[z06seal]

Curious what the gas requirement for the hybrid is. I'd be pretty happy if it was 87, adding to the savings. I'm 99% the regular one is 93 octane as my G37 was.

That's almost 7 bucks in savings per fill up! woohoo! LOL (jk about that, but i'm still curious loL)

 

[hunter81]

It's 93. Sorry. Honestly I'm sure you could get away with 87 considering it's an Atkinson cycle, but I use 93 to be on the safe side. Spent to much on this car to try substitution outside the manual's recommendations.

 

[z06seal]

It's 93. Sorry. Honestly I'm sure you could get away with 87 considering it's an Atkinson cycle, but I use 93 to be on the safe side. Spent to much on this car to try substitution outside the manual's recommendations.

Oh yeah, no way... 93 for sure. but if it was 87, I wouldn't object you know...

I just felt they might have changed compression and all on the engine to make it even more gas cost friendly

 

[kkthind]

highest Octane where i get my gas from has only 92 Octane, doubt it makes a difference with the 93 octane

 

[hunter81]

Oh yeah, no way... 93 for sure. but if it was 87, I wouldn't object you know...

I just felt they might have changed compression and all on the engine to make it even more gas cost friendly

An Atkinson engine (at least the modern day one) uses valve timing to reduce compression by leaving the valve open a short while to push some of the gas/oxygen mix back out of the cylinder during the compression stroke. It simulates a real Atkinson engine which had a complicated crankshaft that would create an asymmetrical engine where the intake stroke was shorter than the power stroke where the fuel was detonated. Since it obviously reduces the compression ratio, you would think 87 fuel would work since octane rating has to do with a resistance to preignition. That being said, I'll stick with what the manual says.

 

[z06seal]

An Atkinson engine (at least the modern day one) uses valve timing to reduce compression by leaving the valve open a short while to push some of the gas/oxygen mix back out of the cylinder during the compression stroke. It simulates a real Atkinson engine which had a complicated crankshaft that would create an asymmetrical engine where the intake stroke was shorter than the power stroke where the fuel was detonated. Since it obviously reduces the compression ratio, you would think 87 fuel would work since octane rating has to do with a resistance to preignition. That being said, I'll stick with what the manual says.

I hear ya... the GM engines (LSx) retard timing to prevent knock.

 

[hunter81]

I hear ya... the GM engines (LSx) retard timing to prevent knock.

I'll have to check that out. Man, all the new tech cars are experimenting with is so much fun to read about.

 

[Vancity808]

highest Octane where i get my gas from has only 92 Octane, doubt it makes a difference with the 93 octane

I go to cheveron everytime, canada usually only goes up to 92 at most gas stations, cheverons got a 94

 

[tempest24]

Yeah I only get 91 out here on Guam so it's the best I can do...on my sti I usually hit octane booster once every 3 months...should I do that to my q? Haven't hit my 3 month mark yet...wondering

 

[Vancity808]

91 should be good enough. it does state "premium" so if thats the level in where you are octane booster is really your only option if you want higher octane. im pretty sure fuel grade varies country to country and maybe even state to state? so our 94 could be your 92

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[kazilla]

Best you can get in CA is 91.