Fuel Lower millage per tank with 98 octane petrol

gm1980 · 15th May 2008, 05:48

I own the car for two months now and since i got it I used to fill it up with 95 octane by ESSO. The car then averaged about 620 - 640 kilometers per tank. The last 3 fillings were with 98 octane by ESSO and i find it hard to go with more than 600 kilometers to a tank. Has anyone experience anything similar?

Woette · 15th May 2008, 17:31

I dont have any experience with this because my dealer told me explicitly that i had to run it on 95....
maybe because of the vtec system, i didnt ask him

gtz

Clive242 · 15th May 2008, 17:42

I've never had the guts to put anything higher than 95 in mine.

Also, I was under the impression that the higher octane meant you could get the same performance from the vehicle with less right foot pressure.
If so, wouldn't any economy improvement rely on the driver relaxing their driving style?

Does that make sense? I'ts been a long day.

Rich 11 · 15th May 2008, 17:54

I always use Shell Optimax or BP Ultimate with a splash of Millers Octane boost

Andiww · 15th May 2008, 18:45

I used 95 and 98 and there were no difference in milage or engine work. I think there's no sense in buying 98. But i must try it with Vpower racing

Orschild · 15th May 2008, 20:56

According the manual you should use 95 or higher. A higher octane should give you a little bit more power, but going from 95 to 98 is fairly marginal.

Jack The Lad. · 15th May 2008, 21:38

According to the City Wizz Kids, petrol will reach £1.80p per litre by the end of the year. S-d putting anything higher than 95 in the tank. Gawd knows what diesel will be. ??

fbssucivic · 15th May 2008, 22:50

Quote:

Originally Posted by gm1980

I own the car for two months now and since i got it I used to fill it up with 95 octane by ESSO. The car then averaged about 620 - 640 kilometers per tank. The last 3 fillings were with 98 octane by ESSO and i find it hard to go with more than 600 kilometers to a tank. Has anyone experience anything similar?

Higher Octane fuels are really to prevent knocking. Chances are there is no more energy in a litre of 98 than 95.
Cars that require 98 and above have high performance engines.
e.g. a SLK 350 is quite happy with 95 whereas the SLK55 ( 5.5l ) requires 98.

Most engines these days have knock sensors and can adjust the ignition accordingly so running a car that requires 98 on 95 should not cause a problem.

I think the petrol companies push the higher octane as 'better' as they charge more for it and presumably make more money.

15th May 2008, 05:48	#1 (permalink)
gm1980 Locking Wheelnut Join Date: 28th February 2008 Location: Larnaca, Cyprus Posts: 171 Thanks: 2 Thanked 2 Times in 2 Posts iTrader: (0)	Lower millage per tank with 98 octane petrol I own the car for two months now and since i got it I used to fill it up with 95 octane by ESSO. The car then averaged about 620 - 640 kilometers per tank. The last 3 fillings were with 98 octane by ESSO and i find it hard to go with more than 600 kilometers to a tank. Has anyone experience anything similar?

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This thread is about: Lower millage per tank with 98 octane petrol, it's in Engines and Transmission at the Honda Civic forum Civinfo; I own the car for two months now and since i got it I used to fill it up with 95 octane by ESSO. The ...

15th May 2008, 17:31	#2 (permalink)
Woette Triangular Exhaust Join Date: 7th October 2007 Location: Leuven, Belgium Posts: 325 Thanks: 4 Thanked 0 Times in 0 Posts iTrader: (0)	I dont have any experience with this because my dealer told me explicitly that i had to run it on 95.... maybe because of the vtec system, i didnt ask him gtz

15th May 2008, 17:42	#3 (permalink)
Clive242 Why do I come here? Wheelnut Join Date: 29th October 2007 Location: Stuck in 1983 Posts: 98 Thanks: 7 Thanked 1 Time in 1 Post iTrader: (0)	I've never had the guts to put anything higher than 95 in mine. Also, I was under the impression that the higher octane meant you could get the same performance from the vehicle with less right foot pressure. If so, wouldn't any economy improvement rely on the driver relaxing their driving style? Does that make sense? I'ts been a long day.

15th May 2008, 17:54	#4 (permalink)
Rich 11 TYPE R GT (R-15016) Rocketship door handle Join Date: 11th May 2008 Location: Kingston upon Hull (Red & White side), East Posts: 1,660 Thanks: 14 Thanked 40 Times in 40 Posts iTrader: (0)	I always use Shell Optimax or BP Ultimate with a splash of Millers Octane boost

15th May 2008, 18:45	#5 (permalink)
Andiww Locking Wheelnut Join Date: 4th March 2008 Location: Poznan, Poland Posts: 109 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	I used 95 and 98 and there were no difference in milage or engine work. I think there's no sense in buying 98. But i must try it with Vpower racing

15th May 2008, 20:56	#6 (permalink)
Orschild Triangular Exhaust Join Date: 7th January 2008 Location: Sweden Posts: 205 Thanks: 3 Thanked 4 Times in 3 Posts iTrader: (0)	According the manual you should use 95 or higher. A higher octane should give you a little bit more power, but going from 95 to 98 is fairly marginal.

15th May 2008, 21:38	#7 (permalink)
Jack The Lad. Supporter Rocketship door handle Join Date: 28th August 2007 Location: ENGLAND Posts: 1,776 Thanks: 2 Thanked 19 Times in 19 Posts iTrader: (0)	According to the City Wizz Kids, petrol will reach £1.80p per litre by the end of the year. S-d putting anything higher than 95 in the tank. Gawd knows what diesel will be. ??