Hallelujah I have a leaky rad!!! So what type of oil, plugs and filters should I use?
I was losing about a quart of coolant every couple of days in my new to me 1997 328i with 105km. I had yellowy "mayonnaise" under my filler cap, a bit on the dipstick, and steam from the exhaust when I started it in the morning.
I was counting on getting a head gasket job done and a new mortgage on the house. Turns out it's a leak in the top right corner of my rad. The mechanic showed me that when he squeezed one of the hoses, coolant leaked out. He asked me if I wanted to order the $300+ rad from the dealer and I quickly said no way. He threw a bottle of radiator stop leak fluid in and it has been fine ever since. My other "symptoms" are caused by my 1 km commute to work in the morning and the sub-zero temperatures here.
I now want to go over the car thoroughly and would like some suggestions regarding type of air filter, type of oil (dino, synth, olive) and filter, and plugs to use. I'm not averse to some modest performance gains or spending a bit of money. I am considering a cold air intake (short style) or regular K&N filter, full synth, and Bosch +4 plugs.
You guys know more than I do. What works well on a '97 328i?