Try getting lightweight rims. CSL's are about 3 to 4 pounds heavier than the M68 which is what your car came with. Unless you're in it for looks by all means get CSL's. For performance, accel, and gas mileage stick with M68's or extremely lightweight 17's wheels. 19 pounds and lower.
<-- Mango *F-BOMBS IN SIGS*
Bilstein HD's | E30 M3 FCAB's | H&R OE Sports | F+R strut bars | Self tuned 027 93 octane chip | KoseiK1's on R888's | + crazy OCD maintenance