Bp Ultimate???

[Jin Kazama]

OK, so at over 1 bar your car is running quite high boost.  Your first thread referred to the prospect of pontential engine damage  resulting from using BP Ultimate while driven hard,

ps - will BP ulitmate threaten the rx engine @ high performance too?

By running a lower RON fuel to the one your ECU\'s map was configured to, even by one point.. would be introducing a risk (albeit very small) of premature detonation (pinking or knocking).. which incidentally can mean the death of your rotary engine. As your engine is in quite a high state of tune and mapped for 98 you should put 98 in and no less..at least that way you will be safe. Using a higher RON fuel than this or booster additive, although not harmful to your engine..would simply be a waste of money.
 If you have a commander (assuming your ECU is a PFC) you can monitor the knock levels if you choose to put lower grade fuel in although I really do not recommend this.

[gsb876]

Thanks for the info matey:)

Will have to travel the little extra distance to get Optimax then:(

[shaunwil]

Couldn\'t you just have it setup to run on 95 RON so at least you know its always going to run safe (as safe as a rotory can be). Would it be ok for the injectors ? For the cost of super (can easily be as much as 6p a litre more ) isn\'t it just better to have it setup to 95 RON ? Won\'t any pfc or the like be paid off by the cheaper fuel bills, even though your putting more in it tank ?

Shaun

[gsb876]

I think on the performance side of things its not ideal to use 95ron, especially with my car setup running a T78 turbo you wanna put the best stuff in??

I guess if you have a completely standard rx and are not gonna be driving hard then yes it would be better to set it upto run 95ron;)

[scooby_si]

either which way better fuel has to be a good thing (OK watch some smart ass prove me wrong lol) & when things can get expensive when things go pop in the night http://www.smileycentral.com/?partner=ZSzeb008\' target=\'_blank\'>http://smileys.smileycentral.com/cat/10/10_5_132.gif\' border=0> so for me it\'s always optimax (make a point of always trying to know where they are on wotever route i\'m taking...) with a portion of NF from time to time just to make sure. Then i do have 30 bottles of the stuff still & a nice optimax reward card so be rude not to :god
Si
PS look another shark thing:

[Jin Kazama]

mmm..Optimax reward card :confused: tell me more. I never new they existed. The only promotion Shell have done to my knowledge is the trump cards.

[Shark]

usual reward card... points mean prizes type stuff.

There are forms to get them in most shell stations, but I don\'t recall ever being offered one.  I figured they must do one so looked for the leaflets.

[Jin Kazama]

I just did a search but nothing came up. I will have to enquire though...all the thousands of pounds on optimax I\'ve spent with no reward, only to find I could be a proud owner of a can opener, or one of those Texas electronic personal organisers...or a glass set..or crease resistant trousers..

[ScuttleRX]

regarding the mapping to 95 ron question, am I right in saying that mapping to a higher octane fuel would allow you to use a more aggressive/powerful map without increasing the risk of detonation, i.e if there were two identical cars one mapped to 95 and one to 98, the 98 would be the better performer?

[Jin Kazama]

Absolutely. The higher safety margin/ decreased likelihood of det occuring of the latter will allow more advanced ignition and higher safe levels of boost pressure attainable by the engine tuner.

[scooby_si]

it is basically an add on to the standard reward card as i understand it where you get extra points for erm can\'t remember if it\'s it\'s twice as many or sumin 1/4ly based on how much you spend. Dont think you can actually ask for one i got mine after nearly 2 years of using the normal one so presuming they still do it i guess it just takes a while for them to recognise yer addiction http://www.smileycentral.com/?partner=ZSzeb008\' target=\'_blank\'>http://smileys.smileycentral.com/cat/7/7_15_10.gif\' border=0> lol
Si (gloat mode on! lol)