Hey Slick, I agree , synthetic is better after break in. When I say many complained, I mean a chitpot of people complained about marbles in can sound, especially at start -up. Ford wont replace your engine because its a little noisy. It took a while for everyone with this problem to figure out what they All had in common. But finally decided they all went to synthetic too early. If search was working you would see this was the Topic of about every other thread about 6-8 weeks ago. Hopefully others will chime in? Anyone Anyone

 

That happend to me went to synthetic to early started making funny noises and would eat about a quart of oil every 1000 or so miles so I went back to conventional oil and broke in the motor then switced back to an Amsoil 5W-20 full synthetic and no more problems!!

 

That"s what I"m talking about.

 

My truck had the marble sound after the first oil change with regular dino oil! So you can't say that using synthetic too soon is the cause of this sound.

 

So what do you think the miles should be before the switch

 

My truck has 7,700 miles and I plan on switching to Mobil-1 at around 12-15,000. I used Castrol 5w-20 last time, I think next time I am going to use the Motorcraft 5w-20 synthetic blend. What do you guys think? The only 5w-20 oil I have seen from Motorcraft is the synthetic blend. I wonder if that's what out trucks came with from the factory?

 

Changed oil at 500 miles--used Motorcraft 5W20. At 4,000 miles changed over to Royal Purple Synthetic #11(5W20) Racing oil and a K&N Gold oil filter. Continue to use RP and change it out between 4-5,000 miles. I also add the recommened amount of Dynosurge Metal Treatment at each change too.

I'm not saying this is the 'only' way to do it but my eng. now has 20,600 miles(daily driver and weekend 1/4 mile racer) on it with no 'noise' problems, no measureable oil useage, no 'smokey' exhaust--just runs great. IMHO, synthetic is the way to go--period.

Dan

 

Hey Dan,

Tell us a little more about the Dynosurge Metal Treatment.
Is it like Prolong or Slick-50?

Also, was the Motorcraft oil that you used a synthetic blend?

Sammy

 

Man, you have got a RED Lightning!(Sammy dropped by my home to give me a video of my 12.697@107.02 run.)

Go to www.dynosurge.com for their info--no, I'm not a dist. I have been using it since my first oil change at 1,000 miles(I said '500' but I was wrong.) when I used Motorcraft's dino 5W20.

I don't believe in syn. 'blends'. Use a full syn. like Mobil 1, Amsoil, Redline, or Royal Purple(available from Jegs)

Dan

 

I have got the marble rattle sound to. I am at 9000 miles. I think I am going to go with a synthetic blend first. See how it sounds. Then if it is quiet I will go full synthetic. When I first changed the oil it looked like a synthetic blend.When it came from the factory. It did not look like dino oil. I dont know I might be wrong. Bob.

 

When she comes out of storage, I am going to try 10w30 to eliminate the sound. Someone posted awhile back that they had the oil tested on a factory shipped L and the test came back that the oil they used from the factory was 10w30. I wish he would post some more info regarding that. I can see putting the 5w20(which Ford suggests for emmisions and higher gas mileage) can cause, as my dealer would call it. "lifter knock".

 

Regarding additives. I have never read any third party analysis finding they did any good other than making money for the manufacturer of the product.

 

I had marble sounds too at first change at 600 miles, it went away eventually, switched to amsoil xl-7500 at 5250K at not a peep out of her. she was a good quart low at the change so we will see now what happens with the synthetic.

 

I also just got the amsoil 5w20 7500. I know, atleast for the amsoil, you should NEVER put ANY additives in your synthetic oil. They state it repeatedly on their website.

 

seems that it is a toss up between oils some say yes some no i am going with regular for doil i guess at 500 miles then at 1500 going to mobil 1 5-w30 synthetic
ill see what happens but if it makes noise after first change im going right to synthetic
thanks guys
slick