[twitchy]

Went to Canadian Tire and got myself some cheap tuneup stuff. My car didnt need anything really, so I got 4 liters of Q.S. oil ($8)
a filter ($5)
Spark plugs (Bosch platinum $15)
and a new air filter ($9)

after doing the oil, filter, plug and air filter change....

the mileage got suddenly way better, the engine was WAY more smooth and quiet, revvs up more freely and sounds nicer at idle (the oil change quieted the ticky ticky engine sound)

I know its common sense but the mileage increase amazed me, and I suppose that you probably never notice your mileage getting worse over time and the engine being rougher, etc since it happens so slowly, although to change all these things at once...what a difference!