At 05:46 AM 2/11/2000 -0800, you wrote:
>Got a friend that just bought a new Dakota. He wants to run synthetic oil
>in it. When should he put the synthetic in? First oil change? How many
>miles? Any synthetic oil prefered over another?
>Thanks
>--Aaron--
Synthetic will stop engine wear, or rather, slow it down to very slow wear
rate. You want the motor fully broke in and the rings fully seated before
switching to synthetic. My opinion is 10K miles. You want the engine to
wear some to open up the bearing clearances a coupe thousandths of an inch
so adequate lubrication is achieved. Stock clearances are very tight,
which leaves little room for oil flow across the bearings. You don't just
want oil pressure, you want oil volume and pressure. If you plan to drive
like a citizen, it doesn't matter when you switch. If you use your truck
as a truck, or like to see if you can fit your foot down the TB over and
over again, or you race, then wider clearances are better - more oil flow,
happier bearings.
Mike
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