N53 oil (mileage dependent)

Hxm99 · 02-06-2021, 03:20 PM

Hello all
I've searched quite a bit for this, but didn't really fine what I'm looking for. As far as i am aware BMW recommends 5w-30 Castrol edge, however I have heard from many people, using 5w-40 after a 100k is quite a bit better compared to 5w-30. Is this true? also, I've heard shell helix being a better oil than Castrol edge, is this true?

PS- anyone got anything on Castrol magnatec( fully synthetic)?

thank you in advance

Phil325i · 02-07-2021, 04:57 AM

With a question like this you'll get as many opinions as there are brands of oil! Any good quality, fully synthetic oil that complies with BMW LL04 standard will be fine. Car manufacturer brand recommendations mean very little as they're a marketing deal. BMW stopped recommending Castrol several years ago and now recommend Shell I believe.

Silver Streek · 02-07-2021, 05:04 AM

As above, stick to LL04 and you should be fine. I use Fusch oil, as it's good quality and a good price. I've used 5w-40 but didn't really see any difference to be honest my car's coming up to 90k miles now (325d). If you engines a little more worn in you may see the benefit as less oil loss between services.

Basically 5w-40 is better at retaining its viscosity at higher temps. This explains it well:

https://www.total.co.uk/difference-b...w40-engine-oil

02-06-2021, 03:20 PM	#1
Hxm99 Private First Class 4 Rep 106 Posts Drives: BMW 325i E93 Join Date: Jan 2021 Location: Slough iTrader: (0) Garage List [0.00] 2015 4 series conve ... [0.00]	N53 oil (mileage dependent) Hello all I've searched quite a bit for this, but didn't really fine what I'm looking for. As far as i am aware BMW recommends 5w-30 Castrol edge, however I have heard from many people, using 5w-40 after a 100k is quite a bit better compared to 5w-30. Is this true? also, I've heard shell helix being a better oil than Castrol edge, is this true? PS- anyone got anything on Castrol magnatec( fully synthetic)? thank you in advance
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02-07-2021, 04:57 AM	#2
Phil325i Brigadier General 639 Rep 3,213 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	With a question like this you'll get as many opinions as there are brands of oil! Any good quality, fully synthetic oil that complies with BMW LL04 standard will be fine. Car manufacturer brand recommendations mean very little as they're a marketing deal. BMW stopped recommending Castrol several years ago and now recommend Shell I believe. __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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02-07-2021, 05:04 AM	#3
Silver Streek Captain 139 Rep 628 Posts Drives: 325d E91 Join Date: Feb 2018 Location: The Moon iTrader: (0)	As above, stick to LL04 and you should be fine. I use Fusch oil, as it's good quality and a good price. I've used 5w-40 but didn't really see any difference to be honest my car's coming up to 90k miles now (325d). If you engines a little more worn in you may see the benefit as less oil loss between services. Basically 5w-40 is better at retaining its viscosity at higher temps. This explains it well: https://www.total.co.uk/difference-b...w40-engine-oil Last edited by Silver Streek; 02-07-2021 at 05:10 AM..
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