Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.

Oil change interval

Discuss anything non Z4 related here
User avatar
pvr
Legend
Legend
Posts: 26215
Joined: Fri Jun 15, 2007 12:27 pm
Location: South East UK

Oil change interval

Post by pvr » Sat Mar 02, 2024 2:07 pm

Was reading an article about engine oil where the conclusion was that oil doesn’t deteriorate by time and only by miles.

Thought that was interesting as I always thought that the annual change of oil on the Golf that might do 300 miles or so, could be excessive so might as well skip every other year.

Will see if I can locate the article
Current:
911-50 Black - unique spec
X5M - 575 hp of fun in a V8
Abarth 595 Comp.
Golf Clipper - collectors item
Z4 3.0si Black Sapphire
VW ID.3

Previous:
Z4M Silver Grey - non flimper spec (gone to Bing)
Z4 3.0 Toledo

User avatar
Mr Tidy
Legend
Legend
Posts: 23778
Joined: Wed Jul 02, 2014 12:18 pm
Location: North West Surrey

Oil change interval

Post by Mr Tidy » Sat Mar 02, 2024 8:09 pm

I'd like to see that article.

When I was still doing business mileage my BMWs always needed an oil change based on mileage, but now I've stopped working they get done on time so every 2 years which seems to be around 6/7 thousand miles. Any more frequent than that just struck me as overkill so it would be good to see if I may be right!
Coupes because stunning!
Current - Silver Grey MC, Imola Red heated Nappa & carbon trim. Aeros, H & R Coil-overs, 224s, OE Strut brace, Nav, cup-holders, DSP Hi-Fi, pdc, cruise, MFSW, no CDV! E90 330i daily
Gone - Montego Blue
Gone - Ruby Black

User avatar
Nanu
Lifer
Lifer
Posts: 3925
Joined: Mon Dec 03, 2012 4:47 pm
Location: Sunderland

Oil change interval

Post by Nanu » Sat Mar 02, 2024 9:37 pm

Surely if oil deteriorated over time, each can of oil would have a sell by date. Also if you purchased it towards the end of that date, would that mean an even earlier oil service once you put an oil that's already say 6 months old into your car?

Car booked in for its second service which includes an oil service and plugs, on Thursday with 18K on the clock so will ask.
G29 M30i M Sport San Francisco Red

Previous
E89 35is Valencia Orange
E89 28i Crimson
E89 25i White

User avatar
pvr
Legend
Legend
Posts: 26215
Joined: Fri Jun 15, 2007 12:27 pm
Location: South East UK

Oil change interval

Post by pvr » Sat Mar 02, 2024 10:38 pm

Haven’t found it yet, will check my desktop machine history Monday.

It was showing that an analysis of a 14 year old open oil bottle that nothing had deteriorated.
Current:
911-50 Black - unique spec
X5M - 575 hp of fun in a V8
Abarth 595 Comp.
Golf Clipper - collectors item
Z4 3.0si Black Sapphire
VW ID.3

Previous:
Z4M Silver Grey - non flimper spec (gone to Bing)
Z4 3.0 Toledo

User avatar
Mr Tidy
Legend
Legend
Posts: 23778
Joined: Wed Jul 02, 2014 12:18 pm
Location: North West Surrey

Oil change interval

Post by Mr Tidy » Sat Mar 02, 2024 10:44 pm

I can see why old fashioned mineral oils might deteriorate over time, but modern oils are synthetic based so I'd hope they wouldn't.
Coupes because stunning!
Current - Silver Grey MC, Imola Red heated Nappa & carbon trim. Aeros, H & R Coil-overs, 224s, OE Strut brace, Nav, cup-holders, DSP Hi-Fi, pdc, cruise, MFSW, no CDV! E90 330i daily
Gone - Montego Blue
Gone - Ruby Black

Pondrew
Lifer
Lifer
Posts: 8437
Joined: Wed Jan 20, 2021 7:20 pm
Location: Spaldingski

Oil change interval

Post by Pondrew » Sat Mar 02, 2024 10:49 pm

pvr wrote: Sat Mar 02, 2024 10:38 pm It was showing that an analysis of a 14 year old open oil bottle that nothing had deteriorated.
A bit different to it sitting in a sealed metal 'box' though. :?
All good things come to those who wait. I'm really impatient which explains a lot.

