How much is too much?

[colm_mcm]

Was in Halfords today, doing the weekly shop.

Bought some fuel system cleaner and octane booster.

I've added the cleaner already, and plan on throwing the octane booster in on top of the 1/4 tank of petrol that'll be left next weekend for the drag in Limerick.


Question is:

Is it ok to use a bottle of booster that's intended for 60L of petrol, with say 15l of petrol,

Does this stuff even work?

[miss-enzo]

Lee asked this question alot regarding the RX as she's not mapped for irish fuel and the majority of people said it prob does very little.

One guy in particular from offaly (big rx head) said that it might boost the octane by a few ron but its not gonna make a huge difference.... also the amount u use wont make a difference either..... if u use the recommended amount per tank it will do he same as adding the whole bottle as it reached a certain saturation level and wont do any more after that.

Lee still puts it in the RX at every fill up just to be on the safe side as the previous owner did the same.

but to be honest i wouldnt say it wil make much difference at all! esp since the car ur can is running irish petrol all the time now!

i could be very wrong now thats just what ive heard from people as it is a frequently asked question!!!

[colm_mcm]

It's on a strict diet of Maxol E5 for the past few months, the only exception being the trip to Kerry last month.

interesting about the saturation level thing. no idea how that works

[Myfeckin FTO]

Was in Halfords today..........Is it ok to use a bottle of booster that's intended for 60L of petrol, with say 15l of petrol,

Does this stuff even work?

Really depends on what type of octane booster you are using. Personally I would only use Millers or Silkolene Proboost.

Having said that if you are using 99.2 RON E5 there may not be much more to gain on the GPX from another 2-3 RON (according to the Millers and Silkolene burp). You mentioned you bought the Octane booster in Halfrauds - The only Octane boosters I've seen in there only add a couple of points of RON and aren't worth the effort.

Not much point in overfueling either - you will need to be careful not to alter the calorific values of the petrol while trying to up the RON.

FWIW - I'll be running E5 + Silkolene Proboost. A litre of proboost to 33 litres petrol will up the RON by 3%. I'll add a litre of proboost to 25litres of petrol just to ensure RON without majorly sacrificing the other properties of the petrol.

You could also try mixing a 5% mix of E85 (114RON AFAIK) to E5 petrol - that may have an even greater effect within the safe limits of ethanol content of the petrol.

All the above is just my personal opinion - I'm not a chemical engineer or anything like that and don't have any indepth knowledge of the makeup of fuel. What I will say is make sure you buy your petrol in a busy service station - if the fuel has been sitting in tanks for weeks/months its bound to loose its quality/RON values.