hello to the diesel lords,

just had my oil changed, i do it every 3-4 months, but this time i 've added 1 can of stp diesel oil treatment to 8 liters of castrol crd multigrade oil that i regularly use, what i've noticed is that i've lost some "pull" even though i'm already in second gear, i'm also suspecting a sticking parking brakes, rear or front b'coz sometimes i hear a "thud" when i step on the brakes any help will do guys b'coz a someone mentioned in this forum "my ride is getting dangerously slow"

thanks,

joseph c.
April 1984'300TDT