5w40 5w30

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MrZ

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Hi all

At my last oil change the oil used was 5w40 vw 502 00. I could do with a small top up and have castrol edge 5w30 which I'm sure I bought for a previous Audi.

Is it OK to mix the 2 grades? Or best to go buy 5w40. The car will be serviced annually.

Thanks

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I also just found an unopened shell helix 0w30 if its better to top up with that

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My dealer used 5W-40 502.00 for the last couple of (annual) services. Penny pinching, I thought, and for various other reasons I won't be going back. It's not a problem topping up with either 0 -30 or 5 -30 decent quality oils. It's what I do.
 
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audi upgrades
I'm not sure it's worth mixing different grades, although either are appropriate. on their own as you say For the £40 is it worth the risk?
 
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Honestly, there are more things to worry about, and spend £40 on, than this. The oil will degrade in use and its viscosity will change more in service between oil changes than using a perfectly acceptable and marginally different grade as a small top up. Your choice.
 
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I thought you were allowed to use up to 1L of near viscosity for occasional top-ups, because as noted above the oil will change in viscosity over time in the engine.

Colin
 
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While we're on the subject of oil, does the sump plug need replacing with every oil change or just a washer/seal?
 
MattDC said:
While we're on the subject of oil, does the sump plug need replacing with every oil change or just a washer/seal?
Click to expand...
The sump plug comes complete with a steel washer that isn’t removable so the official factory line is that it gets replaced each time it is removed.
Many don’t always follow this though and re-use the sump plug, as long as the washer isn’t scored etc.
 
Nessy said:
The sump plug comes complete with a steel washer that isn’t removable so the official factory line is that it gets replaced each time it is removed.
Many don’t always follow this though and re-use the sump plug, as long as the washer isn’t scored etc.
Click to expand...
When my 1.4 petrol was first serviced by the dealer they sold me a new plug and washer, so when I did the second service myself I bought another new plug and washer (was also used to my previous Skoda Octavia TDI where the washer was captive on the bolt, and you were meant to replace both each time). But it turned out that the washer was removable, so I could easily have reused the plug.
I've since read something suggesting that the factory fit one is a captive washer but the replacements are a replaceable washer (for the 1.4 petrol, at least). So now I just buy a new washer each time. That washer is massively overpriced, mind you!
 
AFAIK there’s only 1 sump bolt for the latest models though ISTBC on that, it’s great if you do have a replaceable washer!
When I did the first oil change on my mums 2018 A1 ( this was at 3K miles & 1 yr old) the factory sump plug was painted black ( it matched the sump!) and had the captive washer.
The plug appeared identical to that in use on my 2003 TT and 2006 A3 8P and now my 2018 8V.
My former daily ‘99 A4 B5 had a similar sump plug but with an easily removable copper washer, a much more sensible arrangement IMHO.
Dealers like charging £4-5+ for the sump plugs with captive washers but they’re available from the likes of Febi Bilstein for less than £2 each , I bought a few recently.
I must confess that I don’t always renew the sump plug, as long as the washer surface is unscored and is correctly torqued-up (IIRC it’s 30Nm) then I’ve never had any issues/leaks.
 
Nessy said:
AFAIK there’s only 1 sump bolt for the latest models though ISTBC on that, it’s great if you do have a replaceable washer!
When I did the first oil change on my mums 2018 A1 ( this was at 3K miles & 1 yr old) the factory sump plug was painted black ( it matched the sump!) and had the captive washer.
The plug appeared identical to that in use on my 2003 TT and 2006 A3 8P and now my 2018 8V.
My former daily ‘99 A4 B5 had a similar sump plug but with an easily removable copper washer, a much more sensible arrangement IMHO.
Dealers like charging £4-5+ for the sump plugs with captive washers but they’re available from the likes of Febi Bilstein for less than £2 each , I bought a few recently.
I must confess that I don’t always renew the sump plug, as long as the washer surface is unscored and is correctly torqued-up (IIRC it’s 30Nm) then I’ve never had any issues/leaks.
Click to expand...
And that one plug has a captive washer? Or removeable?
You can get away with reusing, yes, I agree, if it's not been over-torqued. But I can never quite bring myself to!

