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#1
14th November 2012, 04:22 PM
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Spark Plugs - Recommendations
What are people's recommendation with regard to the make of plugs and recommended suppliers. Bosch were recommended by Conan in another thread but the Super 4s were dismissed in one forum for causing misfires. Others trashed Iridiums (but no manufacturer was mentioned). As the price for a set can vary between £24 and £84 I am keen to make the right choice at the right price.
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2002 D2 S8 – Ming Blue, Valcona leather, Vavona wood insert, solar sunroof (to be fitted), Heated rear seats, extended leather pack, 18” Avus, ski hatch, Bose, auto dim rear view mirror, rear blind. 
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#4
14th November 2012, 08:10 PM
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I've gone for OEM Audi RS 2 plugs. They're supposed to be the best. Run colder or something, look it up.
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2009 Audi RS 6 Saloon V10 - 420mm Ceramics, Keyless, Soft Close, Adaptive Cruise, Glass Sunroof, Blinds, Twin Pane & UV, Freeview & DAB, High Beam Assist, MTM bits, Audi Exclusive Bits, MRC, Milltek, GYEF1 ASY2's, Bluetooth streaming music to AMI mod - 753 PS/1021 NM 2016 Audi S3 Saloon, Sepang, S-Tronic - B&O, Tech Pack etc... Company Car 1995 Audi A8 4.2 V8 quattro Sport - Bose, Solar, Blinds
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#5
15th November 2012, 05:39 AM
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Colder is not necessarily better. They need to be in optimal range. For tuned cars that are pushed hard often it is usually good idea to use colder then original plugs. But on stock cars with easy life, short driving distances colder plugs will get carbon building up.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure
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#6
29th May 2013, 12:39 PM
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Enjoy laughing at mine...
Recently replaced the spark plugs in my A8L FL, as I wasn't sure that they had been done. Looking at the attached picture, I'm surprised the old girl even managed to start every day!
Replaced FGR7 KQEO with FGR7 DQP+ which are the platinum/iridium jobs. When I started her up after the plug change, there was some rough idling for a minute or so. I'll assume that the ECU was recalibrating due to the new spark plugs. Two weeks later, I'm thoroughly enjoying the response under even light acceleration. I can hear more burble of the muted V8 when giving it some beans. Cheers, John G
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