I got this from friends, FYI, i am using 95 since i got my sunny
Sep04.
Regarding your sms earlier, using
95 petrol is good enough already. The difference between 98 and 95
is the Octane level - 98 petrol has lesser impurities than 95,
which means it helps in smoother operation of the engine. Most
people will use petrol with higher octane level for older engines,
new engines is ok to use 95 unless you wanna let the gasoline
manufacturers make more money off of you! Best way is to check your
car manual or gas tank to see, I can help you if you don't know how
to find it.
By the way, I managed to consolidate some information below which
might be useful for you:
The composition of the chemicals which comprise petrol can vary
widely. High quality petrol should have the right octane level to
prevent knocking; strong cleaning power to prevent carbon build up,
deliver more miles per gallon and ensure engine life is maximised;
and the correct volatility to ensure vehicles accelerate smoothly
and start first time.
The octane rating is a measure of a fuel's resistance to knocking.
Knock, also known as `pinking', occurs during combustion when the
fuel-air mixture explodes ahead of the flame front rather than
burning smoothly, causing a knocking noise.
Most cars are designed to burn regular unleaded gas with an octane
rating of 87. If the vehicle needs a higher octane rating this
requirement is noted in the owner's manual and usually under the
fuel gauge and by the gas tank.
The recommended gasoline for most cars is regular 87 octane. One
common misconception is that higher octane gasoline contains more
cleaning additives than lower octane gas. All octane grades of all
brands of gasoline contain engine cleaning detergent additives to
protect against engine deposit build-up. In fact, using a gasoline
with too high of an octane rating may cause damage to the emissions
system.
WHAT IF I PREFER TO USE GASOLINE WITH HIGHER OCTANE RATINGS?
You can, but there are no real benefits, other than the gasoline
manufacturers making more money off of you. When you use a fuel
with a higher octane rating than your vehicle requires, you can
send this unburned fuel into the emissions system. It can also
collect in the catalytic converter. When you over stress any
system, it can malfunction or not do what it was designed to do
properly. In the early 90's, an early warning symptom was a rotten
egg smell from the tailpipe. Easy fix, go back to using regular 87
octane gasoline. The rude odor usually disappears after several
tanks of gasoline.
