Question for those have flex fuel kit installed - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

stlgrym3 · 09-02-2018, 05:16 PM

Are you switching fuels from tank to tank or stick with with either petro or E85 most of time? I was told it’s not good for our gas tank if we fill up with E85 all the time since it was not designed for it, any truth to this?

Lantanafrs2 · 09-02-2018, 05:21 PM

I've never heard that. I've been using e85 only for a while now. It's all theory....til it isnt

Yoshoobaroo · 09-02-2018, 05:30 PM

Absolute bullshit. Any modern car (last 10 years especially so) has a fuel system to handle E15 fuel for the life of the car. That means it's fine with pretty much any concentration of ethanol.

stlgrym3 · 09-02-2018, 05:32 PM

So is it better for the car to stick with one fuel until you have the need for the other?

Yoshoobaroo · 09-02-2018, 05:37 PM

Quote:

Originally Posted by stlgrym3

So is it better for the car to stick with one fuel until you have the need for the other?

No, it really doesn't matter with a flexfuel sensor.

Breadman · 09-02-2018, 06:19 PM

Quote:

Originally Posted by stlgrym3

So is it better for the car to stick with one fuel until you have the need for the other?

yes stick with e85 because it smells better and you can sniff the nozel when done

sid94 · 09-03-2018, 12:28 AM

I rode 4 years on straight e85 and now I’ve been on 93 for a year and now I’m switching back to e85 lmao it doesn’t mater like stated before now a days the cats can handle it not like back in the olden days

Sent from my iPhone using Tapatalk

CSG Mike · 09-03-2018, 06:24 AM

The fuel switch is to help keep your valves clean. Ethanol does not have the detergents that pump gas has.

tomm.brz · 09-03-2018, 06:41 AM

? everybody always say that ethanol as a solvent cleans better the engine than petrol, you are now saying the opposite...

Yoshoobaroo · 09-03-2018, 09:16 AM

Quote:

Originally Posted by tomm.brz

? everybody always say that ethanol as a solvent cleans better the engine than petrol, you are now saying the opposite...

It depends where you get your gas. Ethanol itself works better as a solvent than gasoline, but top tier gasoline brands (Shell, Mobil, etc.) put extra detergents in the gasoline so it cleans better.

stlgrym3 · 09-03-2018, 09:18 AM

Quote:

Originally Posted by CSG Mike

The fuel switch is to help keep your valves clean. Ethanol does not have the detergents that pump gas has.

so you're suggesting use pump gas (such as daily driving) until i need the extra power?

Breadman · 09-03-2018, 09:40 AM

Quote:

Originally Posted by Yoshoobaroo

It depends where you get your gas. Ethanol itself works better as a solvent than gasoline, but top tier gasoline brands (Shell, Mobil, etc.) put extra detergents in the gasoline so it cleans better.

citation needed, there is a federal requirement for what needs to go in

Trueweltall · 09-03-2018, 12:58 PM

Quote:

Originally Posted by Yoshoobaroo

It depends where you get your gas. Ethanol itself works better as a solvent than gasoline, but top tier gasoline brands (Shell, Mobil, etc.) put extra detergents in the gasoline so it cleans better.

Top tier gas brands have been putting above the minimum needed since 1995, it's just a marketing tool now. The "extra" doesn't do anything except to convince you to get their brand.

CSG Mike · 09-03-2018, 10:18 PM

Quote:

Originally Posted by stlgrym3

so you're suggesting use pump gas (such as daily driving) until i need the extra power?

I recommend you just run a tank of 91 here and there. I run 91 through my brz every 3-5 tanks or so, typically on my way back from the track (because there is no ethanol by the tracks and I only take as much as I need to run the day).

09-02-2018, 05:16 PM	#1
stlgrym3 Senior Member Join Date: Nov 2011 Drives: 2017 Subaru BRZ Limited Location: socal Posts: 562 Thanks: 72 Thanked 51 Times in 44 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Question for those have flex fuel kit installed Are you switching fuels from tank to tank or stick with with either petro or E85 most of time? I was told it’s not good for our gas tank if we fill up with E85 all the time since it was not designed for it, any truth to this?

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09-02-2018, 05:21 PM	#2
Lantanafrs2 Senior Member Join Date: Jan 2018 Drives: 2013 frs red Location: South Florida Posts: 3,570 Thanks: 2,579 Thanked 3,132 Times in 1,684 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	I've never heard that. I've been using e85 only for a while now. It's all theory....til it isnt

09-02-2018, 05:32 PM	#4
stlgrym3 Senior Member Join Date: Nov 2011 Drives: 2017 Subaru BRZ Limited Location: socal Posts: 562 Thanks: 72 Thanked 51 Times in 44 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	So is it better for the car to stick with one fuel until you have the need for the other?

09-03-2018, 12:28 AM	#7
sid94 Senior Member Join Date: Jan 2014 Drives: 2013 frs Location: Miami fl Posts: 206 Thanks: 38 Thanked 49 Times in 38 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I rode 4 years on straight e85 and now I’ve been on 93 for a year and now I’m switching back to e85 lmao it doesn’t mater like stated before now a days the cats can handle it not like back in the olden days Sent from my iPhone using Tapatalk

09-03-2018, 06:24 AM	#8
CSG Mike Join Date: Jul 2012 Drives: S2000 CR Location: Orange County Posts: 14,562 Thanks: 8,942 Thanked 14,211 Times in 6,854 Posts Mentioned: 970 Post(s) Tagged: 14 Thread(s)	The fuel switch is to help keep your valves clean. Ethanol does not have the detergents that pump gas has.

09-03-2018, 06:41 AM	#9
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,279 Thanks: 515 Thanked 1,121 Times in 811 Posts Mentioned: 70 Post(s) Tagged: 0 Thread(s)	? everybody always say that ethanol as a solvent cleans better the engine than petrol, you are now saying the opposite...

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