afaik a 2.8 vr6 holds 6 litres of oil im fairly sure of that im also 100% sure min to max on dipstick is 1 litre so if its right on minimum uv got 5 litres left etc etc
i cant help u much BUT bhp does sod all to stress the transmision TORQUE IS THE ACTUAL FORCE INVOLVED a stage 1 supercharger gives somewhere around 250 lb ft afaik hope this helps mate
u mean water temp never went over 90? hehe if it didnt go above that i wouldnt worry about the head being cooked at all and 104 degree oil temp is the top end of normal aswell