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Denso's Twin Tip spark plugs
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03-13-2012, 03:14 AM
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dwtaylorpdx
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Anecdotal reference,,, BMW has been using the twin 4 prong plugs since the 80's...
1995 1.8 318ti gets consistent 34 MPG on the highway with E0 and 30 with E15. at 70...
Dave
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