Question : I DRIVE a Myvi
which has clocked about 36,000km.
My last service was done on June 25 last year at 30,000km using Perodua
semi-synthetic 5-30W with the oil filter changed.
It is now nine months since my last service.
Should I service my car at 40,000km ( 10,000km interval ) or when it
reaches 12 months since my last service ?
I also have a unit of Toyota Avanza ( December 2004 model ).
Recently, I bought a spare tyre from a friend who also owns an Avanza (
July 2005 model ) for use in the rear.
I was told by a tyre dealer to replace my tyres every four years because
a tyre lifespan is about four years.
Should I continue to use my two rear tyres although they look brand new
and with no cracks noted ?
1. If the vehicle has regularly been started and warmed up, even though
it is close to 12 months or more, there should be no problem with the oil.
The biggest contaminant of the oil is water condensation and if the
engine is sufficiently warmed up, this would not happen and you can change
the oil at the required mileage intervals.
2. It is true that tyres have a lifetime of four years if they are left
lying around and unused as they will develop cracks and the effects of ozone
on the rubber will cause the rubber to harden and lose its grip.
Therefore the spare tyres that have been sitting unused for four or more
years should not be used as one will not be sure of their stage of
deterioration and they may fail without warning.
Tyres mounted on the vehicle and running daily are a different issue as
they are regularly inflated and heat cycled, and so will not lose their
properties that easily.