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i am posting in this forum because i do have a D3 and you guys tend to answer quite expertly and quickly.
My 2002 A6 4.2 is due for some new plugs. I think its been over 100,000 miles since the plugs have been changed.
The oem plugs are: OEM: 101905615A MPN: FGR7KQE0 By Bosch
I have also had recommendations of the NGK BKR6EIX Iridium plug. Do the newer Iridium plugs function better? Should I stay with the OEM plug?
On my D2 I went with Bosch Platinum 4+ 4417 spark plugs. It was an upgrade over the Bosch OE plugs and I had no issues. Technology advancements are great.
From having used four prong ones on my 2000 C5 4.2, they work fine/well when engine is in order. If it burns oil, they are more prone to fouling than single prong. In a serious oil burning case like I had later on, I wouldn't use them.
AFAIK, most Audi's use NGK and some now Beru for the original fitment, so I have tended to avoid Bosch plugs since the mid 80's. Had some negative experiences with aftermarket Bosch platinums thet turned me off on them in general. But they sell millions of them as OE equivalent or alternate supplier, so probably fine if OE spec.
Iridiums can run more miles than platinums in general, but platinums technically have a better spark for the best electrode designs. Platinum is a better conductor, though not that great compared to older copper and some others. But there is a trade off between conductivity and longevity, and a copper one for example won't make it 30K miles. Platinums in Audis run 40-60K miles for the intervals, while some platinums run past 100K.
Hi all so here to just help with plug related thoughts. So here is how you can decide easier. So both plug brands are good decisions but here is the major difference between one of the other. So let’s start with ngk plugs. Ngk plugs typicly burn hotter and faster which causes you to for one burn threw more fuel but also brings in a few extra ponies to the engine. Meaning faster take off times and quicker builds in rpms.
Boosch is more of the runner up plug it is built just as well as ngk but it helps the engine burn the gas at a slightly lower heat and short more constant stable kick. They are typically your every day runner plugs if you want to get every penny worth of your gas.
There is other plug brands out there as well like champion or e3 diamond which will also work but there is the pluses and minuses to each and all most people trust the two brands you brought up. The only other brand I ever tried was the e3 diamond plugs. They are like the boosch plugs they have a clean stable burn to them mostly due to the square they disingenuous for the spark point. It creates a even spark that can be grabbed from all angles which helps your fuel efficacy even better then the boosch plugs. But in the end you also loose that quick rpms you gain the more you go down the fuel efficiency train.
so you gotta make your decision based on what you want to do. If you don’t mined a bit more gas burned go with the iridium ngk plugs for faster take offs and more hp. If you want just your average mileage and usual hp and rpms go with the iridium 4 point boosch plugs. If you want to max a mile the fuel effect best you can by plugs go with the e3 diamond plugs.
hope this helps explain the differences and helps you decide on a plug.
Very informative, One of the best posts yet.
"they are like the boosch plugs they have a clean stable burn to them mostly due to the square they disingenuous for the spark point."
Very informative, One of the best posts yet.
"they are like the boosch plugs they have a clean stable burn to them mostly due to the square they disingenuous for the spark point."
Lol auto correct ran away with that word was supposed to be designed lol
I personally go with bosch 4 point plugs myself. I like the regular burn and if the car is running good then you dont have to worry about them for 60,000km ngks can last that long but they tend to need replacement at around 50000km
11-01-2019, 04:07 PM
SPARK PLUGS BOSCH VERSUS NGK
