I don't have any experience with the 4.6, but on the 5.0, if they haven't been changed, you'll need a new timing chain, O2 sensors, cats. That's just normal stuff.

I'm a Chevy person at heart, but Ford overbuilds their stuff, where GM puts marginal stuff on their cars. How many Camaro's (since 1973) can run 11's with a stock rear? I rest my case.

 

the only thing that needs to be replaced on a 5.0 to run 11s as far as rear goes are the axles. the rest can hold up, you underestimate ford rearends. dont get me started on ford 9" i rest my case.

 

155k on mine and head gasket went, but it was ran really hard by the guy i bought it from rebuilt it and ran great.

 

mobil 1? i put in amsoil this weekend and i love it! u should try it !

 

are you trying to get sponsorship from amsoil??????sheeesh let it rest it's good,but it's only as good as treat your car.

 

lol

 

Yah, I've been using Mobil 1, been working pretty damn good for me. No complaints so far. (maybe except for the price...)

 

I have 117,000 on my engine, and have only done a few oil changes since I have had the car, I dont know if the guy used synthetic or not, so I decided to get some Castrol 10w30.. Should I go to a Mobil 1 10w40 super syn, or keep the Castrol?? I want to try a synthetic, what do you think?

 

I don't know, synthetic costs a lot more, it's up to you I guess. Castrol is supposed to be pretty good oil.