Ok, i have usually been using 5w-30, which i like because it gets the truck warmer quicker, but i have some knocking noise which is common with the OHV. I heard a couple people with the OHV that started using 10W-40 and the sound went away some. Is this going to hurt me to switch in anyway? Is it bad to use thicker oil?
Thanks

 

Not bad. do it.

 

I use the 5W-30 with no problems. Try the thicker oil and keep us posted.

 

I'd try 10w-30 first

 

Im having as serious brain fart is 10w-30 heavier then 5w-30 ??? (its sad because i used to work at sprint lube)

Rocky

 

yes at start-up or when its really cold.

 

You can use 10W30 or 10W40 with no problems. Ford specifies 5W30 in 4.0's and 5W20 in later 2.3's and 3.0's because these oils can return very slightly better numbers in the fuel economy ratings derived from the emission tests.

The difference is a small fraction of an MPG and it is nothing that you would notice in ordinary driving but it is important to manufacturers to squeeze out the best numbers possible.

Oils with lower numbers like 5Wxx or 0wxx make starting a bit easier in very cold climates. If you live somewhere like that, it could be a reason to stick with the 5W30 in winter.

 

I use 5w30 Mobil 1 with lucas oil addiitive. It has "piston slap" as you have touched on, but after 1000 or so miles it quiets down. Ford claims it casues no harm, I dont buy it either.

If you truly hate the noise new pistons maybe the way to go.

 

So will the motor get more wear from a "dry start"...using the heavier oil? I mean i just want to use the heavier oil only to get rid of some of the noise, but im sure im just going crazy over somethin small but i just wanna get rid of that freakin nosie!
Get new pistons? Ahh!!

 

if your winter temperatures dont really go below 0 a 10-XX is fine if they go below 0 regularly a 5-xx is alot better. I tend to stay away from 10-40 unless syn because its a 30point vicosity(sp?) spread. And will tend to break down faster than a 10-30.

In all reality at temps over 20degress either is equally good.. with the heavier oil being better if it was say 90+ degrees out.

That all being said i've run the m1 5w-40 syn for the last 35000 miles with absolutely no problems.

 

When i bought my truck it had 37,000.....the people before me used 10w-40 and my motor was knock same as yours....i switch to 5w-30 and put a oil additive in and it seems to quite the motor up a great bit...try like a restore and lucas additive and see if that helps...

 

aight..i might try that