Premium gas in R18??

pks17 · 11-01-2007, 06:49 PM

Anybody else notice that the base model civics have a 10.5:1 compression??
thats pretty high, its actually higher then any B16 made and just .1 lower then the type R i believe. s2000 is 11:1.
Honda says that they use a oil sprayer on the cylinder walls to reduce heat and therefore a lower octane gas can be used, but i can hear pinging everynow and then at low speeds.
So does anyone notice a difference with premium gas?
The Honda manual states" the engine is designed to run on regluar octane pump gas OR HIGHER.

rickhilbert · 11-01-2007, 06:50 PM

Double posts??

**NBPRudy** · 11-01-2007, 06:55 PM

REG or PREMIUM fuel on 10.5:1 R18??

**dentrecords** · 11-01-2007, 06:58 PM

Please search, this has been covered many times before.

We even have a sticky thread on the subject. Also, please don't create two threads with the same question.

What grade of gas? All gas questions answered! **Merged all gas threads**

11-01-2007, 06:49 PM	#1 (permalink)
pks17 Senior Member Join Date: Nov 2007 Posts: 787 iTrader: 0 / 0%	Premium gas in R18?? Anybody else notice that the base model civics have a 10.5:1 compression?? thats pretty high, its actually higher then any B16 made and just .1 lower then the type R i believe. s2000 is 11:1. Honda says that they use a oil sprayer on the cylinder walls to reduce heat and therefore a lower octane gas can be used, but i can hear pinging everynow and then at low speeds. So does anyone notice a difference with premium gas? The Honda manual states" the engine is designed to run on regluar octane pump gas OR HIGHER.

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11-01-2007, 06:50 PM	#2 (permalink)
rickhilbert Senior Member Join Date: Mar 2007 Location: Milwaukee Posts: 1,014 iTrader: 1 / 100%	Double posts??