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BANGKOK 19 May 2019 22:01
passiflora

E85 vs E91 or E95

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Hello to all

I just bought a new Toyota Vios 

The motor is compatible E85

The price is very attractive (21.44) but consumes more than 8. 5l/100 km

What do you think, is it better to fill up with this E85 or E95 or E91

Thanks in advance for your advices

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I would use the cheapest fuel...that would be E85..but if not available then use either E91 or E95

definitely don't use diesel !

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1 hour ago, jackdd said:

https://en.wikipedia.org/wiki/Ethanol_fuel

 

 

So if i'm not mistaken the calculation should look like this (85% ethanol, 15% gasoline vs. 10% ethanol and 90% gasoline):

x = y*((85/1.5+15)/(10/1.5+90))

y = price of gasohol

If the E85 price is lower than the x from this equation E85 offers the better energy / cost ratio, if it's higher then Gasohol is better

Currently this site here: http://www.pttplc.com/en/getoilprice.aspx

Shows Gasohol 91 at 28.98 and E85 at 20.84

Using the equation from before: 28.98*((85/1.5+15)/(10/1.5+90)) = 21.485

So with these prices by using E85 you get slightly more energy per baht

Another way to work it out is Ethanol has 60% the energy of gasoline. E10 is 90% gasoline + 10% ethanol , so 96% energy. ( 90% + 0.6 of 10% ). E 85 is 15% gasoline + 85% ethanol , so 66% energy. ( 15% + 0.6 of 85% ). This means E10 has just over 45% more energy , per liter , than E85. So if E 10 is priced at 45% or less than E 85 , it gives better energy per Baht.  The problems with the harvesting , conversion and production of Ethanol , not to mention its total carbon footprint , makes Ethanol a very poor choice for the environment , not to mention the long term problems associated with its use and water absorption.

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E85 is only 85% gas.  Tests show it gets about 26% fewer miles/km  per gallon/litre than regular octane gas.  Additionally, many mechanics cite engine deterioration with ethanol vs. gasoline.  The higher the number E95 the higher the pure gas content. I would skip the E85

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4 hours ago, passiflora said:

What do you think, is it better to fill up with this E85 or E95 or E91

902831961_images(1).jpg.aabdb024cd60628129976b8f8760a60f.jpg

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So much confusion on this thread!

 

There are four ethanol/gasoline blends available in Thailand:

 

E85 = 85% Ethanol, 15% Gasoline

E20 = 20% Ethanol, 80% Gasoline

E10 = 10% Ethanol, 90% Gasoline

Gasoline = 0% Ethanol, 100% Gasoline

 

E85 is cheapest and contains least energy. Gasoline is most expensive and not commonly available. 

 

The ethanol content also effects the RON rating (octane content). For simplification we'll say E20 and E85 are only available in RON95. Most of what is sold is E10 and advertised as 91 or 95. These numbers refer to the octane content (note - not percentages, in other countries 101 and 103 (and others) are available). I'm not sure why they don't phase out 91 completely as the price is virtually the same as 95 and anything that can run on 91 can run on 95 (with vice-versa not true, my '04 Ford Laser only runs on 95).

 

Diesel will be in the news shortly with them increasing the biofuel content from B7 to B10 - 7% to 10%.

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Posted (edited)
5 hours ago, naboo said:

my '04 Ford Laser only runs on 95

I had one of them too.

 

 

 

4DSCF0016.JPG

Edited by johng
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Naboo.Your list is correct , but my explanation was of the energy contained in a liter of fuel , of the different types. E 20 is a compromise for SOME cars , of later years , but still  has less energy than E10. Hence the higher consumption , and reduced power mentioned by hkt83100 .The bio-fuel diesel is a big problem , waiting to hit the fan. If you think of the planned increase of Bio "fuel" as the Ethanol of diesel , you can see the problems that is going to cause.  All thanks to all the misinformation from the sandal wearing tree-huggers.

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On 4/18/2019 at 6:47 PM, Thomas J said:

E85 is only 85% gas.  Tests show it gets about 26% fewer miles/km  per gallon/litre than regular octane gas.  Additionally, many mechanics cite engine deterioration with ethanol vs. gasoline.  The higher the number E95 the higher the pure gas content. I would skip the E85

E85 is only 15% gasoline and 85% ethanol(hence, the "E"). The higher the number, the less gas. The 91 and 95 refer to the octane ratings and not the ethanol content. Both are 10% ethanol. 

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8,5L/100Km for a Vios? I drive a Civic 2016 (1800cc) and am using E85 only. Absolutely no problem with the performance. Drove recently from southern parts of Songkhla Province to BKK and back: 6,5L/100Km (ok, that's with only a small percentage of city traffic). I like and prefer E85, as well from the economical as from the ecological point of view.

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