SUL v UL and Octane Boost
19 February 2001, 11:23 AM
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Just doing some maths. I have a UK spec impreza normally running 95ron - but have noticed the performance benefits of SUL
If SUL is 5p/litre dearer than UL, that works out at £3 / 60 litres dearer. Octane Boost works out at approx £2.50 a tank?
I understand that octane boost adds 2 da do rons to the fuel - making UL 97 (aka SUL)
So whats better for the engine or performance? I know that ill get better performance from SUL + Octane - but im saving £.50 a tankfull by using UL + Octane boost!!!
Any recommendations?
James
If SUL is 5p/litre dearer than UL, that works out at £3 / 60 litres dearer. Octane Boost works out at approx £2.50 a tank?
I understand that octane boost adds 2 da do rons to the fuel - making UL 97 (aka SUL)
So whats better for the engine or performance? I know that ill get better performance from SUL + Octane - but im saving £.50 a tankfull by using UL + Octane boost!!!
Any recommendations?
James
19 February 2001, 03:22 PM
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When you buy SUL, you know you're getting 97ron. With octane booster, the gains can vary. I can see absolutely no point using it with NUL, it just doesn't make sense (unless you can't get SUL that is).
And as you get better mpg with SUL anyway, and this alone negates the price difference.
Stef.
And as you get better mpg with SUL anyway, and this alone negates the price difference.
Stef.
20 February 2001, 06:44 PM
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has anyone got real proof that you get more mpg running on SUL?
At my local garage (Esso) it is 10p per litre more expensive than NUL so it would have to be quite a hike in mpg to make it worthwile on cost grounds.
At my local garage (Esso) it is 10p per litre more expensive than NUL so it would have to be quite a hike in mpg to make it worthwile on cost grounds.
21 February 2001, 04:23 PM
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10p per litre more????????????? 
It's only 5-6p a litre more near me, also Esso. That equates to about 25p a gallon more which is about £2.75 per fill-up. This equates to approx 2/3 of a gallon, and I get at least 20 miles more to a tank with SUL, which is what my car does mpg wise. Not conclusive proof perhaps, but add that to the smoother running, increased power and larger safety margin and it's good enough for me.
Stef.
It's only 5-6p a litre more near me, also Esso. That equates to about 25p a gallon more which is about £2.75 per fill-up. This equates to approx 2/3 of a gallon, and I get at least 20 miles more to a tank with SUL, which is what my car does mpg wise. Not conclusive proof perhaps, but add that to the smoother running, increased power and larger safety margin and it's good enough for me.
Stef.
22 February 2001, 02:17 PM
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James, Millers only treats 50L, so if SUL is 5p a litre more then NUL plus Octane booster costs the same as Super on it's own for the same 50 litres. I'd only use NUL + booster if I couldn't get SUL, otherwise as I'd go for SUL every time.
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22 February 2001, 07:11 PM
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All my Local Esso's have NUL for 74.9p per litre and SUL for 86.9p per litre. I bought a box of 10 Millers Octane Booster for £22.95
So 50L of NUL costs £37.45 + £2-95 (booster)
and 50 L of SUL costs £43.45
I have tried the Octane Booster with both and sure with SUL it flies but it is still OK with NUL at least as good as SUL on its own. Also NUL is comong down another 2p per Litre from 1st March making an even bigger price difference as SUL is not getting the same reduction.
Pays your Money Takes your choice !!
So 50L of NUL costs £37.45 + £2-95 (booster)
and 50 L of SUL costs £43.45
I have tried the Octane Booster with both and sure with SUL it flies but it is still OK with NUL at least as good as SUL on its own. Also NUL is comong down another 2p per Litre from 1st March making an even bigger price difference as SUL is not getting the same reduction.
Pays your Money Takes your choice !!
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