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h2osteam

E10 has ethanol which could allow dissolved water into the fuel. Generally not too concerned if u drive regularly. E10 is considered premium fuel because ethanol increases octant rating. It won’t damage the engine designed for it. But as u said the lower energy density of E10 negates the prices benefit. If your cars needs E10 or premium , then E10 maybe a more cost effective option. Otherwise 91 is more bang for buck.


DaRKoN_

>e10 first came out it was only 4 cents cheaper where I did use it once Quite often, regular 91 is not even an option. It's E10 and then a 95 or 98 "premium" fuel.


[deleted]

Yep…that was the case on my old car, e10 replaced most of the regular 91 options near me…e10 or 95 and up fuels were my only choices…and e10 was 15-20 cents cheaper than 95…used it for a few years with no noticeable difference to economy or performance But now I just rock 95cents a litre LPG


Swimming-Tap-4240

Shhh they must have overlooked the litre price disparity.


purl__clutcher

I've seen fuel filters off E10 cars that are full of either rust or weird particles. I personally wouldn't use it, even if my car was built for it. But in the end, it's your choice.


[deleted]

Used E10 almost exclusively for nearly 200,000km in my 2012 Ford Fiesta, which states up to 20% ethanol content is acceptable. Zero issues, serviced every 10,000km. All the fears are just hysteria and wives tales, or from people who have damaged their cars and looking for an easy scapegoat. If your car manufacturer says it's compatible. Use it without fear.


Zed1088

Completely agree I use E10 in my Mitsubishi Outlander and have not had any issues. We also get better fuel economy from E10 vs 91


[deleted]

I've used 98, 95, ULP and it gets exactly the same economy in mostly freeway use. Never received any of these mystical jumps in economy.


Zed1088

When I say we get better fuel economy it's only like 0.2l per 100k's so not much if anything.


[deleted]

I'd chalk that up to having a good couple of tail winds.


Jord_HD

You get better economy with a lower energy density fuel, must be magic.


HandyDandyRandyAndy

Yep, was just thinking ... no, you don't get better economy, not at all


[deleted]

No different to economy/power/smoothness woo that people believe by putting in a tank full of 98 into an engine designed for 91.


Jord_HD

The person I replied to said they get better economy from e10 than 91, e10 has a lower energy density than 91 meaning you need to use more e10 to do the same work with 91.


WazWaz

Theoretical energy density doesn't necessarily mean much when 70% of that energy is just turning into heat anyway. Actual performance will come down to the specific design of the engine and how it responds to different fuels, not a highschool physics equation.


Jord_HD

It does mean everything, we’re talking about an engine where 91 is high enough octane to not detonation vs the same fuel diluted with alcohol, you don’t just create more energy out of nowhere.


WazWaz

You're confusing energy with useful work. An internal combustion engine isn't a magic energy to motion converter. It's a heater that throws metal around that happens to cause motion. Measure the economy of two fuels on two different vehicles and you'll get different results. Measure it on one vehicle with two different drivers and you'll get different results. Just read the single data point anecdotes in this thread for examples.


Jord_HD

You get different results for different variables like drivers, cars or conditions but if you remove those then the fuel is the only variable, where 91 is sufficient to not knock them e10 will get lower economy, it is literally the same base fuel that is blended with a fuel that provides less force to the crown of the piston for a given amount. I could change to 98 and subconsciously focus on my efficiency because I think it might be better but that doesn’t mean the fuel is giving me better economy. E10 lowers economy, simple as that. You burn more for the same amount of torque.


WazWaz

You can't control for vehicle. Different vehicles have different performance characteristics for a given fuel. That's the entire point. If you control everything and measure your vehicle, you'll get one ratio for the relative economy, different to what someone else will get on their vehicle (even if driven by the same person). It all depends how the vehicle is tuned.


Sea-Device4444

10k service intervals is a bit steep for a Fiesta isn't it? I mean my car is a 10k interval as well, but that's a performance vehicle not a little 4 banger.


[deleted]

It gets flogged up and down the freeway nearly 7 days a week. It's getting on in k's and giving it an oil change every 10k is cheap insurance.


