Avant XP

Audi's current oil grade and quality recommendations for my 2003 A4 1.8T (Avant) are SAE 0W-30, SAE 5W-30, or SAE 5W-40, VW 502 00, and ACEA A3.

I'm in Sacramento, California, where the weather in the summer is from 60 F to 110+ F, and the winter is 30 F to 70 F. The mountains are close by, so for ski trips, the weather can be probably 15 F to 50+ F.

My driving consists of about 85% city, 15% highway.

With that all in mind, is the 5W-30 or 5W-40 grade the right grade to use for year-round use, or would some of the other grades (15W-50 for example) be more appropriate? (Synthetic, of course) Or, would it be preferable to run different grades per season?

Dave Griswold

Mobil 1 0w-40. Pretty much year round. I've used 15w-50 and 0w-30 as well.

Avant XP

Even tho 0W-40 is not a recommended grade on the B6? Was it recommended for the B5 1.8T?

Dave Griswold

were using it as replacement fill on the 00's and 01's.

If you're uncomfortable, just grab some mobil 1 5w or 10w-30.

Frankly, I'm trying Castrol Full Synthetic 10w-40 this weekend.