I recently found an autozone in my area that carries both gc 0w-30 and bc 5w-40. The question I have for the castrol veterans is which would give the best overall performance and protection in a 1.8t? The car has no consumption issues and has almost 100k miles on it. I am just finishing up an ARX rinse and am trying to pick the best synthetic oil for this car. Any advice would be greatly appreciated.
GC or BC in Audi 1.8t?
- Thread starter jtn26
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There are many happy 1.8t owners here on BITOG using GC. I have yet to see a bad UOA from this oil, and not just in a 1.8t engine.
That said, the BC should do OK in this engine as well.
I'm guessing GC will hold up better over longer drain intervals though.
That said, the BC should do OK in this engine as well.
I'm guessing GC will hold up better over longer drain intervals though.
I would think either would be fine, but there are still some questions as to the exact composition of BC, whereas we know GC is 100% PAO.
FWIW, I use GC in my VW 1.8T. As far as BC vs. GC, here's how I see it:
If you are going to drive the car in a VERY HOT climate, or at sustained high speeds (100mph+), go with BC. In all other conditions, I would use GC. That's my $.02
If you are going to drive the car in a VERY HOT climate, or at sustained high speeds (100mph+), go with BC. In all other conditions, I would use GC. That's my $.02
It is a big unknown. I would almost like to see a full workup on BC like was done on GC. I have not seen enough or know enough about UOA and VOA to really know. Others here might. It would be nice though since GC seems to be getting harder to get.
jtn,
I at first thought that, but I now believe it to be full synthetic. My recommendation for a 5K OCI with BC is not based on the premise of it being a Grp III but on the conditions stated by w2, that being hot temps, high speed (it doesn't have to be 100mph+ to qualify as high speed
[ May 07, 2005, 12:46 PM: Message edited by: pscholte ]
The link kindly provided by Tharoka in
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=51;t=000226
helped to find out that Castrol TXT Softec 5W-40 (most probably BC) is Gr.III oil:
http://129.35.64.91/bpglis/lsdsfrf.nsf/0/E3A7271682C9A67880256DFA00513C0E/$file/009964.pdf
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=51;t=000226
helped to find out that Castrol TXT Softec 5W-40 (most probably BC) is Gr.III oil:
http://129.35.64.91/bpglis/lsdsfrf.nsf/0/E3A7271682C9A67880256DFA00513C0E/$file/009964.pdf
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