hello all
just a quick question about synthetic oil.is it would you recomend going full synthetic with these motors? any advice would be appreciated thanks kevin

 

i've been using amsoil xl 5w 20 which is a full syn. i've got about 10k miles with that oil and no problems.

 

sorry guys i forgot to mention i have over 60k miles on it

 

my brother has an '00 f150 with the 5.4 and 158,000 miles. he has been using mobil 1 since new, and the truck is still like new.

 

that doesn't matter 60K isn't that much. The only time high miles ever affected the oil i used was my truck 86 f-150 300ci straight six (now that was one hell of an engine!) 160K and still going strong until i failed to yield right away and some jerk t-boned me! (in another f-150!)

Anyway i didn't use synthetic only cause i didn't want to waste the money. I would use thinner weight oil the winter and thicker in summer.

 

It's made it to 60,000 miles on whatever oil you're using now, why switch?

If it ain't broke, don't break it.

 

Ahhh...I couldn't agree more, I had several of those trucks as well. I can't say a bad thing about that motor. But anyway the two big things with the 5-20 synthetic is gas millage and engine tolerances (specifically crank and bearings). Apparently the specs are tighter on the new motors requiring a thinner oil to get in between the bearing surfaces. The 5-20 is supposed to produce better gas millage a well. I run 5-20 in mine year round. A synthetic will take a lot more heat and millage before the oil starts to break down. As well as cold temps, a 5-20 synthetic will start easier then a 5-20 conventional. It lubricates to its full potential quicker then a conventional. Because temp don't affect them as much. If its a vehicle thats not driven all the time like mine, regardless of millage even synthetic should be replaced about every 6 months, and regular oils every 3. You may not notice much of a difference until you start racking up some miles, but your motor will love it in the long run. My 87 P.O.S., thats a different story.

 

My truck has 130,000 miles & I was wondering what the best oil & weight I should be using is....
thanks..

 

kasparsport stay with 5w-20 or go with 0w-20. I would use a full syn whatever brand floats your boat, i think amsoil is the best.

http://www.amsoil.com/scripts/runisa...msoiloaf:index

 

What did you use for those first 130,000 miles?

If it ain't broke, don't break it. It's not that difficult, y'all...

 

With the Texas heat and the city driving I do I use 5/30 M1 in the summer and go 5/20 M1 in the winter ( 2 weeks in December down here :santa: ).
never a problem and I'm rolling up on 95K.
P.S. I went full Syn. on my '08 Harley MC at the first 1K check up.Certainly quieted it down.

 

They are both 5W at startup. If you are concerned with cold flow issues it is the first number that should be lower not the last. In Texas I would probably just keep it the same all year. It is not as big a difference as up north.

 

If you WANT to switch to synthetic at 60k, you probably will not have any problems as long as it has been well maintained previously and there is no sludge in there already.

 

Alright GLC, now you've got me wondering. Why would switching at higher mileage/improperly maintained truck be a problem?

 

I was curious because I purchased the truck with 129,000 miles on it....
I just didnt know if I should be using a different oil because of the high miles....


thanks for the advice...