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I don't know if anyone on here knows but the new 2016 sparks with the new LV7 engines in them have a high compression ratio of 10.6:1

 

if you want increased fuel economy plus better performance, put in higher octane gas. I use 91 in my spark. throttle response and overall performance is noticeably better!

 

the better gas works better with the high compression ratio

 

Edited by Klhuffman
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I've been wondering about fuel type. Here in NZ we have 91, 95 or 98 octane ratings. Plus an ethanol blend but Spark can't use that from owners manual. Plus its insanely expensive!

I've been using 91 and its good. Put a tank of 98 in today for a trial for a near 300km drive and wow, very noticeable performance difference!

However it's NZD$2 a litre - USD$7.60 a US gallon!

I'm going to empty it and try 95 - which is only - only! - $1.92 a litre.

Owners manual says it will take all octanes. Guess wallet is decider as performance even on 91 is more than ok.

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