Tim Broyd Posted January 17, 2006 Share Posted January 17, 2006 New car, predominately for road use. Or doesn't it matter? Tim B Link to comment Share on other sites More sharing options...
Bob Corb Posted January 17, 2006 Share Posted January 17, 2006 They're mapped on 95 RON fuel, using 98RON wont do any harm but it wont give you any noticeable increase in performance. They dont have any knock sensor so they cant adapt to higher "quality" fuels. Link to comment Share on other sites More sharing options...
Mick Day Posted January 17, 2006 Share Posted January 17, 2006 Use 95 RON. There is advice from Caterham that under higher stress (track days etc) using 98 RON will help keep oil temperatures under control. Have a search in the archives; posted by Simon Lambert, Caterham service manager. Link to comment Share on other sites More sharing options...
ShinnD Posted January 17, 2006 Share Posted January 17, 2006 Oops. I've been using 98 in my 1.8VVC - i'm sure that was what I was told. Will this have been detrimental? Hopefully not so boring accountant Link to comment Share on other sites More sharing options...
Mick Day Posted January 17, 2006 Share Posted January 17, 2006 98RON costs more; no damage to the engine only to your wallet 😬 Link to comment Share on other sites More sharing options...
ShinnD Posted January 17, 2006 Share Posted January 17, 2006 True. So just to confirm that if I was now to revert to using 95 I would not see any drop in performance? Are we talking many or any bhp? Link to comment Share on other sites More sharing options...
Jason Plato Posted January 17, 2006 Share Posted January 17, 2006 The engine is not capable of producing any more power with the change of fuel . It should perform exactly the same with 95 or 98 Ron fuel . Link to comment Share on other sites More sharing options...
ShinnD Posted January 17, 2006 Share Posted January 17, 2006 Thank you Dave. 95 here I come. I won't tell Mrs Shinn how much extra I've spent on 98 over the last 18 months! Hopefully not so boring accountant Link to comment Share on other sites More sharing options...
Graeme Smith Posted January 17, 2006 Share Posted January 17, 2006 ...although Optimax is better for your engine (evo did a test on it a while ago?) Link to comment Share on other sites More sharing options...
Tom_C Posted January 17, 2006 Share Posted January 17, 2006 And a suitable engine can get a big lift in power on better petrol. My Clio 182 is noticably quicker on 98 octane, but the 99 octane from Tesco seems to really make it fly. Even runs slightly hotter on the temp guage. Cheers Tom FH54WLX - only the car supports ManU, honest! Link to comment Share on other sites More sharing options...
Kevsta Posted January 17, 2006 Share Posted January 17, 2006 Evo have done another petrol test last month with really interesting results. They did, Asda, tesco, shell, BP 95 and then: Optimax, BP 97 and tesco 99 (on an M5 and Golf GTi). Very interesting results. At the end they did say that if you don't use optimax, put one in every now and then for its cleaning abilities. Link to comment Share on other sites More sharing options...
Jason Plato Posted January 18, 2006 Share Posted January 18, 2006 as stated earlier , if the engine has a knock sensor then the engine management can adjust to optimise the ignition to suit a higher octane fuel . The humble K doesnt have a knock sensor so it can reap any advantage from octane . Link to comment Share on other sites More sharing options...
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