So just recently my 89 2.5 t2 lebaron gtc started feeling like im driving a metro... When i put my foot to the floor she doesnt pull like she used to, i could snap peoples heads back before and now i cant even spin my tires in 2nd... im worried it may be my headgasket or something... What things could cause sudden drastic loss in acceleration power??? My vacuum is the same as before, 17 at idle. I just recently switched to Synthetic Mobil 1... It has been about 500km since oil change im running 5w30 same as i was with my regular oil. It does burn oil but not on startup. Thanks, Kyle.