Petrol octanes and mileage

cleong SG

Hi,

I got a question about petrol octanes. Does the extra mileage offered by 98 octane petrol outweigh its extra cost versus pumping 92 octane?

I've recently switched to fuelling up with 98, but a quick calculation showed that i was still getting 11km/litre, which is around my normal mileage on 92 anyway. But for just for that tank, my driving cycle changed (ie more urban driving than highway).

Anyway, I've pumped another tank of 98, resumed my normal highway driving cycle. So I'll see how consumption goes.

pqr SG

What petrol are u pumping? Shell? SPC? Esso?

I was pumping SPC middle range petrol (cos got 10% discount) before switching to Esso 8000.

But I find that the SPC petrol need to refuel more often as compare to Esso.

So, in my case, although Esso is more expensive, but i do save per month.

But then again, there are drivers who claim that SPC give them better mileage, So i guess the factors that affect are:

1) Driving habit esp if is it CBD or town.
2) Engine

cleong SG

What octane is middle-range SPC, and what range is Esso 8000?

I do my pumping at Shell (whether 92 or 98 ).

In terms of habits, I usually drive 90% highway, but since the last two weeks was the uni term break, I went out and about town instead. Lots of stop-go situations.

The engine? Its a Toyota 3VZ-FE mated to an automatic tranmission. Not the best for fuel economy, but in light of rising petrol prices, we all do what we can.

pqr SG

i can't remb what is the SPC petro that i pumped...sorry

If u r 90% highway, then it should not consume as much as city driving.

What do u mean range for Esso 8000?

A lot of go-stop situation will increase FC. U can always ask those who work in CBD area.

cleong SG

Oh I meant what octane is Esso 8000, is it 98?

zheshi SG

In Esso there aRE 2000,5000,8000...it mean 92,95 and 98 ...just their way of putting only..