2008-2013 Cadillac CTS Performance Mods Discussion, E85 in Cadillac CTS Second Generation Forum - 2008-2013; Anyone know the ratio of E85 and gas for the DI engine without needing a tune?...
- 12-17-12 12:26 PM #1
Anyone know the ratio of E85 and gas for the DI engine without needing a tune?
- 12-19-12 01:36 PM #2
My 2012 is shown as being flex fuel ready which to me means I could use full E85 without any problem.
- 12-20-12 02:59 PM #3
Anything in your '08 manual?
I don't see anything good coming with E85. Nothing except money going to Brazil. What a waste of food. If we could process wasted vegetation, then that may make it a different story.
- 01-08-13 02:22 PM #4
It isn't wise to mix ANY percent of it. The stoic ratio of the fuel changes dramatically and would be WAY to lean at wide open. The calibration is not setup to detect percentages of alcohol and is set to be safe only to about 10%13% ethanol blend. Which is what you get out of the pump already.
Octane rating does go up but fuel requirements from the % go up as well, so less gas mileage.
- 01-09-13 02:07 PM #5Cadillac Owners Connoisseur
- Automobile(s): 09 CTS4 DI Black Raven/Ebony
- Join Date
- Jun 2012
- Pittsburgh, PA
Not to mention the damage that can be done by the higher alcohol % in the fuel. Not everything in the fuel system is tolerant of the higher amount of alcohol. This is why we want to stop the E15 (15% alcohol) that the fed is pressing for. Nothing but bad going higher than what you currently get out of the pump.
- 01-09-13 10:21 PM #6
- 01-16-13 06:09 AM #7Cadillac Owners Member
- Automobile(s): 2012 CTS coupe
- Join Date
- Aug 2012
The 2012 CTS Performance edition will NOT run e85. You will get 10 MPG and your Check engine light will come on if it does not blow up first. You must have a yellow gas cap to run e85. Read your manual before even thinking about it.
- 01-21-13 02:37 PM #8Cadillac Owners Fanatic
- Automobile(s): NONE
- Join Date
- Feb 2012
We can adjust your tune for E85- we've got a few 2012 Camaro 3.6 owners running it. All fuel systems that are in the newer GM cars are E85 capable but the engines are not without a different calibration, which is why it doesn't come flex-fuel ready.
- 01-21-13 04:39 PM #9Originally Posted by BNRacing