Ok, well if the engine is requiring new plugs every 3k, you might want to switch to a cooler/hotter plug? But you're right that there is no harm in changing them even if they don't need it. Can you imagine this guy domino877, at $25 per plug, that's $100 every time to change the plugs on a 1.8T. Arif, yoursynthetic oil changes would cost $130 with those plugs, haha, J/K.

 

hahaha that's why I dont buy expensive plugs and also I do not need. I use NGK BKR7E (there are many bt guys also using it)which is one step cooler than the original plugs. I use royal purple / mobil 1oil, and K&N oil filter. About $40 I think.

 

That's good. I use mobile 1 sythetic and the mobile 1 filter. I just got an awsome deal at Advance Auto a few weeks ago-> 5 qts mobile 1 plus a filter for $30. I picked up 20 qts of oil and 4 filters!!! It was a good price.