5w-30 vs. 5w-40 for N52 engine?

[Fraser Z4]

Hi Guys,

I'm going to do an interim oil change on my Z4 shortly. It's got the N52 motor so requires LL-04 spec oil. This comes in both 5w-30 and 5w-40 weights, is one preferable to the other?

I think BMW supplied oil is Castrol Edge, but looking on opie oils website there's also Fuchs Titan GTI, Motul LL-04 specific, Millers XF longlife etc. Does anybody have any oil recommendations?

Thanks

[mmm-five]

If you regularly drive the car in a 'spirited' manner then go for the 5W-40, for normal use the 5W-30 will be fine.

Opie are not always (seemingly less & less) the cheapest either. Costco are currently selling LL04 Castol Edge for about £25 for 4L - compared to Opie's £45+delivery. Which is strange considering they're fully synthetic and the increasing price should have no relation to do with the increasing price of crude oil.

[honest_delboy]

5w-30 castrol edge for me, mmmm. Z4 3.0

[kchika]

Sorry to hijack the thread, but what does everyone think of the Mobil 1 0W-40 for a M54 (E46 330i)?

[Mr Whippy]

kchika said:

Sorry to hijack the thread, but what does everyone think of the Mobil 1 0W-40 for a M54 (E46 330i)?

Dunno, but that is cheap at Costco too!

I think it'd be fine to be honest, check with Opie, and then buy it from Costco

Dave

[sjj84]

mmm-five said:

If you regularly drive the car in a 'spirited' manner then go for the 5W-40, for normal use the 5W-30 will be fine.

Opie are not always (seemingly less & less) the cheapest either. Costco are currently selling LL04 Castol Edge for about £25 for 4L - compared to Opie's £45+delivery. Which is strange considering they're fully synthetic and the increasing price should have no relation to do with the increasing price of crude oil.

Costco have 20% off castrol until the 20th November. Makes Edge 5w30 about £22 including vat for 4 litres. Even without the promotion it's only about £27ish, significantly cheaper than anywhere else.