finally got around to getting it done. I have 12,000 miles on my truck, yesterday changed it over to synthetic oil and added the K&N air filter. I will have to sy that the filter helped the throttle response, as for the oil it does seem to make it run a little smoother. thanks to all the great info. on this site it made it easier to make the decision.

thank you everyone.

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TAZMAN
2000 F-150 XLT Ext. Cab.4.2L V6 5 speed manual,3.08 gear 4X2 Toreado Red,Tinted windows,Flowmaster Dual Exaust. K&N air filter Two 10'' Kickers w/4 channel Kowler amp under back seat.

 

Randy, your diffs allready have synthetic! I wouldn't touch them yet... As for the engine you don't need to do anything but change the oil and filter. The article I was talking about had a 1983 F250 4x4.

 

I installed the K&N filter at 90 miles (after I returned from the dealership) and Synthetic oil at 1,000 miles. No problems at all and the truck runs great!

I also noticed the slight improvement in the throttle response with the filter...but add a superchip and see what happens to it.....WOW!

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2000 F-150 XLT, 4x2, 5.4L Supercab, Styleside, Black with silver two-tone, 3.55, class III towing package with heavy duty cooling package, 4 wheel disk ABS, overhead console, sliding rear window, keyless entry, dark graphite interior, in dash CD, Pendaliner bedliner, K&N air filter, rubberized undercoating, cabin filtration system, Bugflector II, 5W-30 Mobil 1, engine build 10/4/99, **Superchip now installed..WOW!!!!**

 

I have an article somewhere around here in my mess, from a 4wd truck magazine. The article is to help 4x4 owners with MPG. They said to change all your oils to synthetic, especially in the diffs (it will run alot cooler -Our Ford trucks have synthetic oil in the diffs.). Thats one reason why I use synthetic oil, I will soon use synthetic in my 5-speed.

This site is great!!!

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1997 4x4 XLT 4.2l ORP 5-speed
For more details and pics please see my site...Thanks
www.eph1fifty.cjb.net

 

I appreciate the info. and will do that as soon as I can. I have 12,000 miles on her so is ther anything I need to do before I put sythetic in the diff or the manual trans?

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TAZMAN
2000 F-150 XLT Ext. Cab.4.2L V6 5 speed manual,3.08 gear 4X2 Toreado Red,Tinted windows,Flowmaster Dual Exaust. K&N air filter Two 10'' Kickers w/4 channel Kowler amp under back seat.