I go the extra mile and use royal purple in everything
BigDaveDogg said:Alright, just rolled over to 46,000 this evening so I went out and bought some Mobil 1 5w30 and a Motorcraft FL-820S oil filter. I checked the Haynes manual I picked up a while back, and it stated 97+ 4.6L need 6 quarts, so that's what I put it. All looks good w/ Mobil 1 for now. How many miles do you guys drive w/ Mobil 1 synthetic before changing? I've heard 5,000 miles and 3,000 miles...which is recommended? If it's 5,000 I'll just change it again at 50,000 miles and keep it consistent from there, maybe try Royal Purple. Now I need to look into getting the transmission and rear differential oil changed. I was told not to use synthetic in the differential because it is too thin. If it's 75w90 or whatever, isn't it all the same stuff? And what should I use in the transmission?
XCELR8 said:ummmm... what ever happened to Valvoline?
Danger Dude said:A few years ago I participated in a study using just under 100 Trucks and automobiles. We tested every major Synthetic and regular oil. We also tested oil filters. After every oil change we used universally accepted testing. The results were simple. Every synthetic beat conventional oil hands down and that the difference between synthetics was so small that they were within the + or - varibles. We also found every major brand oil filters met or exceeded manufactures claims.
The truth is you get past the hype by manufactures claims and you cant go wrong with any major synthetic oil or filter. How much you are willing to spend is up to the individual. If you change the oil or filters as reccommended by manufacturers you cant go wrong.
Also dont believe any claims of oil additives when using Synthetic oil. To use it in synthetic is a complete waste of money.
spyne said:Mobil1 and either a Motorcraft or Purolator filter every 5000 miles. It's probably overkill, but better safe than sorry.