Is Supermarket Fuel Bad ?!

[190]

In 2007, I removed the injectors rails on my V6 Omega (port injection):

V6 Plenum removal - addendum for 2.6 & 3.2

V6 Plenum removal - addendum for 2.6 & 3.2

www.omegaowners.com

At that point the car covered 40,000 miles using Redex with each tankfull - the injectors' surfaces were all shiny squeaky-clean metal - no deposits or residue - that was good enough to convince me.

Ther is a cheaper alternative to Redex. 2 stroke oil has a similar cleaning effect. The very nature of 2 stroke engines means they tend to produce carbon so 2 stroke oils are high in detergents. If you dose petrol with small amounts of 2 stroke oil it's effectively adding detergent.

As a fuel additive the type of 2 stroke oil used should be to the marine TCW3 spec. The additives used in TCW3 oil are ashless so that outboard engines don't pollute the water. That makes it the best choice for dosing petrol in the ratio 1:640. I've used it for 10 years in my motorcycle and over time it does visibly clean the combustion chambers and piston tops.

I know that many others do use TCW3 in modern cars but I've shied away from it over concerns that it might pollute the cat, although if it's ashless it shouldn't. It's similar to the difference between 229.5 and 229.52 engine oil in that the 229.52 additives are ashless in order not to block the particle filters.

 

[Phil1968]

Does running on 95 Ron have an effect on the performance of the car?

It'll tell you in the owner's handbook what grade your car can run on, my handbook says mine is fine on 95 so that's what I run it on, with the occasional tank of 97 premium. Yours being an AMG with a higher state of tune may well be different, as although my CLS is a V8 it's not an AMG.

 

[Phil1968]

Nothing to worry about. Just pull back on the lever.

View attachment 134146

Retard!

 

[rf065]

Ther is a cheaper alternative to Redex. 2 stroke oil has a similar cleaning effect. The very nature of 2 stroke engines means they tend to produce carbon so 2 stroke oils are high in detergents. If you dose petrol with small amounts of 2 stroke oil it's effectively adding detergent.

As a fuel additive the type of 2 stroke oil used should be to the marine TCW3 spec. The additives used in TCW3 oil are ashless so that outboard engines don't pollute the water. That makes it the best choice for dosing petrol in the ratio 1:640. I've used it for 10 years in my motorcycle and over time it does visibly clean the combustion chambers and piston tops.

I know that many others do use TCW3 in modern cars but I've shied away from it over concerns that it might pollute the cat, although if it's ashless it shouldn't. It's similar to the difference between 229.5 and 229.52 engine oil in that the 229.52 additives are ashless in order not to block the particle filters.

I used 2 stroke in my CLK220CDi for over 10 years without any problems, as you say, always low ash.

 

[geoffus]

In 2007, I removed the injectors rails on my V6 Omega (port injection):

V6 Plenum removal - addendum for 2.6 & 3.2

V6 Plenum removal - addendum for 2.6 & 3.2

www.omegaowners.com

At that point the car covered 40,000 miles using Redex with each tankfull - the injectors' surfaces were all shiny squeaky-clean metal - no deposits or residue - that was good enough to convince me.

I bought a 12 year old Peugeot for the wife a few years ago, it had done 36,000 miles as it belonged to a little old lady and used mainly for shopping and the garden centre.
As far as I know had always used cautiously and pootled around the town, the rear tyres were hardly worn but had very deep age cracks as were original, when it developed a small oil leak in the head gasket I removed the head, the internals were sparkly clean with little if any carbon build up.
I doubt very much the little old lady used V Power or Redex.

 

[ALFAitalia]

Another thing to remember is that any fuel sold in the UK has slight variations in Octane etc from batch to batch....so anything sold as 95 ron....is 95 ron MINIMUM.