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motorwerks · 02-13-2009, 07:14 AM

The bosch 4 are a waste of money IMO. There are quite a few people on other BMW forums that complain that the bosch 4's caused more problems than anything.

Spark plugs - NGK BKR6E Less than $2 a plug, and they will work as good if not better than every plug on the market.

Replace a quart of oil with a quart of slick 50. You might want to consider running a slightly heavier weight oil as well. This will help keep the oil from leaking out of the seals as fast.

I would change the oil, and run the slick 50 a little bit before changing the plugs. Changing the plugs should fix your power issues, you could also consider "seafoaming". I've never done it on a 4 cyl, but on a six you just run it thought the brake booster line. "youtube" seafoam BMW

02-13-2009, 07:14 AM	#4
motorwerks Name: motorwerks Title: Sitting in Time out Status: Offline Join Date: Dec 2008 Location: central Pa Rate My Car: 164 / 340 Your Ride: '97 328i	The bosch 4 are a waste of money IMO. There are quite a few people on other BMW forums that complain that the bosch 4's caused more problems than anything. Spark plugs - NGK BKR6E Less than $2 a plug, and they will work as good if not better than every plug on the market. Replace a quart of oil with a quart of slick 50. You might want to consider running a slightly heavier weight oil as well. This will help keep the oil from leaking out of the seals as fast. I would change the oil, and run the slick 50 a little bit before changing the plugs. Changing the plugs should fix your power issues, you could also consider "seafoaming". I've never done it on a 4 cyl, but on a six you just run it thought the brake booster line. "youtube" seafoam BMW Last edited by motorwerks; 02-13-2009 at 07:19 AM..