E10 Fuel
- Thread starter Dellb
- Start date
Roscobbc
Moderator
Zero effect.......to a point. In an older vehicle it could speed-up degradation of rubber, nylon, fibre and possibly some non-ferrous metals which may (or may not) be a problem at some point anyway. So budget to replace some carb gaskets and seals, and perhaps original rubber fuel hoseing. New replacements will be fine for Ethanol based fuel. Or use Esso Synergy 99
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teamzr1
Supporting vendor
There is an effect using Ethanol in that for about every 1% of eth makes the fuel AFR 1% leaner
so E10 in hot weather can see AFR leaner by 7%
This induces more engine knock so pistons and ring getting banged around and C8 has no controller to really
pull timing to prevent that
That means with an older engine with a carb and wanting good performance having to change the carb jet
or even may have to go with a larger carb
Even with newer Corvettes like C4-C7 is the PCM is trying to bring the fuel trims richer may not be able to get it
right.
Many of the Corvettes I tune the owners have added custom CAMs, heads, etc., have to change fuel injectors for larger
ones to make up for the loss due to E10 so worse with carb only engines, plus less fuel mileage due to E10
Worse here in the USA as the fricking feds approved E15 and most people do not even look at the pumps to see if pump
has E10 or E15
Many of us here with Corvettes and engine mods have to find gas stations that sell non Ethanol gas
Here is an example of a testrun with OBD-II scanner recording engine feed back sensors
Notice how lean the AFR is by the long term fuel trims and the engine knock.
Non Ethanol gas would reduce that from happening
so E10 in hot weather can see AFR leaner by 7%
This induces more engine knock so pistons and ring getting banged around and C8 has no controller to really
pull timing to prevent that
That means with an older engine with a carb and wanting good performance having to change the carb jet
or even may have to go with a larger carb
Even with newer Corvettes like C4-C7 is the PCM is trying to bring the fuel trims richer may not be able to get it
right.
Many of the Corvettes I tune the owners have added custom CAMs, heads, etc., have to change fuel injectors for larger
ones to make up for the loss due to E10 so worse with carb only engines, plus less fuel mileage due to E10
Worse here in the USA as the fricking feds approved E15 and most people do not even look at the pumps to see if pump
has E10 or E15
Many of us here with Corvettes and engine mods have to find gas stations that sell non Ethanol gas
Here is an example of a testrun with OBD-II scanner recording engine feed back sensors
Notice how lean the AFR is by the long term fuel trims and the engine knock.
Non Ethanol gas would reduce that from happening
kentvette
CCCUK Member
I have posted this before, but anyone in any doubt about the damage Ethanol can do to your "classic" Corvette should read the FBHVC info here:
teamzr1
Supporting vendor
Also, since Ethanol attracts water, do not run engine with low fuel levels in gas tank as water is heaver then gas so
it falls to the bottom of tank and builds up, so the fuel pump will pick that up when fuel amount is low
Ethanol being a cleaning agent tends to clean inside of fuel tanks at gas stations and is pumped into vehicle tank
which also falls to bottom of tank
Not sure in your country if they have gas stations like here in the USA where GM made a standard called "Top Tier" gas makeup
that assures more cleaning agents ?
If in doubt in wanting to know what percentage of Ethanol is in your tank is :
will show the amount of Ethanol is in tank.
it falls to the bottom of tank and builds up, so the fuel pump will pick that up when fuel amount is low
Ethanol being a cleaning agent tends to clean inside of fuel tanks at gas stations and is pumped into vehicle tank
which also falls to bottom of tank
Not sure in your country if they have gas stations like here in the USA where GM made a standard called "Top Tier" gas makeup
that assures more cleaning agents ?
If in doubt in wanting to know what percentage of Ethanol is in your tank is :
- Take a clear container that has volume measurements on the side of it
- Add 10% water inside it
- Then add 90% of the gas
- Shake it a bit and let stand for a bit
will show the amount of Ethanol is in tank.
Chuffer
CCCUK Member
Should that be shaken or stirred Mr. Bond ?
