Guest Posted February 13, 2012 Share Posted February 13, 2012 I have a query with spark plugs for my car. My MA9 has a D15Z3 VTEC-E engine and am wondering what is the best spark plugs for this engine and what othe people are using.The cam cover states using NGK ZFR5F-11 however the EPC also lists ZFR6F-11 which I think is for the later D15Z8 VTEC-2 engines or does this plug work better.In the past the car has been running well on NGK BKR6E-11 plugs however these are not the right ones for this engine.Now NGK also lists the iridium ones for my car the ZFR6FIX-11.So my question is out the 4 which ones would be best suited for D15Z3.Any other 1.5 owner what are you guys using ? Quote Link to comment Share on other sites More sharing options...
gofra Posted February 13, 2012 Share Posted February 13, 2012 I would stick to OE - originals Quote Link to comment Share on other sites More sharing options...
Guest Posted February 13, 2012 Share Posted February 13, 2012 OE for this engine is NGK ZFR5F-11 or ZFR6F-11 Which is better ? Quote Link to comment Share on other sites More sharing options...
gofra Posted February 13, 2012 Share Posted February 13, 2012 Neither.According to manual the right ones are ZFR6S-11 by NGK Bw,F Quote Link to comment Share on other sites More sharing options...
Guest Posted February 13, 2012 Share Posted February 13, 2012 Are you sure thats for a D15Z3 i have never heard of them even the honda EPC does not list them ! Quote Link to comment Share on other sites More sharing options...
gofra Posted February 13, 2012 Share Posted February 13, 2012 Ugh, sorry mate - thats for D15z8 - will check in the manual for the D15z3 tomorow and let you know! Quote Link to comment Share on other sites More sharing options...
gofra Posted February 14, 2012 Share Posted February 14, 2012 I have checked mate - D15z3 is an earlier Vtec - E not covered in my manual. Im sorry I miss guided you...I hope you sort it out!Best,F Quote Link to comment Share on other sites More sharing options...
hickster Posted February 14, 2012 Share Posted February 14, 2012 I have never found the NGK lists to be innaccurate so far. If they think you can run ZFR6FIX then I would do it- they work well on the z8. If Honda list ZFR6 as oe I presume they updated them during the production run of that engine; I expect the differences are small. ZFR's are not that different to BKR's used on non vtec D's- as you have found out. Quote Link to comment Share on other sites More sharing options...
Guest Posted February 15, 2012 Share Posted February 15, 2012 Right after some more detailed research turns out the right plugs for the D15Z3 engine are as follows as according to the official workshop manual:NGK ZFR5F-11 - For all normal drivingNGK ZFR6F-11 - For hot climates or continuous high speed drivingThe cam cover also lists ZFR5F-11 so I shall be buying these tommorow.A shame I spent £30 on the iridium ZFR6FIX-11 ones just 2 months back ! Quote Link to comment Share on other sites More sharing options...
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