hi, today I compounded 25 soybean oil + 25 oak wood, the result was 25 straw mushroom
before that, I also tried 25 soybean oil + 25 cantaloupe, result was 25 steamed buns..
what's wrong? weeks ago I compounded oil with mucks and I get tars, naphthas, and heavy oils, without failing even once >.<

angel...dont waste such a good materials..
for naphtha and other stuff...
u may use
Soybean Oil + Tin ore = Naphtha/Heavy Oil
Soybean Oil + Coal Ore = Tar...

u may get other results..
but all is OIL type...
dun use JUNIOR alchemy to compound...
and dun use more than 1 amount of item..
use only 1 + 1 ...
dun like 25 + 25..
its a waste of material :(

i've always recycled vegetable oil like coconut oil, soybean oil, and sesame oil to get heavy oil, tar, napatha, and crude oil with no problems. worst case you get crude oil.

but this is still weird, I used to get so many Naphthas and Heavy oil without failing even once with the same method.. even with organic mucks. never got mushroom or steamed buns before..
and yes I use primary alchemy.
I'll try again later and post some screenshot ^^

yeah, use muck then, or coal ores and tin ores nice too ....
well, today... I am positive I compound apple seeds + original rubber with primary ... and it become a stack of bowling. lol

well, I just did a small test and found out that oil + muck won't fail (at least for 14 times)

but somehow with oak woods fails a lot (got 8 straw mushrooms out of 16 attempts)
also fails with watermelon (failure result: steamed buns)

so now I learn that different secondary material affects the failure rate, even it's just for catalyst.

screenshot: http://wlodb.com/files/compoundresult.gif

(red = result of 16 oil + oak woods, blue = 14 oil + organic mucks)