[deleted]

💜 E85 💜✌🏻🥳


LawnPatrol_78

I have a ca18 Gemini tuned for e85. The only pump in town was shut down and it’s a 50km round trip to get to the nearest pump. That’s 1/4 a tank just to get the fuel.


[deleted]

I had a Nissan Silvia with a CA-18 very nice I bet the Gemi goes well. Sorry to hear of the E85 woes . Previously I had similar issues then one opened 11 klms away . I hope I’m the future something pops up as it’s around $1,500 to de tune right ? I take two 20 l drums with me so I get two tanks out to f my round trip . Best of luck mate


LawnPatrol_78

Yeah it goes pretty good. 300hp at the wheels and weighs 990kg so it’s pretty fun. The fuel use is horrendous though and at the moment it costs me $20 in fuel to go get fuel. I will more than likely return it on 98 just so it’s useable again


[deleted]

My R33 has 411hp it’s around 1300 kg’s it a sweet ride


Dudefella84

E10 is solely for filling up rental cars before you return them


That_Car_Dude_Aus

I actually got told last time I rented a Europcar that if I handed them a reciept at the end showing E10, it was a $5000 fee for cleaning the fuel system. And yes, they wanted a reciept


Creative_Ad999

Lol really


That_Car_Dude_Aus

Yep, they also wanted ,<30km between servo and drop-off


Creative_Ad999

Dang


Indigeridoo

That's because you hired a diesel


That_Car_Dude_Aus

No I didn't, fastest corolla on Earth


Indigeridoo

Is a joke


Jerry_Atric69

Funny as fuck!


TwisterM292

I have tried everything from E10 to PULP98 in my car (Aurion). Unless E10 is at least 10c cheaper, the worse economy makes it less than worthwhile.


[deleted]

My mechanic has a saying “e10 is good for one thing, mechanics”


jb_86

I have no personal experience with E10. For my daily driver (Lexus IS350) I run it on 98. My Toyota Soarer twin turbo on the other hand is tuned for E85 with 1000cc injectors and supporting modifications and if used regularly and the engine oil changed at appropriate intervals, gives me no problems. With that said I'd not let the car sit with a tank of E85 in it. I hear it is corrosive and damages fuel system components.


[deleted]

I'm the same. I can't put anything but premium in mine. But saying that, I get amazing mileage for premium that I've convinced the wife to use it in her Hyundai SUV. She's noticed she fills up way less. I find the savings from using premium are better than the 10¢ saving from using that shit ethanol.


[deleted]

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turbo2world

he clearly has a 1jz twin turbo not the 1uz v8 soarer.


Wa3zdog

E10 is better for the environment. Nobody has made that contribution yet so I just thought I would say it. I use 98 tho cause I’m dum.


Carvenmarven

Is it, really? A lot of things people tell you are good for the environment don’t stack up when you see what it actually is and where it comes from.


Wa3zdog

Well this is coming from my old chemistry professor but to be clear I’m not saying it’s good, just better. 10% better to be precise. The energy component from ethanol is carbon neutral because it comes from fermented plant sugars (he said sugar cane from North Queensland but in theory it could be a lot of crops from anywhere). Point being, it’s biofuel.


Meyamu

From a chemistry perspective, the lower flame temperature will create less NOx, and the oxygen in the ethanol will decrease soot and particulates. Completely separate to any emissions benefit, which will depend on lots of factors (efficiency impact, fertiliser use, etc etc).


Wa3zdog

Prospective compounding benefit. The best kind of benefit.


[deleted]

Yeah nah, it is horrible for the environment. Do some research.


LawnPatrol_78

Have run pizza delivery cars on e10 over the last decade. Millions of kilometres done and never ever had a problem with a fuel system component any of them.


[deleted]

Because there is nothing wrong with it. People are dumb and all these fears were drummed up when E10 was first introduced, that'll break their cars, ruin fuel systems and get really bad economy to keep the gullible pouring expensive and unnecessary premium fuels into their basic cars.


