No Sythetic In Hemis? Huh?

hoe... said:

Dealer told me do not change oil until 15000km or I would risk not bedding engine in properly, and to only use full synthetic to manufacturers spec, 0/40 here as it's hot.
Apparently they come from new with a special running in oil which needs to stay in until running in miles are completed.
Some customers have been changing oil earlier, thinking they are doing the right thing, but are risking damage/early wear on their engines as a result.
The clearences on the hemi engines are very tight according to the local dealer.
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MANual_puller said:

Nah, to seat rings do 3 good WOT runs from a stop up to 70 the first day. They'll either be seated once done or something was off and the engine grenades under warranty. I personally would change the oil immediately after doing the 3 hard pulls to get that break in crap out of it.

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Jetsfan122 said:

I switched to synthetic on my new truck after 2,000 miles and yes my mechanic recommended it as well.

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yoda said:

The theory use to be, to seat new rings you should break a new engine in with conventional oil.
I have read with modern machining and new ring composition this is no longer true.
Not really sure if I am buying it ever was true.

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jnag48 said:

I have better things to do than troll a ram forum but thanks. I was just seeing if anyone else has been told this

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68PowerWagon said:

I was told the 6.4 in my 2500 came from the factory with synthetic in it. Thought that was really odd. I have always heard before, that hinders the break in process. New engines, I do the first oil change around 1,500 to 2,000 mi. just to get all of the new break in metal out of there. Then follow up with normal driving conditions changes per the manual with synthetic.

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