86 5.0L

10w40 here becuase of the scorching summers

OneFine89Mustang

i have been using valvoline race oil 20w50

Gronk72

Mobile1 10w40 full synthetic with a Motorcraft Filter.

Twisted

He's joking about using straight Lucas additive...I hope.

Stang562

10w30 mobil1 or Royal purple... theres an oil i seen for mobil1, synthetic 0w30... anyone tried it yet?

1992lx5.0

i use 20w50 all the time year long....even tho it sits from oct to april 21st every year

MarkNieb

I've had no issues running straight Lucus. It actually made the whole engine alot quieter and runs alot smoother. The guys at Autozone recommended it. Working great for me.

natbel08

arnt you the same guy that started your car with a waterhose in it to makesure all the oil was cleaned out?

and i usually use mobil 1 10w30

93_five_oh

shhhh...! stop while you're behind! [sm=headbang.gif]

i run mobil1 fully synthetic 5W-20. good stuff

OneFine89, you do realize that racing oil is called racing oil for a reason, right? i'm pretty sure i've read that it's not meant to use for everyday driving conditions...

Mustangkiler

I was hoping you meant the lucas oil, but ya dont listen to everyone at autozone, i used to work there and a few know theres tuff but whoever told you to use straight additive is wrong. 10 30 is whats recomended for all the 5.0's. I use 10 30 castrol syntec, Unlock The Power B*tch