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yung 12-01-2011 12:22 PM

e36 spark plugs

Firstly let me introduce myself as i'm pretty new to this forum/bmw, my names Gavin and i resently got myself an 95' 325i.

So last night i decided to inspect my cylinders with a baroscope to see how much carbon build up has been going on (265k km) and i found that my spark plugs have been fuel fouled to shit.

so im wondering, what spark plugs are best for this car?
currently it has the bosch platinum + 4 post plugs

thanks much!

Mystikal 12-01-2011 01:10 PM


Dr. Flyview 12-01-2011 03:37 PM

^^ Those are copper. I've read they're best for performance but need to be replaced more often than platinum.

I use NGK BKR6E which is the single prong (BKR6EK is the double prong). I think either is fine.

yung 12-06-2011 12:22 PM

thanks for the reply guys
may i ask why they're good? and how much do they usually go for /where i can buy?

sproule905 12-06-2011 02:10 PM

^ crappy tire...

SiR 12-06-2011 02:50 PM


Originally Posted by Dr. Flyview (Post 1537240)



325iA 01-02-2012 02:32 PM

Over the last year (14 months) I've had my best fuel economy ever using a set of Bosch Platium IR Fusion plugs(Bosch p/n 4503), which are basically the same as the Platinum +4 except the center electrode is Iridium.

I was consistantly getting 32MPG+ tanks all year, with numerous 34MPG tanks, a couple of 35MPG tanks and even a 38MPG tank going to Ottawa---36MPG on the way back. It's crazy considering that the highway fuel economy rating for the car is 34MPG (and I'm not driving 100kph...).

Previously, I used the factory-spec Bosch Super copper plugs with dual-ground electrodes (F7LDCR). They worked well but fuel economy was much better with the IR Fusions. But the IR Fusions are more prone to cold-fouling if you start then stop the engine quickly (like moving cars around a driveway) but clean quickly.

But if you're getting foulled plugs (and they're not worn) is it your driving style? (more city than highway?) Do you idle excessively or let your car warm up? If not, than maybe your injectors aren't spraying properly.

For the record, I only used Shell V-Power and I literally started the car, drove up the street, and then onto the highway, then exited off the highway to work so I was operating it in ideal conditions to get these results. And the V-Power really does work, as every time I pulled the intake manifold off, the intake valves were shiny clean with no deposits.

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