I have been using 1191 NAPA gold oil filter for long time. Meets bypass specs, etc. for 2.8 30V AHA
02-07-2009, 08:06 AM
#11
LOL. Your assumptions are correct - most of them anyway.
I buy NAPA oil, but generally buy Mann filters in bulk. If I'm short, I'll do a NAPA filter, and the non-VAG stuff gets NAPA filters.
02-07-2009, 09:54 AM
#13
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I must be the 2nd person in here that dont see any tangables
<center><img src="http://pictureposter.audiworld.com/13510/mvc-007s.2.jpg"></center><p>I'll stick with the regular oil sized filters and 3000miles syn oil changes. Have done two valve cover gaskets, and my valve train looks spotless......
02-07-2009, 10:31 AM
#15
yes. 25-33 is what I've read here. it's why I wouldn't use the M1 filter that has low bypass. Read:
<ul><li><a href="https://forums.audiworld.com/a4/msgs/2845906.phtml">follow the links within the posts</a></li></ul>
02-07-2009, 11:05 AM
#16
I don't even like the up-sized filer on 1.8t in all cases...
Taking longer to warm the oil could present more harm than the good of extra capacity in a short-tripper, if changed on-time.
02-07-2009, 11:08 AM
#17
There is actually a mid-sized filter too, a shorty fat one. My BOSCH #3500 imploded, fwiw...
I'll post some pics later, but yeah. I know of the mid-sized from leafing through the BOSCH filer apps at AutoZone. It's short, like 5"x 5".
Figure any Audi filter works on any Audi anyway...threads and BPV are the same, forget about 30 vs 30 psi. Engines filters bypass not just from being clogged media, but from overpressure from thick cold oil. See my other posts in the thread.
Figure any Audi filter works on any Audi anyway...threads and BPV are the same, forget about 30 vs 30 psi. Engines filters bypass not just from being clogged media, but from overpressure from thick cold oil. See my other posts in the thread.
02-07-2009, 11:14 AM
#19
My thinking is that lower bypass will provide much better flow. Flow cools bearing journals, etc.
Could be a decent race mod, srsly. The Motorcraft FL-1s or 820s is super-good w/speced silicone adbv.
02-07-2009, 11:26 AM
#20
Thinner oil on start is always better.If+1/2q can prevent sludge on the hot end, why not minus 1/2q?
All oil is super-thick at ambient compared to OP temp.
yes, I do believe oil temp differences vary in a NON-Linear fashion compared to volume carrying a thermal load.
Can it make sludge if it does not warm up a few percent? Well...can it prevent sludge if it's bigger and not excessively warm? I think it's the exact thermaldynamic question in reverse and afaik, some Audi engineers say there is a difference.
Am I specualting, yeah. When I am going into theory vs practice and observation, I'll say so and this is theory.
yes, I do believe oil temp differences vary in a NON-Linear fashion compared to volume carrying a thermal load.
Can it make sludge if it does not warm up a few percent? Well...can it prevent sludge if it's bigger and not excessively warm? I think it's the exact thermaldynamic question in reverse and afaik, some Audi engineers say there is a difference.
Am I specualting, yeah. When I am going into theory vs practice and observation, I'll say so and this is theory.