Mechanic just filled me with 10W40 Nulon

[IGO300]

Is this a problem?

I told him it needed 5W40 but he kept insisting this was a better option.

Do I need to replace it?

Any thougths on Liquid Moly? I've heard it's good for helping to seal gaps and reduce smoke.

B5 RS4 with 58,000 miles

[dace]

IMO, I would replace it with Synta Gold 5W40.

[grizz]

Same here , i use synta Gold 5w40.

[IGO300]

Thanks for that advice lads.

Is it critical to change now or can it wait?

What is the problem with the 10W40 v 5W40

[boxerdogted]

Too thick on cold startup, Ok for hard track use when warmed up gently.
I would change it asap.