Quote:
Originally Posted by DigitalNav
Bmw doubles What octane do you run? I get shitty 91 here. DO I just buy new OEM BMW spark plugs all 6 ?
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I use 5 gallons of e85 over at Consrv fuel on San Vicente and the rest 91. Its equates to about e30 or 93 oct. checking your plugs can vary from cylinder 1-6 so checking one may be misleading. If you want to spot check you can pull cylinder 6 since its the easier to get to.
http://www.gnttype.org/techarea/engine/plugs.html
And yes if you replace the plugs go OEM / bosch
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