JohnA Posted February 22, 2006 Share Posted February 22, 2006 During these cold days you are unlikely to feel any real difference, except if you dare run very high boost. In the summer with fuel evaporation and high ambient temps things are quite different. Also I've found that the 'seat of pants' dyno is usually just that: pants If you've paid money and expect the car to go better, it will feel like it does. It's all in the mind. Nothing beats consistent and accurate measurements over predefined conditions. Link to comment Share on other sites More sharing options...
JohnA Posted February 22, 2006 Share Posted February 22, 2006 They've got the RON figure on the pumps at the Shell garage in Lincoln!! Can you take a quick picture mate? Please. Link to comment Share on other sites More sharing options...
Ian C Posted February 22, 2006 Share Posted February 22, 2006 They've got the RON figure on the pumps at the Shell garage in Lincoln!! You can't say that, that's the last bastion of defence for the tinfoil hatters! JohnA will be down there with a file to take it off in order to shore up his arguments -Ian PS get a photo uploaded if you can! Link to comment Share on other sites More sharing options...
JohnA Posted February 22, 2006 Share Posted February 22, 2006 What bastions and tinfoil hats? Have I missed something here? If Shell have publicly put up signs regarding Optimax I'd like to see them. It would signal a change in their attitude or their product specification, it's not exactly inconceivable. Best thing would be to make them show a spec just like the Tesco99 fuel. But let's go one step at a time: officially claiming 98.6 (or whatever) RON would be a good start. Link to comment Share on other sites More sharing options...
lust2luv Posted February 22, 2006 Share Posted February 22, 2006 But let's go one step at a time: officially claiming 98.6 (or whatever) RON would be a good start. Erm, how about this: "What is octane rating and how does it affect the running of a car? The octane rating is a measure of a fuel's resistance to knocking. Knock, also known as `pinking', occurs during combustion when the fuel-air mixture explodes ahead of the flame front rather than burning smoothly, causing a knocking noise. Using a method established in 1929, petrol is rated on a scale of 0 - 100, and given a research octane number (RON). In the 1920s petrol had an octane rating of around 50 to 60. Today, Lead Replacement Petrol has a minimum octane of 97 RON, Unleaded of 95 RON, Super of 97 RON and in August 2001 Shell introduced Shell Optimax, which with an octane rating of 98 RON is the UK's highest octane petrol." From here. Obviously written before Tesco 99 came out. Link to comment Share on other sites More sharing options...
JohnA Posted February 22, 2006 Share Posted February 22, 2006 yep, that's a step in the right direction. At least here they don't use the myriads of weasel words when I was repeatedly asking the Shell 'expert' about the RON and MON values (that forum has been deleted from the Shell site 2-3 years ago) Next step is to see the figure on the pumps, just like every other make. It will indicate Shell's confidence that Optimax can reach 98RON in random tests from the forecourts (nobody disputes that it leaves the distilleries with 98 or more, it's the final product that consumers get in real life that is being questioned) The full spec is an optional extra (a "nice-to-have") Link to comment Share on other sites More sharing options...
supra dan Posted February 22, 2006 Share Posted February 22, 2006 Also I've found that the 'seat of pants' dyno is usually just that: pants If you've paid money and expect the car to go better, it will feel like it does. It's all in the mind. Nothing beats consistent and accurate measurements over predefined conditions. my feelings exactly Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now