Oil - which one ?

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TJS
Joined: Mon 12 Sep, 2005 20:05
Posts: 374

  Z1 roadster
Location: Bucks.

Oil - which one ?

Post by TJS » Thu 10 Jul, 2014 21:43

I was checking the oil SAE viscosity grade in the owners manual (p.34) which highlighted a range of oils depending on outside operating range with thinner viscosity the colder the temperature.

SAE 20W-50 between -10c and 50c

SAE 15W-50 between -20c and 40c

SAE15W-40 between -20c and 30c

So what brand / viscosity are you using in your Z1 ? The Opie oils site recommends synthetic 5W-40 for the Z1.

I am currently using Mobil Super 2000 10W-40 semi-synthetic in both the Z1 and the TVR. The Z1 uses no oil while the TVR settles at 75% showing on the dipstick range, top it up and 100 miles later its back to 75% where it will happily stay.

TJS

Cooper01
Joined: Tue 29 Apr, 2014 09:06
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  Z3 roadster 3.0i

Re: Oil - which one ?

Post by Cooper01 » Fri 11 Jul, 2014 03:51

I believe 5W40 full synthetic is recommended however I would not be surprised if you get a variety of answers. Changing the oil on a regular basis to avoid sludge build up is best and you can use a mineral oil on a temp basis to use as a cleaning agent. Be sure to change the 2 small 0 rings in the oil filter area. Drain oil when warm and don't over tighten the drain plug. Have fun.

felix
Joined: Sat 02 Jul, 2005 17:25
Posts: 529

  Z1 roadster

Re: Oil - which one ?

Post by felix » Fri 11 Jul, 2014 21:13

Cooper01 wrote:I believe 5W40 full synthetic is recommended however I would not be surprised if you get a variety of answers. Changing the oil on a regular basis to avoid sludge build up is best and you can use a mineral oil on a temp basis to use as a cleaning agent. Be sure to change the 2 small 0 rings in the oil filter area. Drain oil when warm and don't over tighten the drain plug. Have fun.
I'm guessing your reply is directed towards the Z3? The Z1 doesn't have the 2 rubber O rings as it uses a spin-on filter - see http://bmwfans.info/parts-catalog/Z1/Eu ... il_filter/

Cooper01
Joined: Tue 29 Apr, 2014 09:06
Posts: 152

  Z3 roadster 3.0i

Re: Oil - which one ?

Post by Cooper01 » Sat 12 Jul, 2014 11:50

Sorry felix i should put on my glasses before replying to threads. Lol. I missed the z1 part.

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Jet
Joined: Fri 14 Nov, 2003 16:24
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Re: Oil - which one ?

Post by Jet » Fri 18 Jul, 2014 14:21

Hey TJ,

it is covered here in detail

http://www.zroadster.net/forum/viewtopi ... it=shc+oil

JB

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Boysie
Joined: Sat 23 Apr, 2005 15:24
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  M roadster S50
Location: Wallington Surrey
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Re: Oil - which one ?

Post by Boysie » Fri 18 Jul, 2014 16:06

Fuchs full synthetic from Opie oils and you get a oil filter 'with a O ring as well'
Ray

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TJS
Joined: Mon 12 Sep, 2005 20:05
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  Z1 roadster
Location: Bucks.

Re: Oil - which one ?

Post by TJS » Sun 20 Jul, 2014 14:01

Hi J

I was thinking about engine oils rather than the gearbox, especially the modern thin synthetic oils for an engine designed 30 plus years ago. I am not too concerned with high mileage, longevity between oil changes given the low annual mileage, in fact the the car has averaged 1500 miles between services over 24k miles.
Regards

TJS

sfh3l
Joined: Fri 02 Sep, 2005 17:07
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  Z1 roadster
Location: Buckingham

Re: Oil - which one ?

Post by sfh3l » Mon 21 Jul, 2014 08:16

TJS,

I use Fuchs/Silkolene (depending on which day of the week it is and which brand they are pushing it seems) Pro S 5W40 in both the Z1 and the (older) CSL on Opie Oils' recommendation. I think it is a lovely oil and though the Z1 shows no particular preferences, the CSL definitely runs better with that oil than with any of my previous experiments (Castrol RS and Mobil 1 mainly).

The Pro R is a fully synthetic esther-based oil and I can't recommend it highly enough.
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