I know this topic has come up a lot on the forums but I was wondering two things that i can't seem to find answered in any of the posts that I searched.

Is there anything other than just draining the old normal oil and then refilling with synthetic? Do i maybe need to flush it with synth or something along those lines?

Also if any leaks are caused by the switch is it possible to fix them(i'll be doin this around 62k)?

 

with my 93 I did 2 changes (6K miles total) of synth blend before going to full synthetic.

For this 04 of mine my first change after getting was to synth blend and 2nd change was to full synth.

 

No need for any type of flush, just drain the old oil and put the synthetic in. If your truck has been regularly maintained, and it doesn't leak oil now, you will have no issues. I switched my truck at 62,000 as well. Synthetic oil does a great job at cleaning, so I did a "short" run (3000 miles) in case it loosened up any crap, and have been changing every 5,000 miles since. I use Mobil 1 5w-30 with a Motorcraft oil filter.

 

Yea like PW01 said you should have no issues you can go longer drain intervels to, i usually do mine anywhere between 5-6,000 and do a oil analysis every other change(unless i see somthing not looking good in the analysis then i would do it every change) .

 

I switched at 70,000 miles or so. Haven't had any issues and I'm using a K&N oil filter.

An individual on the LS1 forums found it to be one of the best filters through oil analysis. I use them on the Ranger, F150 and my race car.

 

I just did a full flush the first day I owned my ranger. I use Royal Purple and a K&N filter. Usually change at 5k, but right now i'm at 7k. On our lincoln with mobil 1 and K&N, we go 10k. Believe it or not......the oil still looks new when drained.