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Discussion Starter · #1 ·
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)
 

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Discussion Starter · #3 ·
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
 

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Discussion Starter · #6 ·
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.
 
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