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Re: Redline MTL in Audi 4000 transmission?
I am using MT90 in the tranny on the ur-Q (with the GL5 75W90 in
the rear diff). I recommend Redline over Castrol. The owner's
manual for my car specifies requirements that are satisfied only
by MT90, and that is what Redline recommended that I use as well.
Since you don't need to replace the tranny fluid that often, the
price difference shouldn't be a real big deal. I hadn't noticed
a $3 difference though. It could take a long time to learn that
using the lighter MTL caused a problem. What are your local prices
for the different weights? My recollection is that the MT-90 was
$6.50-$7.00 per quart here in San Jose, CA.