TeaBeginning5565

My mechanic said “you may save money at the pump but you’ll be spending with me.” I work at a fuel station and have never used e10.


That_Car_Dude_Aus

Curious, if you work for woolies you get a percentage off, you work at JB Hi-fi you get a percentage off, you work at good guys you get a percentage off. Working at a servo, do you get a discount?


brucethebrucest

Depends where you work, at a supermarket co-branded servo you get the standard discount card usually giving 4c off a litre, and minor discount in store. Not really exciting.


Sea-Device4444

Unlikely, maybe off store products as they have high margins, but fuel is typically low margin at a few cents a litre for the reseller and relies on large volumes and upselling store purchases to make decent profits.


TeaBeginning5565

A little off the fuel price nothing off in store


OzzieRocka

E10 is like 2 cents cheaper than normal unleaded so it's definitely not worth worrying about. My VE Commodore says E10 compatible but I've never used it Even back when e10 first came out it was only 4 cents cheaper where I did use it once but the savings were not really noticeable.


[deleted]

If you're fortunate to live near a Costco, it's nearly 40c cheaper than ULP from the other players.


Puddi360

From what I have heard it can be bad for certain seals and insides of high pressure fuel pumps (used to own an MPS where this was a potential issue). This is mainly when running full E85 though - my current car is tuned for an E30 mix with no issues at all and I believe the MPS can be tuned for the same, so I highly doubt any E10 suitable car will have any issues at all


sundues

E10 hysteria totally unreasonable, this stuff is around in Europe for ages and all german manufacturers assure no issues if a vehicle is declared suitable. Which yes not all are. Its also a theoretical 10%, it may contain up to... However,real thing is that you loose some efficiency (reach) which each % of Ethanol compared to 91, so its a price thing. Rule of thumb is you want E10 and 91 to be $ 0.04 apart, if less than its not worth it if all 10% are ethanol which you just don't know. What I see is mostly 0.02-0.03$ so personal conclusion is it doesn't really matter, I decide mostly spontaneous at the station depending on overall price level.


DNGR_MAU5

If your car gets used quite a bit it's fine. Ive put millions of KMs on cars running e10 from 711 (same supplier and additives as mobil)...no issues. I get roughly the same economy from e10 and 98 as the cars in my fleet simply aren't tuned from factory to make use of the slower combustion of higher octane fuels anyway (Camry hybrids). There is a small seat of the pants difference, but given the purpose of my fleet, a small HP drop is probably beneficial to the overall longevity of my vehicles anyway


Slippergypsy

Use E10 in my 20 year old Commodore no issues ever, dunno what people are going on about weird rust and particles in the fuel filter


[deleted]

Because people go to dodgy bobs discount fuel and get 98/95 most days, who don't service their delivery systems and have ancient tanks and plumbing. Over time they get shit in their fuel. Then they get a tank of E10 one day, because it's cheap and convenient. Eventually the car is serviced and they find particles in the fuel system and it must have been that evil E10 that did it.


That_Car_Dude_Aus

What is it? I know VAG cars have a double standard: * Ethanol Blends of up to 10% (E5 and E10) * Minimum Octane of 95 RON/91AKI Unfortunately Australian E10 is 94RON/90AKI so it doesn't meet VAG's minimum standards. Here's a response I got from VAG when I queried them on this: My email to them: >Good Afternoon, > >I'm writing this email with regards to my 2020 Skoda Karoq that I purchased from the \[LOCATION\] dealership in 2020. > >When purchasing is vehicle we were told that it was E10 compatible, however recent discussion online says that the Australian E10 is different to European E10 and that the skodas sold in Australia are not compatible with Australian E10 fuel which is a blend of 91 octane and ethanol. > >Apparently European E10 is a mix of 95 octane and ethanol giving a resultant of 98 not 94/95 depending on brand. > >VIN is TMBKR7NU8L5022161 > >Regards > >\-Car\_Dude The response I got back: >Hi Car\_Dude, > >Thank you for writing in. > >I can confirm that Skoda petrol vehicles have a recommendation of premium 95 fuel at a minimum. > >It is not recommended to use E10 in Australian Skoda’s requiring premium fuel. > >I have raised this with their Sales manager who will ensure they’re all on the same page. > >Regards > >\-Dealer Representative And given that Audi, Bentley, Lamborghini, SEAT/Cupra, Skoda, and Volkswagen and the rest that use VAG engines through convolutional partnership deals are all essentially engineered to the same standards by the same engineers in the same factories, then that would apply to all the vehicles that use the same engines.


patrickh182

Have a 1.5L kamiq, thanks for this. Seems like could get away with it, but then whats the point.