F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!

Pondrew
Lifer
Lifer
Posts: 8437
Joined: Wed Jan 20, 2021 7:20 pm
Location: Spaldingski

Oil change interval

Post by Pondrew » Sat Mar 02, 2024 10:50 pm

Mr Tidy wrote: Sat Mar 02, 2024 10:44 pm I can see why old fashioned mineral oils might deteriorate over time
It took millions of years to form, so don't see why TBH. :wink:
All good things come to those who wait. I'm really impatient which explains a lot.

F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!

User avatar
TitanTim
Lifer
Lifer
Posts: 8055
Joined: Sun Feb 12, 2012 11:21 pm

Oil change interval

Post by TitanTim » Sun Mar 03, 2024 12:00 am

Always had the BMWs serviced every two years regardless.

Don't BMW say their gearboxes are sealed for life but if you've seen the state of the oil at 60k miles it's not a pretty sight.

Tim.
Image

User avatar
buzyg
Legend
Legend
Posts: 26507
Joined: Fri May 20, 2011 6:11 pm
Location: Cornwall

Oil change interval

Post by buzyg » Sun Mar 03, 2024 1:22 am

Interesting thread. Hope you can find the article to share.
Image


User avatar
pvr
Legend
Legend
Posts: 26215
Joined: Fri Jun 15, 2007 12:27 pm
Location: South East UK

Oil change interval

Post by pvr » Sun Mar 03, 2024 9:20 am

Yep, thanks Ray - that was the one
Current:
911-50 Black - unique spec
X5M - 575 hp of fun in a V8
Abarth 595 Comp.
Golf Clipper - collectors item
Z4 3.0si Black Sapphire
VW ID.3

Previous:
Z4M Silver Grey - non flimper spec (gone to Bing)
Z4 3.0 Toledo

User avatar
enuff_zed
Lifer
Lifer
Posts: 14653
Joined: Wed Oct 26, 2016 11:05 am
Location: Attleborough, Norfolk

Oil change interval

Post by enuff_zed » Sun Mar 03, 2024 9:36 am

But if it goes into your car and does a bit of work it then sits in the sump and oil ways potentially holding foreign matter and moisture in it.
Not quite the same as leaving the top off a bottle.
HQ of 'Norfolk Zed Rescue'.
Always happy to help if I can.

If the forum helped you, why not help the forum back. Thats the Z4 way! :thumbsup:
Image

User avatar
pvr
Legend
Legend
Posts: 26215
Joined: Fri Jun 15, 2007 12:27 pm
Location: South East UK

Oil change interval

Post by pvr » Sun Mar 03, 2024 9:46 am

But isn’t that the case with the 993 example where it hadn’t deteriorated ?
Current:
911-50 Black - unique spec
X5M - 575 hp of fun in a V8
Abarth 595 Comp.
Golf Clipper - collectors item
Z4 3.0si Black Sapphire
VW ID.3

Previous:
Z4M Silver Grey - non flimper spec (gone to Bing)
Z4 3.0 Toledo

User avatar
enuff_zed
Lifer
Lifer
Posts: 14653
Joined: Wed Oct 26, 2016 11:05 am
Location: Attleborough, Norfolk

Oil change interval

Post by enuff_zed » Sun Mar 03, 2024 10:02 am

pvr wrote: Sun Mar 03, 2024 9:46 am But isn’t that the case with the 993 example where it hadn’t deteriorated ?
Yup.
But I was meaning that the oil may stay the same but what is it holding within it?
HQ of 'Norfolk Zed Rescue'.
Always happy to help if I can.

If the forum helped you, why not help the forum back. Thats the Z4 way! :thumbsup:
Image

User avatar
pvr
Legend
Legend
Posts: 26215
Joined: Fri Jun 15, 2007 12:27 pm
Location: South East UK

Oil change interval

Post by pvr » Sun Mar 03, 2024 10:08 am

Which comes back to how many miles it has done with the oil, the more miles the more pollution
Current:
911-50 Black - unique spec
X5M - 575 hp of fun in a V8
Abarth 595 Comp.
Golf Clipper - collectors item
Z4 3.0si Black Sapphire
VW ID.3

Previous:
Z4M Silver Grey - non flimper spec (gone to Bing)
Z4 3.0 Toledo

Post Reply