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'2s have to have higher octane fuel, how much difference is it likely to make to my NA Rev5? Currently I use bog standard Esso fuel (admittedly primarily due to proximity and the Tesco Clubcard points...), but if there were a noticeable difference I wouldn't mind paying the extra few pence per litre for Shell Ultra Supermax or whatever it's called...TheLepresean wrote:Whilst I know import
the reason the turbos use the higher octane is to prevent detonation, not something your likely to suffer in a NA car 
(before they both became ridiculous crash fests) looking into the effects - using cheap fuel on a range of cars, dynoing them, then using fancy fuel and dynoing them again; and I'm sure, whilst the more boring cars it made no difference to, the sportier faster cars (an Impreza among them, IIRC) saw gain of a fair few bhp? IIRC it saw a gain of about 4-5bhp with the shell high octane. But being a new car I doubt you could draw much on a comparison. (injectors etc) but I don't know if this has any truth in it. 
.. .. is it actually worthwhile doing then? Do you put it in with the petrol? Isn't it meant to clean out carbon deposits or something?(full history up to 2010, purchased 2012). It ran fine, but a few tell tale signs such as the need for new plugs, dirty oil etc we're good indications. Thankfully it hadn't covered many miles in those two years.(old) car I added redex to a full tank of fuel. I found my throttle response a lot sharper and it just seemed to idle a little better. It smokes on redex, but as long as it isn't smoking before or after you know your ok. And before the nay Sayers start I believe Jason Plato did a very good dyno test using redex on an old VW Corrado and he saw improvements of about 7bhp after use. And about 3bhp following a good service. So my routine is regular servicing and occasional redex (once a year).- nectar points and friendlier to the knock sensor"naysayers"... and some people saying it actually damaged their engine!! :/ Unfortunately there are no Sainsbury's with a petrol station anywhere near me, though I might have to go looking. BP fuel gains you nectar points as well. Do you know if your Dad used to Redex my car?(or no knock) so the ecu would adjust the timing accordingly (as it would detect knock with cheap fuel), hence giving more power About 2mins in, but the whole things a decent watch. I may have overestimated by about 1hp :/ lol.RazzyRascal wrote:Here's the video if your interested.
Redex etc test
- http://youtu.be/WTaBngvsPrc. For a week or 2 i tried shell normal stuff, Unbelievably the light went away and stayed away til i tested supermarket fuel again, came back after half a mile! I dont think high octane will make a huge difference on an na though. - Tesco 99, Shell V-Power, BP ultimate....RedMR² wrote:On any MR2, I'd use premium fuel
But that's just me.
Shell V-Power, only the best for my girl 
.. just didn't want to go spending extra money for no real gain/improvement. Maybe I'll just go for a tank of premium every few tanks, see if I notice anything. Thanks for the help