what gas is better

Asked by Jan 16, 2015 at 06:37 AM about the 2013 Ford Focus SE Hatchback

Question type: General

does it hurt the car to put regular unleaded 87 octane in a car that is flex fluid or can you
use both.  some one says less mileage with flex fluid, But the  per

11 Answers

36,495

No problem.

4 of 4 people found this helpful.
107,745

Correct. That is why it is called flex fuel. You will get better fuel mileage as the methanol decreases in the fuel, but it looks like we are stuck with a 10 percent mix minimum in today's fuel. My neighbors rig is a flex fuel, and during a trip he tried E85 for 1 tank and said never again, his mileage dropped horribly and the power was nonexistent.

4 of 4 people found this helpful.
11,355

If your vehicle is rated for E85 you can use it, but you are better off switching when the tank is almost empty. You will lose 15-20% fuel economy, so if the E85 isn't that much cheaper then stick with regular gasoline. If your car is not rated for E85 then putting it in will turn on a bunch of emissions and warning lights.

5 of 5 people found this helpful.
10

I having problem with the gas mileage

1 of 1 people found this helpful.

what is E15 gas

107,745

first it was E10 now they want to stuff E15 down our throats, bad enough we lost mileage with E10 now they want to do it again with E15, more fuel pump failures, engine damage, and horrible fumes from the exhaust. Will it ever end?

1 of 1 people found this helpful.
20

im not in this but im going to get a ford truck and i want to know what gas to use.

2 of 2 people found this helpful.
107,745

Stick with E10 unless you can get real gasoline.

Can I put supreme gas in my 2006 ford fusion

92,425

E15 should not be used in any car except Flex Fuel cars. I don't know that any new cars are rated to use with E15. The EPA says you can use it for 2001 and up cars but they don't give a darn about your engine.

1 of 1 people found this helpful.
107,745

Yes, but the compression isn't high enough for you too notice any performance increases, but you may get a slight benefit in MPG.

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