JDubUB

Honestly, I get good prices from a buddy that is a dealer. So I always use them because it is considered by a lot to be the best, and because I get a discount. He has a 2000 page book that has testing on different vehicles with all different brands of oils and amsoil comes out on top out of any. Whether those tests were tweaked or not, it is damn good oil if not the best.

Especial86

iTrader: (1)

I think they are both great oils, but Amsoil is the best... If I couldn't get my hands on Amsoil then I would definitely be running royal purple.

EfJuanFiddy

not trying to thread jack anybody and didnt want to start ANOTHER oil thread but there are alot and none i have read answered my question specifically... but i want to change oil soon (tomorrow or tuesday) and i have done a little research and have decided to go 5w 30 atleast but i dont know if the previous owner used reg/semi/or full synthetic...... ive heard that going from regular to full synthetic is bad because it "cleans to much" and causes leaks, etc...?? what should i go with ? 5.4l 46k miles

Brandmaner

I'm in the same boat. Not sure what previous owner used. I'm 4.6l 137k miles. Sticker says to change at 138.7k miles. So it's getting changed soon, any recommendations? I normally use 20-50w castrol gtx high mileage on my other truck but it had close to 380k miles lol.

EfJuanFiddy

another idea.... at how many miles should you or is there reason to, change from synthetic to regular or semi?? (high milage oils)

EfJuanFiddy

Bump

EfJuanFiddy

Any luck Brandmaner??

Brandmaner

Haven't changed my oil yet and still no recommendations on this newer 4.6l of what to use. I'd like to get some feedback soon though!

EfJuanFiddy

im gonna look around a lot tonight! we have some rough weather so ill be up keepin an eye on everything and diggin for oil options lol

Brandmaner

Sorry bout bad weather keep me posted on oil information though !