Highest Miles on 4.6?

[65tbirdconv]

I sold off a 93 Grand Marq (wish I had kept it) that had 241k on it when I sold it. It burned oil at a good click, quart about every 1500 miles but otherwise it ran WELL. Motor tight, quiet, no noises. Was on orig trans, 2nd water pump, second alt, everything else was ORIG! I should have kept it. If you keep the oil changed, hell , all the fluid changed they will run ya awhile. You WILL burn oil eventually, its the NORM with these 4.6's.

[Birdman93]

If you have been running regular oil for the last 100k+, you will NOT see benefits from switching to synthetic-in fact, you CAN cause more damage by the switch.

Synthetics are thinner than regular oils, and stand up to thermal breakdown better-but when used in a engine that is over 100K mark, you'll actually increase the wear of the engine.

I have had 4 mechanics tell me that you are better off if you use synthetics right after the breakin period for your motor.

[Glengemen]

Originally Posted by ljreome

i am working on 100k on my 95' 4.6L. I have used only synthetic oil mostly moble one, and change my own oil to counteract the cost of the higher priced synth. oil. Anyway it dosn't burn a once of oil. I atribute this to the synth. oil. I drive it hard too.
rock on

I have a 96 LX that got dumped on its side by the previous owner and it still will get to 100 in no time flat!!
I am nowparting it out, look in the classified section under parting out Tbird