I got my first car about 5 months ago its a 1994 ford explorer auto 4x4 and as far as i know it's bone stock except for the muffler that was said to be replaced since it had holes in it. I have not done much to it I did have to do a front brake job on it since the caliber froze up on me 2 times and the second time killed it and my rotor so i got all new calibers pads and rotors up front and I did change the oil to 10w30 Castrol synthetic with a bosh ( I believe) filter and a transmission oil/filter change with Valvoline high mileage transmission fluid.