Problem with mixing gas with E-10 with gas without

General Boats and Motors
1

I know about all the marine engine problems resulting from ethonol; however, I was recently told by a yamaha mechanic that if you mix gas with ethonol with ethonol free gas you will run into more problems than if you are just running E-10 fuels. Has anyone else ever heard this or know if there is any truth to it?

I’ve got a source for getting ethonol free gas on occasion, but I don’t want to run it if when I have to fill up with E-10 it’s going to cause problems.

2

Definitly stick with one or the other. I think that’s what that goopgunkjellycrud stuff I’ve been seeing in some fuel tanks is from.

Russ B.
Psalm 55:22

3

I don’t think it is a problem going back and fourth. The old fuel with a different preservitive MTB??? or something like that would not mix with E10. That has been eliminated I think and E10 or without is ok to mix. Some searching on the internet will provide a lot of info.

The gunk in your tank is probably the old varnish that E10 has broken free.

Hewes Redfisher 18, Suzuki DT140

4

Thanks for the opinions, but they are conflicting. Anybody else want to weight in on this?

5

As far as I know, Both the Gov’t and Oil Companys are trying to “phase out” MTBE Fuel (read: Not E10) because it’s more expensive (Oil Co’s reason), it contaminates groundwater, and is allegidly more polluting (Gov’t Reason).

So to answer you question: Mixing E10 and MTBE fuel can cause problems because each don’t really like each other. If you find gas that is Non-E10, it has MTBE in it. As far as I know there’s not another additive out there. Mixing the two is like playing russian roulette, it’s entirely likely that you won’t have any problems, but when the Ethanol Monster strikes, he usually bites hard.

Baker
Old, beat up 17’ McKee

6

rebel 17 is dead on, unless the non ethanol gas doesnt have MTBE

MTBE doesnt mix with ethanol

I’m now at www.teamcharlestonmarine.com

7

So buying fuel from the exxon on the corner of ladson and dorchester rd is a bad idea?

Man I hope someone sues the shiat out of someone before this is over with!

8

Thanks for the replies. Sounds like unless I can consistently get non-ethanol gas, I’m better off running E10.

9

I’ve been refilling my boat with half a tank on average for about 9 times now from the Exxon in Oakbrook. I haven’t had any problems so I think I have most of the original e10 gas run out. My question is everytime I take the boat to get gas, I top off the gas in the truck which was filled with e10. Does the ‘don’t mix’ rule include vehicles?

10

Good question. Sounds like it is a chemical reaction between E-10 and MTBE and if that is the case it seems that it would be just as bad for cars/trucks as it would be for marine motors. Maybe it still hinges on vented fuel systems or the amount of time the fuel sits in the tank. Odd that don’t really hear much about fuel issues outside of marine applications.

11

havent heard of any issues with autos, but not sure
buying the non ethanol gas is fine, as long as you arent mixing.

I’m now at www.teamcharlestonmarine.com