Griff Posted March 13, 2007 Share Posted March 13, 2007 So what's the current thinking on best fuel now my local Shell station has become a Texaco? Link to comment Share on other sites More sharing options...
6speedmanual Posted March 13, 2007 Share Posted March 13, 2007 What Engine? 6SpeedManual *tongue*There's no such thing as too much BHP per Ton 😬 Link to comment Share on other sites More sharing options...
Neil_K Posted March 13, 2007 Share Posted March 13, 2007 Still V-Power - it has the best additives backed up by the most R&D available on the market Edited by - Neil_K on 13 Mar 2007 22:53:39 Link to comment Share on other sites More sharing options...
Griff Posted March 14, 2007 Author Share Posted March 14, 2007 It's a K, about 150hp. Just came across this site which suggests that Tesco 99 Super unleaded is the bees knees, even compared to the BP & Shell options. Handy for me provided there are no other unexpected additives... Anybody found it as good as they claim? Link to comment Share on other sites More sharing options...
Nov-07 Posted March 14, 2007 Share Posted March 14, 2007 Yes, and I get TESCO points, and school vouchers 😬 😬 Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted March 14, 2007 Share Posted March 14, 2007 Honest John (Saturday Telegraph) recommends (as I recall) Shell or Texaco for best detergents/additives, etc. Personally, I go for Shell every time - V-Power when feeling frisky ****************** And you run and you run to catch up with the sun, but it's sinking... And racing around to come up behind you again. Link to comment Share on other sites More sharing options...
mikevernontalktalk.net Posted March 14, 2007 Share Posted March 14, 2007 The TMS article made interesting reading but I must say that I haven't noticed any performance increase when using higher octane fuels. Quote: "This apparent gain in power is due to the ECU of the car’s ability to advance the ignition timing to take advantage of the extra power the higher octane offers. Looking at the air/fuel ratio on the charts does show that the higher octane fuel allows a more efficient burn creating more power. " Is this correct? Does the ECU really detect higher octane fuel and advance the ignition timing accordingly? Link to comment Share on other sites More sharing options...
martinwhitcher Posted March 14, 2007 Share Posted March 14, 2007 Only if it has a knock sensor, which the K does not, to make any difference you need to map the car using the fuel Martin MW 51 CAT Superlight No.171 now known as:Superlight DVA 250 Link to comment Share on other sites More sharing options...
prangerman Posted March 14, 2007 Share Posted March 14, 2007 BP Ultimate here in my 1.6K SS. And I regularly get 38-42 mpg including good use of the loud pedal. Peter In Memoriam DMG Link to comment Share on other sites More sharing options...
Little Bob Posted March 14, 2007 Share Posted March 14, 2007 So it makes absolutely no performance difference to a standard K Series (1.8 Supersport) if you fill up with a higher octane fuel? C7 GTE Link to comment Share on other sites More sharing options...
Support Team Shaun_E Posted March 14, 2007 Support Team Share Posted March 14, 2007 2 reasons for using premium brand fuel: 1. Additive package 2. Higher octane fuel appears to have a cooling effect on the engine, expecially on track. and in my case the car was mapped on Optimax! Yellow SL #32 Edited by - Shaun_E on 14 Mar 2007 17:05:51 Link to comment Share on other sites More sharing options...
martinwhitcher Posted March 14, 2007 Share Posted March 14, 2007 No, not on any factory installed ecu'd caterham. Martin MW 51 CAT Superlight No.171 now known as:Superlight DVA 250 Link to comment Share on other sites More sharing options...
martinwhitcher Posted March 14, 2007 Share Posted March 14, 2007 Agree with Shaun, It gives no improvements in performance I would still use it cause of the additives and improved burn characteristics Martin MW 51 CAT Superlight No.171 now known as:Superlight DVA 250 Link to comment Share on other sites More sharing options...
Griff Posted March 14, 2007 Author Share Posted March 14, 2007 So to conclude it sounds like Shell/BP/Texaco/Tesco are much of a muchness. The car might feel if it goes faster on Super Unleaded, but perhaps this is because my wallet's lighter Link to comment Share on other sites More sharing options...
millsn Posted March 14, 2007 Share Posted March 14, 2007 You do get an extra margin of safety against predetonation using higher octane. I use it on track days just in case. Always felt like my zetec went better on optimax though. Now I'm confused as to the branding and just use 95 RON Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted March 14, 2007 Share Posted March 14, 2007 Shell / BP / Texaco - yes. Not supermarkets. Majors put nice additives in when loading the tankers. Much better for engine health. ****************** And you run and you run to catch up with the sun, but it's sinking... And racing around to come up behind you again. Link to comment Share on other sites More sharing options...
MarcNS Posted March 14, 2007 Share Posted March 14, 2007 BP every time Shell stinks (no it really does have a wiff) Supermarket petrol not any more, how do they make Tesco 99 anyway if it is all from Essex, must be octane booster ??? Link to comment Share on other sites More sharing options...
Atinod Posted March 15, 2007 Share Posted March 15, 2007 List of Tesco sites here [selling the good stuff]: here Edited by - Atinod on 15 Mar 2007 07:47:49 Link to comment Share on other sites More sharing options...
Ray Gamma Posted March 15, 2007 Share Posted March 15, 2007 What about standard Crossflows? Is there anything to be gained by spending a bit more on fuel, or is there a simple carb/ engine upgrade/adjustment required that could help? Link to comment Share on other sites More sharing options...
Neil_K Posted March 15, 2007 Share Posted March 15, 2007 Testing my Chemistry here ...... the smell from fuel is evapourating olefins. These olefins are good in gasoline as they are high in energy due to double-bonded carbon atoms, but they're expensive to produce in a refinery - you need a cat-cracker as olefins are man-made and don't occur naturally. Cat-cracked gasoline has a standard RON (before additives) of 92, versus 66 RON for straight-run gasoline (i.e. straight out the CDU - Crude Distillation Unit). The more cat-cracked (olefin rich) fuel is used in the blend - (all finished grade gasoline is a blend in domestic markets), the less additives such as MTBE (115 RON) and Ethanol (132 RON) are needed to boost the RON and the 'cleaner' the end result. 'cough' (geek) 'cough' Anyway ...... the moral of the story is the smellier the fuel better. Where am I? Link to comment Share on other sites More sharing options...
Griff Posted March 15, 2007 Author Share Posted March 15, 2007 So it's a question of "I stink therefore I'm fast" Applies to my race suit at the end of the season, not so sure about the driving speed!! Might make a good T-shirt. Link to comment Share on other sites More sharing options...
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