Don't have the docs handy, but I seem to remember Mobil changing the
formulation a while back to include a chemical that would expand the
seals a bit, thus resealing if they're loose. However, at 123k I'd
probably stick with dino simply because it probably wouldn't increase
the lifespan of the motor at this point.
Just my opinion.
on 3/27/01 8:44 PM, Alek Benedict at alek@earthling.net wrote:
> Okay, I figured with the recent discussion regarding Mobil 1
> and synthetics I'd further perpetuate this tired thread.
>
> My truck is due for an oil change in about a month and I was
> thinking of going to Mobil 1. It has about 123k miles and I
> can only assume has been run on dino oil for its life [I put
> in dino the first oil change I did because I had some left].
>
> But I've heard about the stories of synthetic going in an
> engine with high miles and causing leaking seals and the
> like, and thought I'd get some input from you folks. Should
> I go with Mobil 1 and chance it, or keep doing dino oil?
>
> Thanks folks, and sorry to bring it up again.
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