I have been using Lucas Oil Additive in my Protege for like the last month and it seems to be doing a great Job. My piston rings are pretty much shot(my fault) and the car would always smoke blue smoke, when starting from a cold start. But after putting the Lucas in for 2 consecutive oil changed it has managed to keep the start-up smoking at bay. I also use this in the 323 when I changed the oil last weekend and it runs pretty smooth also. Ofcourse I use regular oil being as when I used synthetic I did not not have good results with the Z5 in the Protege, Constant oil leaks....

I don't use the whole bottle just a portion of it .. I just squeeze some of it in the engine and then add the rest of the oil.. I have been using the same 1 bottle for like 6 oil changes lol...

When I drop the tranny oil out of the 323, I want to get some tranny lucas and put in it also....

Bruce