...When do you and Pluto learn? Oliver is in LRC because of his age, not because he wants to use different rules. I can guarantee that back when Kalle did Liepaja under LRC he used exactly same type of fuel and tires that ERC drivers use.
And I'm 99% sure that Oliver is doing that also. Oliver is sponsored by Pirelli, do they even have "faster" tire available for him that goes through LRC regulations and they would actually run with Oliver? No.
Pretty sure same goes with Fuel.
Oliver has been equal in pace with Sesks this whole season in Latvia so I don't see any reason why he couldn't do same in Liepaja.