Which oil spec?

[mattylondon]

I would say no. But the full answer really depends on how hard you drive your V10 Marcin. Are you frequently hitting the rev limiter? Using the paddles to keep the engine above 5k rpm? Track time?

The R8 GT is probably expected to be driven hard and the odd track use resulting in a higher engine temp and thus an oil which has a specific viscosity at that engine temp. Also, is this a dry sump V10 like the Lamborghini?

Connect up VCDS and log the oil temp and RPM so we'll know the peak and usual temp with your driving style. With this we can see if 10w60 is for you.

The correct viscosity should be used for the working temp of the engine.

The downsides of the thicker 10w60 is greater friction when cold resulting in a loss of power to the wheels, also slight localisation of heat spots as the oil is thicker and slower to move.

[MikkiJayne]

Quantum is made for VAG UK by BP, who own Castrol

This is a label from a drum of Platinum 5W40:



I put Longlife III 5W30 in everything except the old TDIs which get Synta 10W40.

[Conquistador]

Quantum III 5w30 for me as well. Bought 2 x 5 litre containers of it ages ago and just take them empty to a local VAG specialist for them to fill up cheap from a drum of it whenever I change my oil. To be fair, it's usually cheap enough on ebay - around £45 for 10 litres delivered.

Mikki, think I had Castrol GTX 5w40 in my Lupo (1.7 SDI).

[M-A8]

Hmm..OK

Just looked at the spec of Castrol Edge Supercar 10w60 and it's definitely no good.

Could someone confirm if Castrol Edge Sport 10w60 is suitable please?
Spec says: ACEA A3/B3, A3/B4
Manual says: In exceptional circumstances, if the engine oil level is too low and you cannot obtain oil specification for your vehicle, you can put in a small quantity of oil conforming to the specification ACEA A2 or ACEA A3.

Is ACEA A3 same as ACEA A3/B3 ??


https://msdspds.castrol.com/bpglis/F...RAE-9J2FVL.pdf

I use paddles quiet often and I like the red line, not all the time of course, but quiet often 4000-5000rpm at least.
Other timesn I do drive in Sport (auto) where gear changes are around 3500-4000rpm
All the other occasions, fairly rare, in D (auto) where gear changes are below 3000rpm.


If Castrol Edge Sport isn't the best call as Matt said, then I'll be getting 22 litres of Castrol Edge 5W50 LL spec and do the following:

1. Can of Wynns engine flush - 10min idle & 10min 2000rpm
2. Drain oil and fit cheap oil filter (if such a filter exists)
3. Pour approx. 10l of fresh Castrol oil
4. Can of Wynns engine flush - 10min idle & 10min 2000rpm
5. Drain oil, fit genuine oil filter and new sum plug with new washer
6. Pour approx. 10l of fresh Castrol oil.
DONE

I know it is a ''bit'' an@l, but if this is the 1st time where I'm doing the service not Audi garage, then I want it done properly, flush it properly and get all the old oil out hence 2 fill ups and flushes.

If anyone sees anything very wrong with this process the please do say so

[mattylondon]

Looking at the typical characteristic for viscosity (mm.sq/s) for each Castrol Edge oil weight, it is as so

Temp         5w30   5w40   5w50   10w60
 40C         66     75     109    163
100C         11     13     17     23

There are differences when the engine/oil is warm. I would still use VCDS and get two references for your current oil temp (I guess it's 5w30). Mrs Daisy v's Mr Marcin. Then we can see how hard your oil is working before making changes to oil weight.

[M-A8]

OK, I can see your point buddy
Is this is the data I can pull off the ECU now, or VCDS needs to be plugged in each time I go for the ride??

Slowly leaning more now towards 5w30

Thank you Matt, much appreciated

[mattylondon]

You'll have to log live data while driving mate.

[paulrstaylor]

Originally Posted by M-A8

1. Can of Wynns engine flush - 10min idle & 10min 2000rpm
2. Drain oil and fit cheap oil filter (if such a filter exists)
3. Pour approx. 10l of fresh Castrol oil
4. Can of Wynns engine flush - 10min idle & 10min 2000rpm
5. Drain oil, fit genuine oil filter and new sum plug with new washer
6. Pour approx. 10l of fresh Castrol oil.

Why not drive it for a week or two between steps 3 and 4?

[snapdragon]

7-8 years ago, dealers were paying 80p a litre for bulk Castrol LLIII.
They sold it in parts dept for £55 for 4 litres.
Same product - many markets.

[M-A8]

Originally Posted by paulrstaylor

Why not drive it for a week or two between steps 3 and 4?

Sounds like a good idea, but I would prefer to have it done in one day - got plenty to get on with around the car.

Apparently there could be between 1-2litres of old oil left in the pipeline and various components after draining, so my idea is to fill it up with fresh oil to flush it all out before draining it again and refilling with fresh oil.

Makes sense ??