High Octane

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Dr_Shemp

Well-Known Forum User
I'm sure that, like me, many of you search out those petrol stations that sell the higher octane fuel. Where I live (West Sussex) the highest I can buy is 97. I don't know if this is the highest available but, whilst in the motor factors I noticed a little bottle on the shelf called "nitrox octane boost" costs £4.99 and should be added to a full tank of fuel, cant remember the octane rating it claimed to produce but it seemed quite impressive so i had a bottle, after which I felt quite euphoric and decided to treat the car to one. It didn't give me blistering performance off the lights but it did seem to improve things a little, can anyone shed anymore light on this subject and are those little bottles worth the exta fiver in the tank? and the poundig headache?
 
Hi,
The best fuel to go for if you can get it, is Shell Optimax, which has a minimum 98 octane rating, some others such as Esso super unleaded are 97.
If your car is a non-turbo, then normal unleaded 95 will be ok!
Although Optimax costs more than 95 unleaded, you tend to get more mpg and a better running engine from the additives in it.My Z31 Turbo prefers it!
In normal driving you shouldn't need an 'octane booster' even though your car would originally have run on 97 leaded.
Best to avoid supermarket fuel, although our local Sainsbury's sells super-unleaded, which I do use occasionally.
Cheerz,
JEZ
 
Hi

I use shell optimax and i also find that my car runs better whether that is because i want to believe its runs better or not im not sure but the car does'nt feel as responsive with just standard 97 octane as for the additives i have heard whether true or not that some that claim to clean your engine can cause running problems
 
I'm curious as well, as I'd have thought it all comes from the same supplier in the same grade?
 
I generally use Optimax or Shell Super, but she does seem to like four star with a dose of the nitrox in it.

TL
 
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