethanol???? 100% Pure Gasoline vs. 10% Ethanol????
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    100% Pure Gasoline vs. 10% Ethanol????
from Ski Tar  
3/20/2009 10:09:50 AM

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 I have heard so many things about how bad running gas with ethanol is for an outboard. Well I have been unable to locate any stations in my area that sale 100% gasoline. Does anyone know for sure how bad running ethanol really is and is there an additive that I should be using that may counter act the negative effects of ethanol? My mechanic recommends running Chevron gas, I think because it contains Techron which is basically the same as adding Ring Free to your gas. Well all the Chevron gas in my area contains 10% ethanol. Your thoughts????


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   If I can from 5keepers #10346  3/20/2009 10:22:52 AM
 find 100% I use it. We have 1 station in town that is 100%.
If I am forced to use 10% ethanol while traveling I add Marine Sta-bil. You can find it many places including most Wal-Marts.


   Ethanol from ZX-Bama #14918  3/20/2009 10:28:46 AM
 I think most all gas now is at least 10 percent ethanol. I have a 225 HPDI and I am like you, I am mainly using Chevron gas. I don't know that the Techron is exactly the same as adding Ring Free. My plugs have been getting gummed up pretty bad. The last time I had my engine serviced the shop said to make sure that I use Ring Free and the were very emphatic about it.


   Ethanol Gas from BenThereToo #10492  3/20/2009 10:29:04 AM
 I am very lucky to have found a Shell Oil Co. service station that is still selling 100% gasoline, even though the pumps have the sticker "Up to 10% ethanol". The station manager told me yesterday that they know ethanol is coming but Shell in this area (Birmingham, Al.) is holding off as long as possible. Their gasoline is usually running from 2 to 4 cents per gallon more than ethanol but I am certainly willing to pay the difference, especially for my old Mercury outboard.


I have purchased the marine grade Sta-Bil additive which is the only thing I have been told to try with the ethanol gasoline. The marine grade Sta-bil requires less per gallon but cost more. I bought a bottle from Academy Sports but I am sure a lot of stores carry the marine grade. It would also be a good idea to add Sta-bil to gasoline for small engines such as lawn mower, chain saws, etc.


   our marina from Gene  3/20/2009 11:02:35 AM
 has 100% gas. Might want to call some of your local marinas and ask.


   ditto on marina from MikeF  3/20/2009 11:47:36 AM
 I use enough marine fuel to get it delivered but at least around here most marina's still sell ethanol-free marine fuels. But unless your engine is older there shouldn't be a problem with 10%. I would add Marine Stabil or Startron to it but I add it to every tank anyway.


   I don't know what.... from A.C. Hickie #10476  3/20/2009 2:38:10 PM
 part of the state you are in, ski-tar, but I've been using B-P in Gadsden and they say it has no ethanol. I only use the top grade but they tell me that all three grades are ethanol free. Even with this I still use stabil and octane booster.


A.C.


   to answer the original question.... from StevieP  3/20/2009 3:30:41 PM
 you will NOT damage your engine running gasoline which has 10% ethanol. All the manufacturers have basically said as much.


If your boat & motor are less than ten years old, you'll be fine. Some much older rigs *might* have issues with the hoses and/or tanks in the boat, and/or the gaskets on the motor, but those should be rare situations.


Prudence says to use the Marine Sta-bil, or Startron enzyme fuel treatment, to help keep the fuel stabilized.


The real risk is that over LONG-term storage, the ethanol will absorb water (i.e. vapor, condensation). If it absorbs enough, then you could have 'phase separation' where the water/alcohol mix separates from the gasoline. The water/alcohol mix would sink to the bottom of the fuel tank, right where the fuel pickup is.


Some of the best advice I've seen on this board, is to only buy as much gas as you'll use within a few weeks.


Fresh gas is your best protection against any problems.


Most people do report lower mpg figures with ethanol-blended gasolines - in cars & trucks, as well as boats.


   Y'all Got It Right from Rangerman  3/21/2009 10:30:06 AM
 Ethanol sucks and it is hard to find gas without 10%. Here in NC it is not marked as in other states. Can find some Shell and BP without it but must ask, and most times the clerk does not know. Best advise is Stabil and Ringfree and never let any gas in a two stroke get over 90 days old. Run in in the truck but not the boat.


   2 things from BASSMAN IA.  3/22/2009 1:12:17 PM
 if your not sure if the gas contains alcohol-- you can buy a test kit for under $7.00------ it only takes a second to test the gas right at the pump.


The use of ethanol is fine with the newer motors---- But you should carry an extra filter if you have been running regular gas and then have to switch to ethanol. Ethanol will break loose any junk in the fuel tank or fuel system.


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