OK, so the guys trow Mobile 1 10W-30 (US Version) in my car. I was told its not the proper oil and will need to be change out back. OK, I also have a little ticking noise coming from my motor. And was told to use a little thicker and BMW recommend oil.

So I got 0W-30, is that thicker than the US 10W-30 or is it the same.

Some one suggest use I believe 10W-50 Synt of course.

The car: 01 330Ci with 95K.

How to interpret the viscosity numbers -

Rule #1 - The number before W indicates viscosity at low temperatures (0 C or so). The one after W indicates viscosity at high temperatures (100 C or so)

Rule #2 - Higher the number, higher the viscosity.

Hence, 10W-30 is thicker than 5W-30 at cold temperatures because 10>5 and is about the same when hot. Of course, this is a simplistic way to compare two oils and there's probably a lot more to it.

0W-30 is actually thinner than 10W-30 when cold (which is actually a good thing for cold climate) but not very different at normal running temperature. I would guess you need thicker oil when the engine is fully warmed up. If you certain of this, go for 0-40 or 10-40. 10-50 might be too thick warm.

I would walk into the stealership and buy whatever BMW recommends for that mileage.

Ok, little oil lesson. 0w30 and 10w30 are called "multi-viscosity" oil. The second number (the 30), is the actual "weight" of the oil - its thickness, or viscosity (viscosity is defined as "resistance to flow". water has a very LOW viscosity, molasses has a very HIGH viscosity). The first number (the zero or the 10) describes how well the oil will flow at cold temperatures (I don't know if they test at freezing or at zero degrees or what - doesn't really matter). So a 0w30 is a 30 weight oil that will flow at the same rate as a zero weight oil (very light oil) would flow at whatever cold temperature they test at. And a 10w30, is also a 30 weight oil that will flow the same as a 10 weight oil would flow at that cold temperature.

So, the difference between a 0w30 and a 10w30 is about the same difference as ... oh, say... the difference between chocolate chip and chocolate chunk cookies.

In short, your engine will be fine, lots of people use 0w30 and have no problems at all. Don't change out the 10w30 for a 0w30, that's just dumb. Use the stuff you bought for your next oil change.

Does it tick after the car warms up? I'd switch to something a drop thicker for the higher temp weight.

You FuCl<ing guys sound like a text book. Since I search and asked people questions. This is about the best explaination I can get that I understand. :handclap:urtheman

Does it tick after the car warms up? I'd switch to something a drop thicker for the higher temp weight.

Yeah, its a very small thicking, i'll go look for some 0W-40.
Or what will you guys recommend, I currently got 10W30 in there, that the dumb ass local shop put it, thats what my dumb ass get for taking it there. Reg Mobile 1 Full Synt 10W-30. So the 0W-40 will be a little thicker/heavier?

Holy shiite! You understood that??!

:woot:

Yeah, its a very small thicking, i'll go look for some 0W-40.
Or what will you guys recommend, I currently got 10W30 in there, that the dumb ass local shop put it, thats what my dumb ass get for taking it there. Reg Mobile 1 Full Synt 10W-30. So the 0W-40 will be a little thicker/heavier?


Right, the 0w40 will be a little 'thicker' at operating temp and flow a little better at low temp than the 10w30. But I wouldn't go changing it out right after you just changed it just for that.

So, the difference between a 0w30 and a 10w30 is about the same difference as ... oh, say... the difference between chocolate chip and chocolate chunk cookies.

Hahaa, gotta love that one :lol