hi, I am a new owner of 2002 tribute V6. just changed my engine oil to Castrol Edge 5w-30, just want to know which one is the best, Mobile 1?

 

I prefer full synthetic, either Mobil 1, or Castrol. Any of the regular brands (mobil, castrol, valvoline, penzoil) will be equally good. If you want to take the next step up from those...buy Redline or Royal Purple. However, in a street car, I think thats overkill.
Also, my owners manual recomends 5-20...not sure if your weather/use conditions would necessitate 5-30 or whatnot, but check your owners manual, and use what they recomend.
-a

 

many thanks, I checked the manual and it said 5w-20 which I could not find, the two available are castrol 5w-30 or mobile 10w-30, I am planning to use mobile 10w-30 next time.

 

you can and should use 5w/30 not the 5w/20.they changed that just to meet the CAFE requierments.the same ford and mazda engines were in 2001 and 2002 on,but the books said 5w/20.go any good synthetic.plus a good filter,,,mobil 1,K&N, pure one,, 8-10$ filters but its worth it .i go 6 months or 10,000 miles on a change, and if i feel like it,i'll change the filter 1/2 way and top off the oil. read motor-oil-bible and it'll open your eyes to the myth of 3.000 mile oil change.