R129 104 engine which fuel?

[RichardF]

Hi I've been using supermarket fuel in my "94" 320. The engine runs well and I've been getting 25 ish mpg (28 on a run)

Has anyone noticed any difference with Shell Nitro etc?

Performance isn't an issue with me I like economy, smooth running and good pick up.

 

[philepo]

I've never noticed any difference, however, I use use branded fuel as I believe the detergents and other additives will be superior and better for the health of the engine.

 

[grober]

The general consensus appears to be that unless you have an adaptive engine ECU and possibly a turbocharged petrol engine you will derive little benefit from a higher octane fuel. There may be hidden benefits from better additives although this impossible to quantify except in the longer term.

 

[RichardF]

Thanks, I'll stick with the supermarket stuff day to day. I do put the occasional tank of branded petrol in when out of the area.

 

[Thehouseofbrown]

I used to work in the Oil industry - on fuel blending.

There will be no discernible difference in octane ratings between brands. 95 is 95 with a very close tolerance.

In the UK the "fuel in your tank" comes from whatever refinery serves your area/brand. Look it up, there are only a few left.... Recognise your "brand"?

Detergents are the only real issue, these days everyone has them.

It's like the French and bottled water - everyone has a favourite (mine is whatever is cheapest and convenient)

 

[DSB SL AMG]

I know the tankers all come from the same refineries, but I was under the impression that supermarket fuels do not use / minimal additives and detergents blended at the pump? hence why their fuel price is lower...?

I used to work in the Oil industry - on fuel blending.

There will be no discernible difference in octane ratings between brands. 95 is 95 with a very close tolerance.

In the UK the "fuel in your tank" comes from whatever refinery serves your area/brand. Look it up, there are only a few left.... Recognise your "brand"?

Detergents are the only real issue, these days everyone has them.

It's like the French and bottled water - everyone has a favourite (mine is whatever is cheapest and convenient)