Strange how VAG recommends using no additives, yet the additives within Shell are supposed to be good. Personally, I notice no difference between Supermarket and branded, or 95RON & Super within my VRS TSI, and yes I have tried every fuel going multiple times. In fact I have run more Shell V-Power Nitro+ than anything else during the past 3-months and still notice no difference (I keep trying just in case) . I think that for the TSI engine it is all placebo and no medicine.

 

Also there is no measured in fuel economy for me. It just costs more.

There is a difference between additives (eg: Redex, Millers, Lucas) and an additive pack which is blended with the fuel at the refinery.

I believe the latest EA888 v3 engines (1.8 & 2.0) have both direct and port injectors

 

Any one used  Wynns Direct Injection Power 3  or something like it ?

Only the 2.0 has the port injectors (last time I looked)

My mechanic (not from Skoda). Told me not to put any of that in my car. And fuel (Class) I put in my car already has additives in it.

Edited 2 November, 201510 yr by Croat

Those engines do but I thought read somewhere that manifold injection only occurs during aggressive driving?

My view is that all after market additives are akin to 'snake oil'. To each their own though

 

Indeed, I believe the primary reason for the injectors is to reduce the production of particulate emissions when "pressing on" 

"Wynn´s Direct Injection Power 3 is an aerosol product developed for cleaning the air intake system of direct injection petrol engines."

There is a difference between additives (eg: Redex, Millers, Lucas) and an additive pack which is blended with the fuel at the refinery.

Correct. With petrol the cleaning effect is reduced as it is a cleaner burning fuel, however the power increase (once the cars ECU has adjusted) can be measured, just not by you or I except in particularly highly tuned motors.

Diesel, the Devils drink is filthy by comparison so the additives inserted by the Fuel OEMs do make a difference. Your Tesco, Morrisons, Asda and the like take the bargain bucket fuel, add naff all additional additives to it, then discount it further to entice you into their supermarkets. And it works more or less.

BP and Shell etc take the same fuel and add their chemicals to it which (in some cases) drastically alter the quality of the fuel &/or the cleaning detergents in it. The modern engine will run on anything you can buy but the longer term is where it counts.

I had a an evening out with a friends soon to be BP Chemist husband. He told me some of the reasons why I hadn't noticed an improvement in my fuel economy when filling up with ultimate because I questoned it as a false advertising. His explination, just one tank will not make any difference whatsoever. It will take about 4 or 5 full tanks until the improvements start to show. Most will be internal on the components, performance less so as that's not what it is designed to do.

I put it too the tests as I was only ever monitoring the change over one a tank. On my daily commute over three months I would only ever notice a difference of about 3mpg on bargin bucket fuel to normal BP.

After 3 mths (around 15 full tanks) of BP Ultimate it had improved by another 6 and I was having far fewer forced DPF regens. A total overall average improvement of approx 9mpg for about £5 per tank. Was it worth it... I can't be cetain but know that in my aging 2.0ltr PD TDi Golf MK 5 on 50,000 miles the engine ran better and the DPF was my new best buddy.

I won't touch the supermarket fuels as my Golf behaved like a bitch forever giving my regens and bad starting. Stick plain old BP or Shell and once in a while run a few tanks of Ultimate through her to give the DPF a cuddle and clean out the injector cobwebs.

Indeed, I believe the primary reason for the injectors is to reduce the production of particulate emissions when "pressing on" 

Reduction of particulates is part of it but I think the primary purpose of fitting the port injectors is to reduce the carbon build up in the inlet manifold & inlet valves by introducing a solvent (petrol) into the inlet system.

 

Direct injection is utilised at idle & full load.

 

Port injection is utilised under light engine loads.

 

There doesn't appear to be an overlap of the two systems.  Throttle response during port injection is slightly subdued and I think fuel economy isn't quite as good because the port injection is low pressure and the spray pattern in the combustion chamber is compromised (as it has to get pass the valves, etc).

 

A mate of mine tunes BRz/GT86 which also have the port/DI system.  He's achieved some very interesting results using both systems in tandem.  It will be interesting to see if any of the VW tuners try this.

Only the 2.0 has the port injectors (last time I looked)

 

The EA288 1.8 has FSI and MPI, at least in Europe and therefore Australia. Not sure about the Americas though.