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I'm having probs trying to find fully synthetic in the proper weight. How bad would it be if I used 10W30? Appreciate any help.

<font size="2" face="Verdana, Arial">Some people find it works better but I think it's the " Placebo Effect". But if you believe the hype I have a nice cordless extension cord to sell ya.Originally posted by Egz:
Anyone have any experience with Royal Purple? Sounds nice, but real world, is it that good?
<font size="2" face="Verdana, Arial">Once you've done an exhaustive research comparing it to the synthetics out there, you'll find that Royal Purple will be better than most. Euro Ford Fan is right; the Valvoline Synthetic is a placebo effect.Originally posted by Egz:
Anyone have any experience with Royal Purple? Sounds nice, but real world, is it that good?
<font size="2" face="Verdana, Arial">DittoOriginally posted by familyman:
Mobil 1 5w30 with motorcraft filters. Only time will tell if I made the right choice.
<font size="2" face="Verdana, Arial">Basicly, the advantage of synthetic is you are getting a consistant level of quality. With conventional oil, you have molecules of varying sizes and durability. Synthetic has a consistant leel of molecule size and quality.Originally posted by Soon2bSaleenZx3:
what EXACTLY are the benefits of synthetic over traditional oil? when i first heard about the 5w20 being for emissions i just said screw it and stuck with traditional 5w30 valvoline or 10w30 for winter. there is no potential for me to be doing harm is there. somebody put link to a great chart about 1-2 months ago, ill see if i can find it, but it seemed useful in explaining what would and wouldnt hurt our engines...i dont want to be doing damage i dont need to do...any reccomendations?
<font size="2" face="Verdana, Arial">fair enough...so what then changed between the engines of '00 and '01 that had Ford switching their recommendation from 5w30 to 5w20??? I doubt they changed the engine, so did they just figure that 5w20 was better? Or did they get marginally better emissions #s without really having to do anything...Originally posted by FocusInterceptor:
Marction, 5w20 is used not so much for emmisions, but for the close tolerances that are in the motor. You must have an oil that will fit in such small spaces