B
Complete BS. 5w20 was speced soley for cafe purposes with out regard for longetivity. Fords triton engines are in fact identical to the ones that speced 5w30. For you guys down south I would use 10w30 year round and for the northern people 10w30 summer/5w30 winter.Lou, like you I was not excited about using that viscosity. Asked around, and apparently manufacturing improvements and so on have resulted in much greater control of journal clearances & tolerances. So Ford actually wants an oil spec'd for better flow. And they don't need to rely on viscosity so much, since a (-) crankshaft journal and (+) main cap is held to a closer range than in 'the old days'.
They probaly realise that the extra wear occuring wont have any effect till the warranty is over. ;)IMO, they would not recommend 5w20 if they felt there were a risk
Yes, I work in QC for a tier2 supplier. I get to deal with GM powertrain as well as the ford and Daimler powertrain units. Belive me when I say the triton engines are identical. BTW ask any tribologist what they think about the 5w20 oils and you will get a ear full.Ben - I see by your sig that you're in Michigan. Do you have some inside skinny here? I'm curious how much of the 'improved mfg. tolerance control' that I was told about is true.
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