>Not sure of current situation, but earlier true synthetics
>could/would swell some rubber (seals) by up to 7%.

I read in several places that the early synthetics would SHRINK seals and
thus some of the leaking problems people would run into...

Now the synthetics will cause the seals to remain stabile or cause them to
expand a bit. That is good because in older engines I am told the new
synthetic oils can wash away deposits of crud that the old dino oils would
create and this crud had a habit of minimizing leaking from seals with high
mileage on them.

Seems to hold true with my '81 Honda CB900 custom. It leaked after an oil
change or two. Then a couple of oil changes later it stopped leaking.

As for the SLICK 50: my Uncle used it for years and years in his El Camino
and his truck lasted many hundreds of thousands of miles. Of course he
might not mention that he went through several engines too. His success is
based more on highway mileage than anything else.

I would stay away from it b/c everything I have read about it said that it
would clog up oil filters and thus not circulate with the oil to do it's
advertised job.

Use synthetic oils instead if you want the best. I use Mobil 1 in both my
Hondas and my Type IV.

Chris M. <"Busbodger" of "TEAM SLOWPOKE">
Cookeville, Tennessee

ICQ# 5944649
scm9985@tntech.edu

'78 VW Westfalia (67 HP -> that is...67 Hamster Power)
'65 Beetle - Type IV powered
'99 CR-V AWD station wagon
'81 CB900 Custom moto-chickle
2.5 Corvair engines for my Trans-vair Conversion