JimK

Hi,

I want to change the engine oil every 5000 miles. Not sure 5W- 30 or 10W-30 Mobil one Synthetic oil is suitable for my 1999 A6 quattro. Currently it is 39,500 miles. I live in Detroit of Michigan.


Your advice will be appreciated.

TwoTrey

I believe that the top three choices for oil are
- Redline 10W30
- Amsoil 10W30
- Mobil1 0W40 (as well as the grades you mentioned)
Your 1999 A6 is a 2.8 and because it doesnt experience as much stress as the turbo engines you don't need (nor see a great benefit from) the high performance (and more expensive) Redline oil.
I use Mobil1 0W40 and it's provided significant improvement over the Audi oil. The engine runs smoother and quieter. Check Stoney's links for more oil comparison info.

NexxTT

Which oil are you using now? Have you consistently used this brand/weight?

mbr

I like Mobil 1 0W40

AUOOOO

to synthetic oils, and all seems to ignore (not knowing of) NEO (Long Beach in LA). They have made synthetic as long as AMSOIL and provides an excellent series of products.
I drove AMSOIL all for approx 10 years, and changed to NEO (now 12 years) when AMSOIL changed to a lesser quality product. I run their 5-30 viscosity, as they only have 0-5 racing oil which is too low I believe.

http://www.neosyntheticoil.com for product descriptions and dealers.

Stoney

... linked in the FAQ (see link below). I'd use their Series 2000 0W30 very 8 or 10k mi, or their 5W30 (less expensive) every 5k mi.

<A HREF="http://www.netwiz.net/~jds/files/a6_links.html#oil">A6 FAQ, oil section</A>

I'm not familiar with Neo, as pridbor wrote about, but would like to learn more.

AUJ

<ul><li><a href="https://www.audiworld.com/tech/eng9.shtml">https://www.audiworld.com/tech/eng9.shtml</a</li></ul>

QCRAZY

<ul><li><a href="http://neptune.spacebears.com/cars/stories/oil-life.html">http://neptune.spacebears.com/cars/stories/oil-life.html</a</li></ul>

urq20vt

Ditto.

rally

Mobil One 5W-30 every 5K here.