Piers Rendell Posted March 9, 2011 Posted March 9, 2011 Shell petrol Stations are few and far between in Kent and specifically around Canterbury. The nearest at the M20/Folkstone Race Course junction and it is an enjoyable 15 mile run but not practical if I'm heading the other way. If I can't get Shell 98 Ron for the R300 (Rover engine), what other fuel companies have a similar RON rating. I supect it will be BP and Texaco.
sevenmad Posted March 9, 2011 Posted March 9, 2011 I regularly fill up the 7 at J11, I live just off Stone Street, so may see you there!
Piers Rendell Posted March 9, 2011 Author Posted March 9, 2011 Sevenmad - I'm close to Barham and go down Stone Steet to J11 when I have time.
Team Escargot Posted March 9, 2011 Posted March 9, 2011 Suprised you need 98 for a R300 (unless its been modified) they run fine on normal 95
Piers Rendell Posted March 9, 2011 Author Posted March 9, 2011 Caterham Owners Handbook 2003 - page 14 section 2 - R300/400/500 is says 98 RON
eric Posted March 10, 2011 Posted March 10, 2011 The answer could be very simple : the higher compression ratio the higher octane you need to avoid pinking. A good 98 is uprated and your consumption will be lower, then the price is not an issue. However for a trackdays, the 98 will be always adviseable. But the most important is : 98 will not exist in the future, if even the sportcars owners do not buy this grade. Buy 98 now will help you to have it tomorrow , unless you think the future of your caterham is electric .
tbird Posted March 10, 2011 Posted March 10, 2011 surely using 95 or 98 will depend on what you used to have the engine mapped, I don't believe the ecu in Caterham will auto adjust for differing octanes, certainly the CSR runs fine on bog standard 95, which is what CC advised me to use, or am I being stupid Tim
eric Posted March 10, 2011 Posted March 10, 2011 if you use your 7 gently on the road or even on the track, the 95 will suit perfectly. Competion cars or heavy foot owners never use 95 as they know the danger of pinking. At Paul Ricard circuit, there is a fuel pump but the 95 is outside for road going cars. Since 1 or 2 years they did not deliver anymore the 102 racing fuel but only a good 98.
Sheds Moderator Posted March 11, 2011 Posted March 11, 2011 Quoting tbird: surely using 95 or 98 will depend on what you used to have the engine mapped, I don't believe the ecu in Caterham will auto adjust for differing octanes, or am I being stupid No, you aren't being stupid. If your engine was mapped around 98 then you need 98. Alternatively if your ECU has a knock sensor etc and can adjust its settings for 98, then you can get some benefit. Sadly though most engines were mapped for 95 and can't adjust themselves so you don't get any benefit from using a higher octane fuel. 2 edits...I may wake up shortly. Edited by - batteredoldsupersport on 11 Mar 2011 10:07:24 Edited by - batteredoldsupersport on 11 Mar 2011 10:08:36
Piers Rendell Posted March 11, 2011 Author Posted March 11, 2011 Sevenmad - very close. My car is green with yellow stripe and is R300 KWK reg no.I am sure we will pass on another soon.
kenny. Posted March 11, 2011 Posted March 11, 2011 How does 95 and say a glug of Millers or similar octane booster?...........any good?
sevenmad Posted March 12, 2011 Posted March 12, 2011 Mine's a Roadsport, Green and yellow but without the stripe!
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