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lvan · 03-05-2010, 07:27 AM

This is where I get confused about these engines.

I always ran my M42 on 91+. Some owners keep saying that M52 328is run on midgrade (89octane)..

How is it that M42 that came in 1991 uses 91octane fuel ? Than you got M52 1996 + that uses 89octane? I used to think that more powerful M52 would run 91+.... How is this the case?

03-05-2010, 07:27 AM	#1
lvan 6th Gear Member Join Date: Feb 2004 Location: NG, Republica Srpska / Toronto, ON Posts: 5,124 Car: 1989 Honda CRX My Albums	Octane question about M42/M52 This is where I get confused about these engines. I always ran my M42 on 91+. Some owners keep saying that M52 328is run on midgrade (89octane).. How is it that M42 that came in 1991 uses 91octane fuel ? Than you got M52 1996 + that uses 89octane? I used to think that more powerful M52 would run 91+.... How is this the case?