1st find out what car u r driving. the lifespan of spark plug
varies. some last abt 20,000km, others (high range) can last
100,000km
tyres - this is subjective. check the year of make which is
embossed on side of tyres. if it is older then 2 years, mebbe time
to change. again, check the grip on wet road. this is critical.
tyres r the single most impt factor to getting good stop, not ur
brake pads. if u r using comfort tyres, some may not hv sufficient
drainage and will skid when the tread is reduced. so rather then
waiting for it to go bald, i suggest u change. y? cos in any
accident, u hv to fork out $500 1st, regardless. changing 4 tyres
cost u less. but ur avg mechanic should know nuts abt it though.
also, take a look, if ur tyre is balding one side or uneven tread
or is pregnant in center, then u hv other problems. but the last
one is critical, u must change else it will explode.
air filter - no fix rules either. it's cheap, just change it.
brake pads- for disc pad, u should b able to see them. again
subjective to km. since some pple use them more often then
others.
