Oil change

[SimonS4MTM]

Now can anyone tell me any easy way to reset the service indicator for another year?

I thought you had to use VAG-COM?

No, it tells you how to do it in the owners manual

[TWH]

Cheers Dippy, will be having a go next weekend, probalby with Mobil rather than castrol just because I still have 3 litres of Mobil left so might as well just get some extra - unless others know of similar stories about mobil not being as good?

[toasty]

Be careful using old or left over oil, apparently synthetic oil is hydroscopic and so absorbs water over time.

[TWH]

Ah, ok I've had this can for about a year so maybe time to get some new stuff. Ta.

[scillyisles]

Be careful using old or left over oil, apparently synthetic oil is hydroscopic and so absorbs water over time.

All oil is hygroscopic to a certain extent whether synthetic or not. Castrol R in particular is hygroscopic. Of the synthetic oils, the ones that seem to absorb water the most are the polyglycol ones - I don't think Mobil 1 or Shell Helix use polyglycols in their formulation.

[lengster1]

I know brake fluid does this over time,which aint good, but never heard of it before with engine oil,im sure you would be fine if they are un-opened 1ltr bottles.

[Dippy]

I only did O-level chemistry (for those who remember what O-levels were ), so I'm not sure I understand this, but whereas water in brake oil is obviously a problem, surely water in engine oil will be expelled fairly soon once the engine heats up?

[Jan]

Newest Generation of Mobil 1 Supersyn (i.e. 0w-40 or 5w-50) is BY FAR the best oil money can buy. Use 0w-40 (503.01) for standart RS4, and 5w-50 for chipped/tuned cars. Castrol SLX 0w-30, which is very near to a 0w-40 in fact, is good too, but not as good as Mobil 1.

[Jan]

Be careful using old or left over oil, apparently synthetic oil is hydroscopic and so absorbs water over time.

Not right, you can use oil approx. 3-5 years, when stored dark and cool.