Fuel Preferences...G91, G95, E20, E85

[OMGImInPattaya]

I have recently bought a car that can take any of these fuels, as well as plain benzine. In general, considering the kilos per litre and price matrix, what the preferred fuel for a typical engine?

[juehoe]

G95 or E20 for my Mazda CX-3. E85 is far more cheaper per litre but the fuel consumption is also significantly higher. The ecological footprint of E85 is also not very good.

The fuel consumption with E20 is only slightly higher than with G95 and so the cheapest variant per kilometre. But I prefer G95 because of the lowest ethanol content.

[Kwasaki]

 

3 hours ago, OMGImInPattaya said:

preferred fuel for a typical engine?

The cheapest one it can take obviously.  

[juehoe]

 
The cheapest one it can take obviously.  

Cheapest means lowest cost per kilometre are relevant, not cost per litre.

Personally, I also look at the ecological issues.

[CutiePi]

9 hours ago, Kwasaki said:

 

The cheapest one it can take obviously.  

Unfortunately it's not so simple because the energy density varies among these fuels, i.e., the kilos per litre is not the same.

[Kwasaki]

8 hours ago, juehoe said:

Cheapest means lowest cost per kilometre are relevant, not cost per litre.
Personally, I also look at the ecological issues.

 

l'd use the cheapest and let the car technology take care of ecological issues. 

[Kwasaki]

49 minutes ago, CutiePi said:

Unfortunately it's not so simple because the energy density varies among these fuels, i.e., the kilos per litre is not the same.

From my experience using my Mrs Yaris which can use up to E20 the difference in kilos still makes a saving although l concede not great but a saving neither the less.  

 

If engine spec is designed to take a fuel which is cheaper use it if garages locally stock it. 

[GARYZX6R]

10 hours ago, juehoe said:

 

Personally, I also look at the ecological issues.

 

Haha and you drive a car .

[cooked]

The recommended fuel is generally printed where you remove the fuel cap!

I was told to only use 91, the manual states that I can use a few more and inside the fuel cap is written E20, which is what I use as I noticed a slight improvement in acceleration from stand still.

I  also tried to calculate the mileage with different fuels and the difference hardly seemed significant.

[juehoe]

Haha and you drive a car .

Yes - I (have to) drive a car, because unfortunately there are no other opportunities. But I try to do it as ecological as possible (in Thailand).

Ethanol productions has two sides. Thailand has enough food and it gives the farmers additional income. But the production of ethanol consumes a lot of water and the carbon footprint is negative. Only using waste makes sense for ethanol production.

[Kwasaki]

20 minutes ago, juehoe said:

Yes - I (have to) drive a car, because unfortunately there are no other opportunities. But I try to do it as ecological as possible (in Thailand).

Ethanol productions has two sides. Thailand has enough food and it gives the farmers additional income. But the production of ethanol consumes a lot of water and the carbon footprint is negative. Only using waste makes sense for ethanol production.

 

Maybe you'd be interested on a mechanical engineers take.

https://www.wired.com/2011/06/five-ethanol-myths-busted-2/