what octane gas to use?
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Rogue_Biker
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Agree. The P5's 2.0 engine has a compression ratio of 9.5 to 1 I believe and that does NOT warrant anything more than 87 octane.
However, if you will be driving at high elevation or in hot weather with the air on or both, it might help to use higher octane to avoid pinging under heavy engine loads. But most of the time, 87 is fine.
However, if you will be driving at high elevation or in hot weather with the air on or both, it might help to use higher octane to avoid pinging under heavy engine loads. But most of the time, 87 is fine.
Rogue_Biker
Member
Motorcycle engines seems to tolerate lower octane ratings better given equal compression ratios than their automotive engine counterparts. Perhaps it has to do with displacement difference. I have a GSX1300R Hayabusa with a 11 to 1 compression or so. It tolerates 87 octane just fine. In fact, that's what the owner's manual says to use. During extremely hot weather though, I feed it 89 Octane. But when I used 92 octane, it made no difference except when I fitted the bike with a timing advancer. So I stick with 87 or 89 depending on outside temperature. For cars, anything with less than 10 to 1 compression should use 87 octane. The lower the octane the faster it burns and the more efficient your car is. Cars like the MP3 and the German ones (BMW, VW, AUDI, etc.) have CR's over 10 to 1 and so they require high octane fuel. That's how they manage to get more hp per displacement and number of valves.
oh ok thanks guys. thats what i thought the mp5 is not a high performance engine so hahahah 87 is what it gets. my previous 3rd gen rx7 would take 94oct and a full tank (75 liters) would only last 350 KMs. ghey huh? thats why i sold it and bought meself a gixxer 600 and a mp5 hahaha
Very few stock Corvette engines ever managed it.
