The best way and cheapest is follow your owners manual for what parts you requires to undertake the 100,000klm service. Repco have some deals where you get the oil, filter and possibly air filters and plugs all for a one low price. The key here is follow your book and you cant go wrong. I service all my customers cars by the handbook and they dont have any problems. The cars that usually turn to crap are the ones that dont follow their books even if they do it themselves. :hit: The key is also to use quality parts such as oil that is the suitable grade for your car eg. Valvoline XLD PLus or equivalent and GOOD quality coolant is a must ( I use Valvoline GO5 premix). Not cheap but good quality. I find it easier to use all the same manufacturers lubricants as its more economical for my workshop and their backup is great!! Hope this post helps you. :wave: