ha its not just mine people who run the 5W20 and a motorcraft filter ive heard them do it mine did.

my buddy does run a FRAM ive tryed to talk him out of it many times but he just wont learn

 

I didn't understand that one - Try it again.

Yes he will

 

[QUOTE=jbrew;4802613]I didn't understand that one - Try it again.

Other people i know that own 97-03 F150's run 6QT of 5W20 and a motorcraft filter and on cold start i hear them knocking away untill they put it in drive.

 

I run 5W20 Mobil 1 EP with a Mobil 1 filter and my engine is quiet on a cold start - and I have 150k on it now.

 

rpms drop from N to D or R, could be part of it. My stock tuning file (4.6) says Idle Speed Drive 600, Idle Speed neutral 704, and + 48 and + 50 respectively with a/c on.

 

It depends, we talking on flat ground or vertical?

At this angle, maybe 200 rpm just struggling to stay alive. Normally i think i set it around 600-650

 

Once again I agree with Brew. MOST car and truck engines SHOULD run just about dead on the RPM stated. Every vehicle that I've had that has had a tac has run in that approximate range from the time they're new. At 900 or more, you're holding the brake excessively at a stop and at too low an RPM (400-500) the oil flow isn't as much as it shoiuld be. (oil IS a coolant as well as lubricant) The "Sweet Spot" is in the range Brew described all the way around, on a properly tuned and running stock engine.

 

I usually idle around 900, unless someone REALLY ticks me of--oh, we are talking about trucks?

 

In that case I'm around 1500-3000

 

FIFY

 

Thanks!