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Morning People. 2005 ST3, 30k on the clock and it's used for just nipping here, nipping there, no real motorway work. So I'm just wondering if any of you think a bottle of additive in the fuel tank might be a good idea to give it a bit of a flush through? Would it do any harm?

If yes, recommendations?

Thanks for your time.

Simon.
 

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Morning People. 2005 ST3, 30k on the clock and it's used for just nipping here, nipping there, no real motorway work. So I'm just wondering if any of you think a bottle of additive in the fuel tank might be a good idea to give it a bit of a flush through? Would it do any harm?

If yes, recommendations?

Thanks for your time.

Simon.
With modern fuels it is not needed. A decent drive out would be more beneficial to both you and your ST.
 

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Formerly Known As Shep4785
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Not so sure about the modern fuels argument, the pic below is a B7 Audi RS4 so only a couple of years old and was 80bhp down in power!

This is a known problem with the FSI engines (don't think Audi have admitted it), on the other side I don't think I have seen or heard anything about T5 engines coking up.

Head Eye Human body Fluid Iris

Another example

Azure Rectangle Font Slope Screenshot
 

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That's a VAG
direct injection issue, remember there is no fuel to wash off the recirculated crankcase blow-by deposits as its fuel is squirted directly into the combustion chamber.
Would never be a problem on our cars, however I'm curious as to how Fraud has combatted this potential problem with the new mk3 ST direct injection motor.
 
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