Running 95 RON / E10 - Page 1 - Boxster/Cayman - PistonHeads UK

Currently running a 2.0 base 718. Am taking the car to Ireland next month, if I recall correctly they only really have 95 RON / E10 fuel available over there, and I usually run Synergy 99. I know they can run on 95 but has anyone experienced any issues with this fuel vs 98 / 99 RON ? As a turbo engine I read better fuel can make more of a difference than NA so do wonder what it will do to the power output. On return I also wonder how quickly it will adjust back to 99. Of course if no differences then I'd consider switching to the cheaper 95 going forwards, but can't believe this would be the case.

As long as the ecu has not been modded, it’ll be fine. Power difference is usually 5ish hp difference from the tests I’ve seen. Main improvement is det protection.

Interesting question Jimbo as I've been considering an Ireland road trip too. Hoping they stock 98+ in Northern Ireland. As mentioned the ECU should adjust but you want to avoid giving it the full beans due to engine knock EDIT to say I have been wondering what the ground clearance is like on the ferry ramps. They seem to deal with it better going to mainland Europe but it seems few people are taking sports cars to Ireland (or buying them there, when I saw the road tax prices I understood why) Edited by SV_WDC on Wednesday 22 January 16:59

Your car will be fine. I’ve ran mine on it on occasion and had no issues. If there was issues with it, Porsche wouldn’t sell cars in Ireland as they don’t get super unleaded at all down south. SV_WDC said: Interesting question Jimbo as I've been considering an Ireland road trip too. Hoping they stock 98+ in Northern Ireland. As mentioned the ECU should adjust but you want to avoid giving it the full beans due to engine knock EDIT to say I have been wondering what the ground clearance is like on the ferry ramps. They seem to deal with it better going to mainland Europe but it seems few people are taking sports cars to Ireland (or buying them there, when I saw the road tax prices I understood why) Edited by SV_WDC on Wednesday 22 January 16:59 You’ll find 97 only except for a few small locations that sell 99, albeit that’s achieved with an octane booster in the fuel. I took my car on the Liverpool to Belfast ferry and no issues with clearance.

There are two concerns with e10 fuel.... 1. Octane rating - the ecu copes with that well enough. Do not worry. A few hp less is not very noticeable. 2. Water absorption in the fuel over time. On a road trip this is not an issue as you are refuelling every couple of days. So should not be an issue. On getting back to civilisation, the ecu will spot the new fuel quite quickly. When I had a similar issue after the nc500, a fill up with Tesco 99octane was adjusted for in 10 miles.

kharma45 said: I took my car on the Liverpool to Belfast ferry and no issues with clearance. Cool, thanks. What are the roads like near Giant's Causeway? Potholed etc? I was planning a road trip up there before headed down South past Dublin & the ferry from Rosslare back

SV_WDC said: Cool, thanks. What are the roads like near Giant's Causeway? Potholed etc? I was planning a road trip up there before headed down South past Dublin & the ferry from Rosslare back The A2 which is the road you’d be following for the causeway coastal route is fine. Like all UK roads at this point, could be better but nothing major to worry about. At least not on the bits I am on regularly. It’s more the B roads and below you need to worry about.