Hi,
jus my 2 cents, maybe you got 1-2 inches smaller with those wheels an tires. my 97,5-speed se all stock turns 2900 @ 70. my girlfriends lx auto turns 2800 @ 70 with all stock 14" wheels. the best GM my se ever got was 32 coming out of Florida. worst is 26 around town with ac on. maybe i just 'baby' em.
johnny