Bought a high mileage truck, ? on which oil
01-15-2013, 11:55 PM
#1
Bought a high mileage truck, ? on which oil
Just bought an 06 FX4 with 182,000 miles on the clock. Truck runs and drives like a new one, the 5.4 is quiet as can be with no rattles what so ever. I want to keep it that way for as long as possible. My question is, with not knowing what kind of oil has been run during it's life (no service records and bought from a dealer) would it be a good idea to run a full synthetic?
01-16-2013, 06:49 AM
#2
I'm likely to start an argument here, but with that type of mileage, I personally wouldn't go with a full synthetic. I'd go with a high mileage semi synthetic.....as I'd worry about those seals inside running full synthetic. In a perfect world, I'd say run what has BEEN run in it, but you don't know. If you bought it at a dealer, they LIKELY put motorcraft or at least a comparable semi synthetic in it as that is what the book calls for.
DON'T add aftermarket crap to the oil
and make sure you use a good filter with an anti flowback valve so the top of the engine isn't dry at startup.
These engines if taken care of have been known to go 300k or more miles, but are tempermental on maintenance, kinda like a pretty woman!
DON'T add aftermarket crap to the oil
and make sure you use a good filter with an anti flowback valve so the top of the engine isn't dry at startup.These engines if taken care of have been known to go 300k or more miles, but are tempermental on maintenance, kinda like a pretty woman!
01-17-2013, 01:30 AM
#4
Senior Member
I had a 1996 Jeep Grand Cherokee with the 318 Magnum. It had regular dino oil used in it for the first 80000 miles, then I put in Mobil 1 full synthetic. Driving to work the next day I suddenly lost all oil pressure. Concerned I might have lost the drain plug I pulled over and checked, but everything was fine. The dipstick indicated I had the correct oil level. When I started the engine back up, the pressure gauge indicated normal. As I accellerated, the needle suddenly dropped to zero again. I went ahead and limped it home. I figured my oil pump must have gone bad, so I drained the oil and dropped the pan. What I found was the oil pickup screen clogged with sludge. I cleaned out the pan and the screen, went back to dino oil and all was good.
I rather think that if you even use a blend type oil, you might want to consider changing the oil again much sooner than required a couple times.
I rather think that if you even use a blend type oil, you might want to consider changing the oil again much sooner than required a couple times.
