Reply To: Welcome to the new forum Great British Handcrafted Motorcycles › Forums › * New members – Introduce yourself here › Welcome to the new forum › Reply To: Welcome to the new forum 10 October, 2022 at 5:30 pm #13225 David 252Member I use E5 when I can, E10 is ok to use as I have been for the last two years and 8k miles so far. E10 doesn’t cause any running issues.