Discussion
classicyanktanks said:
Regular cheap unleaded, American petrol is 86 odd ron and our standard is 96 so they are very happy with British fuel.
American octane measuring is different to our UK/European standard - but as you say cheapest fuel should suffice if you have a 'cooking' two barrel carb'd cruiser. Something more performance based (higher compression etc) would benefit from better fuel. roscobbc said:
classicyanktanks said:
Regular cheap unleaded, American petrol is 86 odd ron and our standard is 96 so they are very happy with British fuel.
American octane measuring is different to our UK/European standard - but as you say cheapest fuel should suffice if you have a 'cooking' two barrel carb'd cruiser. Something more performance based (higher compression etc) would benefit from better fuel. Our fuel is measured in RON. US fuel is measured RON/MON.
Without getting all technical, US 91 octane is the equivalent of reguar unleaded (95) and US 93 octane is like Super Unleaded (97/98)
Most modern US cars will run on 91 (even supercharged ones if stock) as 93 is not available in all states.
If you have a 50's or 60's car without hardened valve seats, then you nead to run a lead additive through it now and again.
roscobbc said:
American octane measuring is different to our UK/European standard - but as you say cheapest fuel should suffice if you have a 'cooking' two barrel carb'd cruiser. Something more performance based (higher compression etc) would benefit from better fuel.
Not being rude but I've run a 427 ford ex nascar engine for 11 years on cheap tesco fuel. Saying that I did put aviation fuel in a chainsaw once, should have seen that go!Edited by classicyanktanks on Saturday 13th January 15:57
classicyanktanks said:
roscobbc said:
American octane measuring is different to our UK/European standard - but as you say cheapest fuel should suffice if you have a 'cooking' two barrel carb'd cruiser. Something more performance based (higher compression etc) would benefit from better fuel.
Not being rude but I've run a 427 ford ex nascar engine for 11 years on cheap tesco fuel. Saying that I did put aviation fuel in a chainsaw once, should have seen that go!Edited by classicyanktanks on Saturday 13th January 15:57
When 5 star leaded was being phased out I had to source Tetraethyl lead additive for the completely stock 71' Mustang I had at the time to even get it to tick over without stalling. Mind you it was a factory 'saturday night special' with 429 SCJ 429 engine and compression ratio of 11.3 (or 11.7) to 1...............
Edited by roscobbc on Saturday 13th January 16:32
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