I can check part numbers for the separate bolt and washer I bought when I get home tonight, if that's helpful? Although it's always possible they've discontinued the separate ones as it would have been 2017 that I bought them, and since then I've just bought washers. Also may be affected by different sumps? Mine's metal, but I think the later versions of my engine have a plastic sump?
 
Nessy said:
AFAIK there’s only 1 sump bolt for the latest models though ISTBC on that, it’s great if you do have a replaceable washer!
Click to expand...
The S3 has a plastic oil sump and a plastic sump plug with an O ring on it
 
I’ve only ever experienced cooking models, never anything fancy enough as an S3 :glee:.
My TT may be quattro but it’s a heavy old barge!
Since the A4 B5 with copper washer I’ve only experienced the steel sump plugs with non-removable washer.
My latest 8V has a steel sump with sump plug with non-removable steel washer.
 
Nessy said:
I’ve only ever experienced cooking models, never anything fancy enough as an S3 :glee:.
My TT may be quattro but it’s a heavy old barge!
Since the A4 B5 with copper washer I’ve only experienced the steel sump plugs with non-removable washer.
My latest 8V has a steel sump with sump plug with non-removable steel washer.
Click to expand...
I kind of wish I knew what mine (2013 1.4 petrol) came with from the factory, but I never got to see that as I got it dealer serviced for its first service. But I know they invoiced for a plug and washer, so I'd assumed it was like my old TDI Octavia with captive non-removable washer. I always assumed that that washer was Al rather than steel, but never tested.
But the replacement I bought for mine (from TPS, so official part for the chassis number) was a steel bolt, and a separate copper washer. From then on I've just bought the washer.
 
Well the VW dealers near me said I need to replace the washer and the plug/bolt as they come "as one item" and with an oil filter that costs £23.20. Since I was passing an Audi today I stopped to ask them and they said you need to replace both the plug and washer but I don't have to buy them with an oil filter, and they had them in stock for £9.78 so I thought sod it and bought them. The washer isn't captive to the sump plug/bolt, so I'm sure I don't need to actually replace that, and it was only after I paid for them I could see, from the paperwork, I can just buy the washer on it's own (£4.47 inc the VAT though!!!). Or £3.50 off eBay if you're brave I know it's probably a waste of money, but I figure for the sake of a tenner I'll just use dealer parts for it. It's only just over £6 difference, not the end of the world - what's that, about enough electricity to microwave some beans?
 
Also, does anyone know the correct torque settings to tighten up the sump bolt with a new washer?
 
MattDC said:
Well the VW dealers near me said I need to replace the washer and the plug/bolt as they come "as one item" and with an oil filter that costs £23.20. Since I was passing an Audi today I stopped to ask them and they said you need to replace both the plug and washer but I don't have to buy them with an oil filter, and they had them in stock for £9.78 so I thought sod it and bought them. The washer isn't captive to the sump plug/bolt, so I'm sure I don't need to actually replace that, and it was only after I paid for them I could see, from the paperwork, I can just buy the washer on it's own (£4.47 inc the VAT though!!!). Or £3.50 off eBay if you're brave I know it's probably a waste of money, but I figure for the sake of a tenner I'll just use dealer parts for it. It's only just over £6 difference, not the end of the world - what's that, about enough electricity to microwave some beans?
Click to expand...
I wonder if their system shows to replace both as the factory fit one is captive, but then the future replacements can just be the washer. On my old TDI Octavia, the drain plug thread was tapped into an aluminium sump so I wondered if they wanted a new plug each time to protect that thread. But the A3 1.4 petrol is just a pressed steel sump, so I can't see any reason it'd need a new plug.

For what it's worth, part numbers for mine for the drain plug and the washer are as in the photo:
IMG 5682
 
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