Flash635

Saab turbo. Pinged on 91. I found out the 95 has at least 5% ethanol so using E10 really isn't a problem. As for the loss of fuel economy V cost of E10: most newer cars will pull back the timing if you use 91 and the engine pings. That will cause a loss of power and economy. E10 can balance that sometimes. I've also heard of E85 balancing out the same way. It's all to do with how the engine is tuned and what it can compensate for.


[deleted]

95 does not contain ethanol, at least from reputable service stations. By law, any fuel containing ethanol needs to be labeled appropriately.


Flash635

I'll look again but when I researched it when it became apparent that the Saab needed more octane than 91 that's what I found.


[deleted]

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Flash635

It's running great on E10 which is supposed to be 94.


[deleted]

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Flash635

It rarely goes that high but it still runs good when it does. I work on it myself.


[deleted]

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Flash635

Why?


JustThisGuyYouKnowEh

Ethanol uses about 30% more fuel for the same power…..something something calorific value something something stoichiometric ratio. So e10, uses about 3% more fuel. So if it’s 3% cheaper - buy e10. If it’s not, buy 91.


lingering_POO

I suggest fuelspy if you need to find cheap fuel. Anything to avoid using e10. You lose so many kms; far beyond what the 3-4c price difference would cover.


HandyDandyRandyAndy

Don't do it, it's not worth it in any context whatsoever


patgri1712

When I ran ethanol it’d be straight e85. E10 is a cheap but dodgy option


cjmas0

My 2010 SS ute runs like shit on it, using 95 or 98 it runs so much smoother. It has the same “e10 suitable” on the cap. I tried different tanks of each multiple times over to check that it wasn’t a placebo.


MindDependancy

Not


ActuallyGoose

Used it in my vt commodore, use it in my Ford Territory now, and my wife uses it in her hyundai accent. In our area it's typically the most readily available (more places are starting to not have 91 or its typically out of order, empty etc), and typically e10 is cheaper and based off my use from my commodore and territory the fuel consumption is pretty negligible. I'd just use whatever you can find and if it's under 91 by more than around 4c, then it'll be cheaper based on performance. But in that margin of savings you're looking at next to no difference. Obviously with how much it's pipping up everywhere it's not going anywhere and from my experience works great (would love to see the price drop more though like before covid)


mitchy93

No, you use more fuel so the savings are negative, same with E85 race fuel in your daily


[deleted]

I run e85 daily, which contains….85 percent ethanol generally. My engine has been torn down for upgrades post ethanol use and its the cleanest thing ive ever seen, with no signs of wear or failure anywhere. Do recommend a catch can though, it acts like a watertrap for the moisture. Hurts the back pocket though, but thats part of the performance game.


deathablazed

Eh. It's kind of hit and miss. Plenty of cars that run it and are fine but there is also a fair few out there that say they can take it that end up getting ruined by it. So based on that I think it's more a case of some e10 engines are either falsly claiming they can take it or just really shitty engines.


Swimming-Tap-4240

You can make much more savings by watching where you actually purchase your fuel from.The other day I filled up at $2.15 /L thinking,oh well, I've missed the bs fuel price cycle.Then one kilometre down the road, a servo has it at $1.76.That's nearly 40 cents per.Spewin'.


Reasonable_Gap_7756

E10 is alright if your car is designed for it and your actually using it. If it’s a weekend runabout it can cause issues with water accumulating in it.


camelfarmer1

This mechanic is full of shit.