- Joined
- Aug 14, 2016
- Messages
- 3,719
- Location
- leicestershire
- Car
- R230 SL500 in teal blue, R231 SL500 in black. (Vauxhall insignia diesel now sold) Black Ford Mondeo
In my past V8's I've always used super unleaded and altered the timing to give better power. The handbook of my current '06 SL500 states to use 95RON unleaded and I wondered whether anyone uses the super unleaded in their M273 powered cars and whether they felt it made a difference or not?