
Originally Posted by
RobertFL
I bought a new 2005 F150 4x4 in Jan 2006. It has the 5.4 3 valve engine that has the spark plugs issues and the cam phaser issues. I only used motor craft 5-20 synthetic blend oil in it. I got 225000 miles on engine before the cam phasers rattled enough to set off the knock sensors. I replaced the engine with a long block 3 years ago along with the original transmission that also had 225000 miles on it.. transmission seemed to be working well but I thought I should have it rebuilt due to the milage. I also had the Air Cond, radiator, belts, water pump and other parts replaced. I always serviced the truck with the correct oils, filters and fluids..and my Ford mechanic buddy could not believe I got more than 80000 miles out of the transmission. I'm not sure about the oil you are asking about. I have had good luck with the Motor craft 5-20 blend and motor craft filters. The 2005 F150 has zero rust but I had to replace the driver seat bottom leather and foam. I do add seafoam or Lucas treatment to the fuel twice a year. On the old engine we replaced the spark plugs at 90000 miles and all 8 came out unbroken. My Ford mech buddy said he had done at least 100 5.4 plug replacements..he said mine came out easy and clean.. I told him I put 4 cans of seafoam in 5 gallons of gasoline and ran it till near empty...then 1 gallon of Lucas on 10 gallons of gas, ran it till almost empty.. then he changed the plugs.. did the same thing at 175000 miles, again no broken spark plugs, plugs were clean. I hope your 5.4 3 valve is a good one. My remanufactured engine has the upgraded oil pump and cam phasers..I hope it lasts as long as the original engine.