Yeah don't use synthetic (found that out the hard way) Sounds like a synchro if ti is only the 1-2 shift. Only other thing I can think of the stock master cylinder (clutch not brakes) has a flow restrictor in it and sometimes that can foul up shifting. You can go here (
http://www.installuniversity.com/ins...sity/index.htm) for instructions on how to do the drill mod. It is free so it may be worth a shot. Without actually driving the car I can't tell you more on what the problem is.