Hi again all..i recently bought a 1993 325i and want to put in the best oil.I currently use mobil 1 full synthetic 10- 30 in my other cars. i saw mobils 15w50 full synthetic and thought it would be good due to the mileage on my car (182k) but a friend thinks this is too heavy for the car due to bimmers tight bearing clearances,i was figuring that maybe they are not as tight with the high miles what do you guys use? thank you all for your imput
going with heavier oil isn't ever a good idea. I'd stick with 10W-30. The heavier oil moves slower through the engine hence cools it less making more heat. Which of course is bad. You can put it in there if you wish, but I wouldn't. I've been considering going to a lighter oil actually.
My owners manual for my 96 318i suggests regular 10w-30 and my car runs great with it...I am thinking of changing to Mobil 1 synthetic on the next change however (400miles or so)...
__________________ 1996 318i
5 Speed Manual
Alpine CDA-7895 Head Unit
12" Alpine Type-R, sealed box
Pioneer 400w amp for $20 at a yard sale (to replace my fried MRV-1507)
Infinity Kappa 4" 2-way speakers(rear)
Infinity Kappa 5.25" component speakers(front)
Debaffled airbox, K&N filter
Tracked Mud on carpets
Shampooed and cleaned carpets
You may want to also check out this site: www.bobistheoilguys.com. Great info on oil. I'm no expert, but 15W-50 oil sounds way to thick for that engine, even with the high miles. An oil with that viscosity may also create starting problems if you live in an area that gets cold.
i use mobile1 15w 50 and i haven't had any problems it even says in the owners manual what oil shuld you run on yor car depending on the your current wheather or season and i think 15w 50 is recomended for 20f-90f
and here in atlanta for summer the wheather is usually high 80's to low 90's BTW my car is a 92 325i
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