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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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