GhostRider02GT

If your filler neck is on the driver side, its 5 qts, if its on the passenger side its 6.25 qts. I use RP, I have seen numerous tests with it over other oils....

2000GT4.6

Any full synthetic name brand oil will work... except castrol. Only old people use castrol.

I don't see why you couldn't go back to dino oil if you wanted to after using synthetic, I think thats mostly an old wives tale, but why would you want to. Synthetic > conventional in every single way.

35thAnni99GT

Valvoline Synpower 5w30 with a Motorcraft filter. If it never got cold here I would just run straight 30 weight.I've seen graphs and oil wear analysis charts from over at bobistheoilguy forums showing that at temp. extremes SAE30oil prevents oil much better than oil with viscosity improvers (multi-weight oils).

35thAnni99GT

Uh.. where did you get this from? I know my filler neck is on the driver side and at 6 quarts I'm still not at the top line.

6mustang6

my Gt's filler neck is on the passenger side, and my car takes 5 quarts. That Theory is not correct.

bigtinybob

i use motorcraft syn,10bucks a gallonwith motorcraft filter,car sounds smooth as ever

rthouck

Royal Purple - try it once you'll never go back!

undecided.steve

I have seen a study like that as well but for the life of me I cannot locate it.
It was something like "increase your MPG 0.5 percent and your wear 300 percent or something like that. I am making up those numbers but
it was along those lines.

What I *do know* is that 5w-20 was done to meet CAFE standards, IOW up the MPG on the car.
There is truth that the tolerences in these motors are very tight and that you shouldn't put a higher than 5w-30 oil in the car.

Think about it, do you think Ford just *switched* from 5w-30 to 5w-20 one year because they redesigned the motor and re-tooled their plants for tighter tolerences?
Of course not, it doesn't make sense.
They DID slap a different oil pan on the car after 99(I think that's the year?) which is why the older cars need 5 quarts and the newer ones need 6 quarts.

Ford, like the ricer cars figured out that they can squeeze some extra mpg out of their fleet with 5-w20.
The net is full of this stuff.
Search on CAFE and 5w20 (leave the minus sign out)

That being said, Mobil 1 or Penzoil Platinum or Amsoil would be my choice along with either a Ford or Mobil filter.
Either 5w-20 or 5w-30 is fine IMHO

SVTBill

you have such low miles and if you're still running 87 then it sounds like your relativly stock

just run motor craft sae 5w20 synthetic blend

cheap, still synthetic(ish) and its what ford says to run

if you wanna spend a bunch of money use mobile 1 super syn or RP

there is really no need to, though

its up to you

lizzyfan

+1, driver side 6 plus!