[W140Gill]

I use 95 octane regularly and the engine shows no ill effects. Every 4th or 5th tank I fil...

I use 95 octane regularly and the engine shows no ill effects. Every 4th or 5th tank I fill up with 98 octane as a precautionary measure.

I always stick to 'branded' petrol stations like BP, Shell, Esso and Texaco. I steer clear of cheap supermarket stations as I have heard they do not add certain essential additives to 95 or 98 octane fuel.

 

[W140Gill]

a quick search on the internet will show you what the benefits of a higher octane level ar...

a quick search on the internet will show you what the benefits of a higher octane level are.
The lowest we get in the United Kingdom is 95 octane. This is regular unleaded petrol.
Then we have 98 octane which is classed as super unleaded. This is better for older engines, high performance, turbo charged and other cars which rely on the fuel to lubricate the pistons a bit like old leaded petrol. When running on 98, cars return better MPG and faster performance.

We also have LRP wich is Leaded replacement Petrol. A few years ago the sale of High Performance leaded fuel was stopped and LRP was put in its place. This fuel contains extra additives that replace the graphite which was found in leaded fuel.

We also have LPG (Liquid Petrolium Gas) and Diesel at most of our pumps.